Kubota BX24 Workshop Manual
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Kubota BX24 Workshop Manual

Tractor, front loader, backhoe, rotary mower
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Table of Contents

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WORKSHOP MANUAL
TRACTOR,FRONT LOADER,
BACKHOE,ROTARY MOWER
BX24,LA240,BT601,RCK54,
RCK54P,RCK60B
KiSC issued 08, 2019 A

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Summary of Contents for Kubota BX24

  • Page 1 WORKSHOP MANUAL TRACTOR,FRONT LOADER, BACKHOE,ROTARY MOWER BX24,LA240,BT601,RCK54, RCK54P,RCK60B KiSC issued 08, 2019 A...
  • Page 2 KUBOTA Tractor BX24, KUBOTA Rotary Mower RCK60B-23BX, RCK54P-23BX, RCK54-23BX, KUBOTA Front Loader LA240 and KUBOTA Backhoe BT601. It is divided into three parts, “General”, “Mechanism” and “Servicing” for each section.  General Information on the tractor identification, the general precautions, maintenance check list, check and maintenance and special tools are described.
  • Page 3 Record of Revisions For pdf, use search function {Search word} to find all the revised locations. Last digit Month of Reference of the Main Revised Point and Corrective Measures {Search word} Revision Page Code No. 2019.08 Changed checking hydraulic pump oil flow 5-S5, 5-S6 Correct errors...
  • Page 4 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM SAFETY INSTRUCTIONS SAFETY INSTRUCTIONS SAFETY FIRST This symbol, the industry’s “Safety Alert Symbol”, is used throughout this manual and on labels on the machine itself to warn of the possibility of personal injury. Read these instructions carefully.
  • Page 5 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM SAFETY INSTRUCTIONS SAFETY STARTING • Do not start the engine by shorting across starter terminals or bypassing the safety start switch. • Do not alter or remove any part of machine safety system. • Before starting the engine, make sure that all shift levers are in neutral positions or in disengaged positions.
  • Page 6 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM SAFETY INSTRUCTIONS VENTILATE WORK AREA • If the engine must be running to do some work, make sure the area is well ventilated. Never run the engine in a closed area. The exhaust gas contains poisonous carbon monoxide.
  • Page 7 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM SAFETY INSTRUCTIONS SAFETY DECALS The following safety decals are installed on the machine. If a decal becomes damaged, illegible or is not on the machine, replace it. The decal part number is listed in the parts list.
  • Page 8 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM SAFETY INSTRUCTIONS KiSC issued 08, 2019 A...
  • Page 9 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM SAFETY INSTRUCTIONS KiSC issued 08, 2019 A...
  • Page 10 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM SPECIFICATIONS SPECIFICATIONS Model BX24 PTO power 13.2 kW (17.7 HP)* Maker KUBOTA Model D902-E2-BX-2 Type Indirect Injection, vertical, water-cooled, 4-cycle diesel Number of cylinders 72  73.6 mm (2.83  2.90 in.) Bore and stroke...
  • Page 11 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRAVELLING SPEEDS TRAVELLING SPEEDS Model BX24 26  12.00 – 12 Tire size (Rear) Range gear shift lever km/h mile/h 0 to 6.0 0 to 3.7 Forward (At rated engine rpm) High 0 to 13.0 0 to 8.1...
  • Page 12 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM DIMENSIONS DIMENSIONS KiSC issued 08, 2019 A...
  • Page 13 GENERAL KiSC issued 08, 2019 A...

  • Page 14: Table Of Contents

    GENERAL CONTENTS 1. TRACTOR IDENTIFICATION ................. G-1 2. GENERAL PRECAUTIONS ................G-2 3. HANDLING PRECAUTIONS FOR ELECTRICAL PARTS AND WIRING .. G-3 [1] WIRING...................... G-3 [2] BATTERY....................G-5 [3] FUSE......................G-5 [4] CONNECTOR .................... G-5 [5] HANDLING OF CIRCUIT TESTER............G-6 4.

  • Page 15: Tractor Identification

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM G GENERAL 1. TRACTOR IDENTIFICATION When contacting your local KUBOTA distributor, always specify engine serial number, tractor serial number and hour meter reading. (1) Tractor Identification Plate (3) Engine Serial Number (2) Tractor Serial Number...

  • Page 16: General Precautions

    Screws, bolts and nuts should be installed in their original position to prevent reassembly errors. • When special tools are required, use KUBOTA genuine special tools. Special tools which are not frequently used should be made according to the drawings provided.

  • Page 17: Handling Precautions For Electrical Parts And Wiring

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM G GENERAL 3. HANDLING PRECAUTIONS FOR ELECTRICAL PARTS AND WIRING To ensure safety and prevent damage to the machine and surrounding equipment, heed the following precautions in handling electrical parts and wiring.  IMPORTANT •...
  • Page 18 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM G GENERAL • Securely clamp, being careful not to damage wiring. (1) Clamp (3) Clamp • Wind Clamp Spirally (4) Welding Dent (2) Wire Harness W10114580 • Clamp wiring so that there is no twist, unnecessary sag, or excessive tension, except for movable part, where sag be required.

  • Page 19: Battery

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM G GENERAL [2] BATTERY • Take care not to confuse positive and negative terminal posts. • When removing battery cables, disconnect negative cable first. When installing battery cables, check for polarity and connect positive cable first.

  • Page 20: Handling Of Circuit Tester

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM G GENERAL • Use sandpaper to remove rust from terminals. • Repair deformed terminal. Make certain there is no terminal being exposed or displaced. (1) Exposed Terminal (3) Sandpaper (2) Deformed Terminal (4) Rust W10123460 •...

  • Page 21: Lubricants Fuel And Coolant

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM G GENERAL 4. LUBRICANTS FUEL AND COOLANT Capacity Place Lubricants, fuel and coolant BX24 25.0 L No. 2-D diesel fuel No. 1-D diesel fuel if temperature is below 10 °C Fuel tank 6.6 U.S.gals 5.5 Imp.gals...

  • Page 22: Tightening Torques

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM G GENERAL 5. TIGHTENING TORQUES [1] GENERAL USE SCREWS, BOLTS AND NUTS Screws, bolts and nuts whose tightening torques are not specified in this Workshop Manual should be tightened according to the table below.

  • Page 23: American Standard Screws, Bolts And Nuts With Unc Or Unf Threads

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM G GENERAL [3] AMERICAN STANDARD SCREWS, BOLTS AND NUTS WITH UNC OR UNF THREADS SAE GR.5 SAE GR.8 Grade Unit N·m kgf·m ft-lbs N·m kgf·m ft-lbs Nominal Diameter 5/16 23.1 to 27.8 2.35 to 2.84 17.0 to 20.5...

  • Page 24: Maintenance Check List

    • The items listed above (@ marked) are registered as emission related critical parts by KUBOTA in the U.S.EPA nonroad emission regulation. As the engine owner, you are responsible for the performance of the required maintenance on the engine according to the above instruction.

  • Page 25: Check And Maintenance

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM G GENERAL 7. CHECK AND MAINTENANCE CAUTION • Be sure to check and service the tractor on a level surface with the engine shut off and the parking brake “ON” and implement lowered to the ground.

  • Page 26: Check Points Of Initial 50 Hours

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM G GENERAL [2] CHECK POINTS OF INITIAL 50 HOURS Changing Engine Oil CAUTION • Be sure to stop the engine before changing engine oil. 1. Start and warm up the engine for approx. 5 minutes.
  • Page 27 2. After draining reinstall the drain plug. 3. Clean the transmission strainer. 4. Fill with new KUBOTA SUPER UDT fluid up to the upper notch on the dipstick. 5. After running the engine for a few minutes, stop it and check the oil level again, add oil to prescribed level.

  • Page 28: Check Points Of Every 50 Hours

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM G GENERAL [3] CHECK POINTS OF EVERY 50 HOURS Checking Engine Start System CAUTION • Do not allow anyone near the tractor while testing. • If the tractor does not pass the test do not operate the tractor.
  • Page 29 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM G GENERAL Greasing 1. Apply a small amount of multipurpose grease to the following points. (1) Battery Terminal (2) Speed Control Pedal W1015242 Checking Wheel Mounting Screws Tightening Torque CAUTION • Never operate tractor with a loose rim, wheel, or axle.

  • Page 30: Check Points Of Every 100 Hours

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM G GENERAL [4] CHECK POINTS OF EVERY 100 HOURS Changing Engine Oil 1. See page G-12. W1015501 Checking Battery Condition DANGER To avoid the possibility of battery explosion: For the refillable type battery, follow the instructions below.
  • Page 31 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM G GENERAL Checking Battery Condition (Continued)  Battery Charging CAUTION • When the battery is being activated, hydrogen and oxygen gases in the battery are extremely explosive. Keep open sparks and flames away from the battery at all times, especially when charging the battery.
  • Page 32 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM G GENERAL Checking Battery Condition (Continued)  Battery for storage 1. When storing the tractor for a long period, remove the battery from tractor, adjust the electrolyte to the proper level and store in a dry place out of direct sunlight.
  • Page 33 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM G GENERAL Checking Fuel Lines and Fuel Filter Element CAUTION • Stop the engine and remove the key before checking fuel lines and fuel filter. • Check the fuel lines periodically. The fuel lines are subject to wear and aging.
  • Page 34 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM G GENERAL Checking Fan Belt Tension CAUTION • Be sure to stop engine and remove the key before checking belt tension. 1. Stop the engine and remove the key. 2. Apply moderate thumb pressure to belt between pulleys.
  • Page 35 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM G GENERAL Checking and Adjusting HST Neutral Spring (for Dynamic Braking) WARNING • Do not operate if tractor move on level ground with foot off speed control pedal. • If tractor moves on level ground with foot off the pedal, or, if the pedal is too slow in returning to “NEUTRAL”...

  • Page 36: Check Points Of Every 200 Hours

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM G GENERAL Adjusting Brake Pedal Free Travel CAUTION • Stop the engine, remove the key, lower the implement to the ground, and chock the wheels before checking brake pedal. • Even if the brake pedal free travel is within the limitation, adjust the brake pedal following the procedure below.
  • Page 37 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM G GENERAL Checking Power Steering Line CAUTION • Be sure to stop the engine and remove the key before checking power steering line. 1. Check to see that all lines are tight and not damaged.

  • Page 38: Check Points Of Every 300 Hours

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM G GENERAL [6] CHECK POINTS OF EVERY 300 HOURS Replacing Transmission Oil Filter 1. See page G-13. W1019345 Changing Transmission Fluid 1. See page G-13. W1019295 Cleaning Transmission Oil Strainer 1. When changing the transmission fluid, disassemble and rinse the strainer with nonflammable solvent to completely clean off fillings.

  • Page 39: Check Point Of Every 400 Hours

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM G GENERAL [7] CHECK POINT OF EVERY 400 HOURS Adjusting Front Axle Pivot 1. Remove the split pin (2), tighten the adjusting nut (1). 2. Make sure that one of the nut slots aligns with the split pin hole, tighten the nut slightly if necessary to align.

  • Page 40: Check Point Of Every 800 Hours

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM G GENERAL [9] CHECK POINT OF EVERY 800 HOURS Adjusting Engine Valve Clearance 1. See page 1-S13. W1019995 [10] CHECK POINT OF EVERY 1500 HOURS Checking Fuel Injection Nozzle Injection Pressure 1. See page 1-S20.
  • Page 41 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM G GENERAL Flush Cooling System and Changing Coolant CAUTION • Be sure to stop the engine and remove the key before checking coolant level. • Do not remove the radiator cap when the engine is hot. Then loosen cap slightly to the stop to relieve any excess pressure before removing cap completely.
  • Page 42 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM G GENERAL Flash Cooling system and Changing Coolant (Continued)  Anti-Freeze CAUTION • When using antifreeze, put on some protection such as rubber gloves (Antifreeze contains position.). • If should drink antifreeze, throw up at once and take medical attention.
  • Page 43 The LLC contains anticorrosive agent. If mixed with the cleaning agent, sludge may build up, adversely affecting the engine parts. 7. Kubota’s genuine long-life coolant has a service life of 2 years. Be sure to change the coolant every 2 years. W1032576...

  • Page 44: Others

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM G GENERAL [14] OTHERS Bleeding Fuel System Air must removed: 1. When the fuel filter (2) or lines are removed. 2. When tank is completely empty. 3. After the tractor has not been used for a long period of time.
  • Page 45 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM G GENERAL Replacing Fuse 1. The tractor electrical system is protected from potential damage by fuses. A blown fuse indicates that there is an overload or short somewhere in the electrical system. 2. If any of the fuses should blow, replace with a new one of the same capacity.

  • Page 46: Special Tools

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM G GENERAL 8. SPECIAL TOOLS [1] SPECIAL TOOLS FOR ENGINE Special Use Puller Set Code No.: 07916-09032 Application: Use exclusively for pulling out bearing, gears and other parts with ease. W1024050 Piston Ring Compressor Code No.:...
  • Page 47 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM G GENERAL Diesel Engine Compression Tester (for Glow Plug) Code No.: 07909-39081 (Assembly) 07909-31301 (L) 07909-31291 (K) 07909-31311 (M) Application: Use to measure diesel engine compression and diagnostics of need for major overhaul. (1) Gauge...
  • Page 48 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM G GENERAL Nozzle Tester Code No.: 07909-31361 Application: Use to check the fuel injection pressure and spray pattern of nozzle. Measuring: 0 to 50 MPa range (0 to 500 kgf/cm , 0 to 7000 psi)
  • Page 49 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM G GENERAL Valve Guide Replacing Tool Application: Use to press out and press fit the valve guide. 20 mm dia. (0.79 in. dia.) 9.96 to 9.98 mm dia. (0.3921 to 0.3929 in. dia.) 5.5 to 5.7 mm dia. (0.2165 to 0.2244 in. dia.) 220 mm (8.66 in.)
  • Page 50 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM G GENERAL Flywheel Stopper Application: Use to loosen and tighten the flywheel screw. 200 mm (7.87 in.) 30 mm (1.18 in.) 20 mm (0.79 in.) 15 mm (0.59 in.) 8 mm (0.31 in.) 10 mm dia. (0.39 in. dia.)

  • Page 51: Special Tools For Tractor

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM G GENERAL [2] SPECIAL TOOLS FOR TRACTOR Tie-rod End Lifter Code No.: 07909-39051 Application: Use for removing the tie-rod end with ease. W1026472 Relief Valve Pressure Tester Code No.: 07916-50045 Application: This allows easy measurement of relief set pressure.
  • Page 52 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM G GENERAL Independant PTO Clutch Spring Compression Tool Application: Use for compressing the spring into the spline boss. This tool can be used for B30 series, BX50 series and BX24 tractor. 12 mm (0.47 in.) 25.4 mm (1.00 in.)
  • Page 53 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM G GENERAL Disassembling and Assembling Stand (1/2) Application: Use to disassembling transaxle assembly and to assembling transaxle assembly.  9 mm ( 0.35 in.) 3 Holes 30.5 to 31.5 mm (1.21 to 1.24 in.) 225 mm (8.86 in.)
  • Page 54 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM G GENERAL Disassembling and Assembling Stand (2/2) Application: Use to disassembling transaxle assembly and to assembling transaxle assembly. 311 mm (12.24 in.) 38.1 mm (1.50 in.) 40 mm (1.57 in.) 1.9 mm (0.07 in.) 38.1 mm (1.50 in.)

  • Page 55: Tires

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM G GENERAL 9. TIRES [1] TIRE PRESSURE WARNING • Do not attempt to mount a tire on a rim. This should be done by a qualified person with the proper equipment. • Always maintain the correct tire pressure.

  • Page 56: Wheel Tread

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM G GENERAL [2] WHEEL TREAD The tread can not be adjusted.  IMPORTANT • Do not turn discs to obtain wider tread. • Always attach tires as shown in the drawing. • If not attached as illustrated, transmission parts may be damaged.

  • Page 57: Ballast

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM G GENERAL [3] BALLAST (1) Front Ballast Add weights needed for stability and improve traction. Heavy pulling and heavy rear mounted implements tend to lift front wheels. Add enough ballast to maintain steering control and prevent tip over.

  • Page 58: Rear Ballast

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM G GENERAL (2) Rear Ballast Add weights to rear wheels if needed to improve traction or for stability The amount of rear ballast should be matched to job and the ballast should be remove when it is not needed.

  • Page 59: Implement Limitations

    KUBOTA. Use with implements which exceed the maximum specifications listed below, or which are otherwise unfit for use with the KUBOTA Tractor may result in malfunctions or failures of the tractor, damage to other property and injury to the operator or others. [Any malfunctions or failures of the tractor resulting from use with improper implements are not covered by the warranty.]...
  • Page 60 Trailer Max. Load Capacity 800 kg (1765 lbs) * KUBOTA provides BT601 Backhoe for BX24. No other Backhoe installed by 3-points hitch is permitted for BX24. ** KUBOTA provides LA240 Front-end Loader for BX24.  NOTE • Backhoe cannot be attached.
  • Page 61 ENGINE KiSC issued 08, 2019 A...
  • Page 62 MECHANISM CONTENTS 1. LUBRICATING SYSTEM ................1-M1 2. COOLING SYSTEM ..................1-M2 3. FUEL SYSTEM ..................... 1-M3 KiSC issued 08, 2019 A...
  • Page 63 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE 1. LUBRICATING SYSTEM (1) Rocker Arm (2) Oil Pressure Switch (3) Rocker Arm Shaft (4) Valve (5) Idle Gear (6) Crankshaft (7) Oil Pump (8) Oil Strainer (9) Relief Valve (10) Push Rod...
  • Page 64 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE 2. COOLING SYSTEM (1) Radiator (2) Water Pump (3) Cooling Fan (4) Thermostat (5) Cylinder Head (6) Cylinder Head The cooling system consists of a radiator (1), a centrifugal water pump (2), a cooling fan (3) and a thermostat (4).
  • Page 65 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE 3. FUEL SYSTEM (1) Injection Nozzle (2) Fuel Overflow Pipe (3) Fuel Tank (4) Fuel Filter (5) Fuel Feed Pump (6) Fuel Filter (7) Injection Pump (8) Injection Pipe Fuel from the fuel tank (3) passes through the fuel filter (4), and then enters the injection pump (7) after impurities such as dirt, water, etc.
  • Page 66 SERVICING CONTENTS 1. TROUBLESHOOTING ..................1-S1 2. SERVICING SPECIFICATIONS ..............1-S4 3. TIGHTENING TORQUES ................1-S10 4. CHECKING, DISASSEMBLING AND SERVICING........1-S11 [1] CHECKING AND ADJUSTING .............1-S11 (1) Engine Body..................1-S11 (2) Lubricating System ................1-S14 (3) Cooling System .................1-S15 (4) Fuel System ..................1-S17 [2] DISASSEMBLING AND ASSEMBLING..........1-S22 (1) Separating Engine ................1-S22 (2) Removing Outer Parts ..............1-S25 (3) Cylinder Head and Valves ..............1-S25...

  • Page 67: Troubleshooting

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE 1. TROUBLESHOOTING Reference Symptom Probable Cause Solution Page Engine Does Not No fuel Replenish fuel Start Air in the fuel system Bleed G-30 Water in the fuel system Change fuel and – repair or replace fuel...
  • Page 68 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE Reference Symptom Probable Cause Solution Page Either White or Blue Excessive engine oil Reduce to specified G-12 Exhaust Gas Is level Observed Piston ring and cylinder worn or stuck Repair or replace 1-S37...
  • Page 69 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE Reference Symptom Probable Cause Solution Page Low Oil Pressure Engine oil insufficient Replenish Oil strainer clogged Clean 1-S29 Oil filter clogged Replace G-12 Relief valve stuck with dirt Clean – Relief valve spring weaken or broken...

  • Page 70: Servicing Specifications

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE 2. SERVICING SPECIFICATIONS ENGINE BODY Item Factory Specification Allowable Limit Compression Pressure 3.53 to 4.02 MPa 2.55 MPa 36.0 to 41.0 kgf/cm 26.0 kgf/cm 512 to 583 psi 370 psi Difference among Cylinders –...
  • Page 71 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE ENGINE BODY (Continued) Item Factory Specification Allowable Limit Rocker Arm Shaft to Rocker Arm Clearance 0.016 to 0.045 mm 0.15 mm 0.00063 to 0.00177 in. 0.0059 in. Rocker Arm Shaft O.D. 10.473 to 10.484 mm –...
  • Page 72 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE ENGINE BODY (Continued) Item Factory Specification Allowable Limit Idle Gear Shaft to Idle Gear Bushing Oil Clearance 0.020 to 0.084 mm 0.10 mm 0.00079 to 0.00331 in. 0.0039 in. Idle Gear Shaft O.D.
  • Page 73 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE ENGINE BODY (Continued) Item Factory Specification Allowable Limit Crankpin to Crankpin Bearing Oil Clearance 0.020 to 0.051 mm 0.15 mm 0.00079 to 0.00201 in. 0.0059 in. Crankpin O.D. 33.959 to 33.975 mm –...
  • Page 74 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE LUBRICATING SYSTEM Engine Oil Pressure At Idle Speed More than 49 kPa – 0.5 kgf/cm 7 psi At Rated Speed 196 to 441 kPa 147 kPa 2.0 to 4.5 kgf/cm 1.5 kgf/cm 28 to 64 psi...
  • Page 75 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE FUEL SYSTEM Item Factory Specification Allowable Limit Injection Pump Injection Timing – 0.30 to 0.33 rad (17 to 19°) before T.D.C. Pump Element Fuel Tightness – 13.7 MPa 140 kgf/cm 1991 psi Delivery Valve...

  • Page 76: Tightening Torques

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE 3. TIGHTENING TORQUES Tightening torques of screws, bolts and nuts on the table below are especially specified. (Tractor section for general use screws, bolts and nuts : See page G-8.) Tractor Section Item N·m...

  • Page 77: Checking, Disassembling And Servicing

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE 4. CHECKING, DISASSEMBLING AND SERVICING [1] CHECKING AND ADJUSTING (1) Engine Body Compression Pressure (by Glow Plug Hole Adaptor Setting) 1. Run the engine until it is warmed up. 2. Stop the engine.
  • Page 78 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE Top Clearance 1. Remove the cylinder head. (Do not attempt to remove the cylinder head gasket.) 2. Move the piston up and stick a strip of fuse [1.5 mm dia. (0.059 in. dia.), 5 to 7 mm long (0.197 to 0.276 in. long)] on the piston head at three positions with grease so as to avoid the intake and exhaust valves and the combustion chamber ports.
  • Page 79 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE Checking Valve Clearance  IMPORTANT • Valve clearance must be checked and adjusted when engine is cold. 1. Remove the cylinder head cover and the glow plugs. 2. Align the “1TC” mark (1) on the flywheel and alignment mark (2) on the rear end plate so that the No.

  • Page 80: Lubricating System

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE (2) Lubricating System Engine Oil Pressure 1. Remove the engine oil pressure switch, and set an oil pressure tester. (Code No. : 07916-32032.) 2. Start the engine. After warming up, measure the oil pressure of both idling and rated speeds.

  • Page 81: Cooling System

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE (3) Cooling System Fan Belt Tension 1. Measure the deflection (A), depressing the belt halfway between the fan drive pulley and alternator pulley at specified force 98 N (10 kgf, 22 lbs). 2. If the measurement is not within the factory specifications, loosen the alternator mounting screws and relocate the alternator to adjust.
  • Page 82 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE Radiator Water Leakage 1. Pour a specified amount of water into the radiator. 2. Set a radiator tester (1) and an adapter (2) and raise the water pressure to the specified pressure. 3. Check the radiator for water leaks.

  • Page 83: Fuel System

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE (4) Fuel System Injection Timing 1. Remove the injection pipes. 2. Remove the engine stop solenoid. 3. Turn the flywheel counterclockwise (viewed from flywheel side) until the fuel fills up to the hole of the delivery valve holder (3) for No.
  • Page 84 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE Injection Timing (Continued)  NOTE • The sealant is applied to both sides of the shims (soft metal gasket shim). The liquid gasket is not required for assembling. • Shims are available in thickness of 0.20 mm (0.0079 in.), 0.25 mm (0.0098 in.) and 0.30 mm (0.0118 in.).
  • Page 85 5. Set the speed control lever to the maximum speed position. 6. Run the starter to increase the pressure. 7. If the pressure can not reach the allowable limit, replace the pump with new one or repair with a Kubota-authorized pump service shop. 13.7 MPa...
  • Page 86 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE CAUTION • Check the nozzle injection pressure and condition after confirming that there is nobody standing in the direction the fume goes. • If the fume from the nozzle directly contacts the human body, cells may be destroyed and blood poisoning may be caused.
  • Page 87 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE Nozzle Holder 1. Secure the nozzle retaining nut (7) with a vise. 2. Remove the nozzle holder (1), and take out parts inside. (When reassembling) • Assemble the nozzle in clean fuel oil.

  • Page 88: Disassembling And Assembling

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE [2] DISASSEMBLING AND ASSEMBLING • Before proceding this section, disassembling the loader assembling and backhoe . (Refer to section 8 and (1) Separating Engine Draining Engine Oil 1. Start and warm up the engine for approx. 5 minutes.
  • Page 89 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE Bonnet and Under Cover 1. Remove the front guard (1). 2. Open the bonnet (2), and then loosen the knob bolts and pull forward to remove the under cover (3). 3. Disconnect the connectors (4) for head light and remove the bonnet bracket (5) with bonnet.
  • Page 90 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE Engine Assembly 1. Disconnect the ground cable. 2. Disconnect the front coupling (1). 3. Remove the engine mounting nuts (3). 4. Hook the engine and separate the engine assembly with the radiator from the frame.

  • Page 91: Removing Outer Parts

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE (2) Removing Outer Parts Draining Coolant, Radiator, Air Cleaner and Muffler etc. CAUTION • Never open the radiator cap while operating or immediately after stopping. Otherwise, hot water will spout out from the radiator.
  • Page 92 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE Nozzle Holder Assembly and Glow Plug 1. Remove the overflow pipe (1). 2. Remove the nozzle holder assemblies (2). 3. Remove the copper gasket (5) and heat seal (6). 4. Remove the lead (3) from the glow plugs (4).
  • Page 93 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE Rocker Arm and Push Rod 1. Remove the rocker arm bracket screws (1). 2. Detach the rocker arm assembly (2). 3. Remove the push rods (3). (When reassembling) • When putting the push rods (3) onto the tappets (4), check to see if their ends are properly engaged with the dimples.
  • Page 94 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE Thermostat Assembly 1. Remove the thermostat cover mounting screws (1), and remove the thermostat cover (2). 2. Remove the thermostat assembly (4). (When reassembling) • Apply a liquid gasket (Three Bond 1215 or equivalent) only at the thermostat cover side of the gasket (3).
  • Page 95 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE Oil Pan and Oil Strainer 1. Remove the oil pan mounting screws (1). 2. Remove the oil pan (2) by lightly tapping the rim of the pan with a wooden hammer. 3. Remove the oil strainer (3).

  • Page 96: Gear Case And Timing Gears

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE (4) Gear Case and Timing Gears Injection Pump, Fuel Feed Pump and Speed Control Plate (for Energize to Run Type Engine Stop Solenoid)  NOTE • Specific tool (1) : 1.2 mm diameter hard wire with its end hooked, overall length 200 mm (7.87 in.).
  • Page 97 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE Injection Pump, Fuel Feed Pump and Speed Control Plate (for Energize to Run Type Engine Stop Solenoid) (Continued) (When reassembling) 1. Move the fork lever (1) to the gear case side. 2. Hook the start spring (7) to the injection pump control rack pin (5).
  • Page 98 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE Fan Drive Pulley 1. Secure the flywheel to keep it from turning. 2. Remove the fan drive pulley screw. 3. Draw out the fan drive pulley with a puller. (When reassembling) • Install the pulley to crankshaft, aligning the mark (1) on them.
  • Page 99 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE Gear Case 1. Remove the screw (1) of inside the gear case and outside screws (6). 2. Disconnect the start spring (2) from the fork lever 1. 3. Remove the gear case (4).
  • Page 100 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE Idle Gear 1. Remove the external snap ring (3), the collar (2) and the idle gear (1). 2. Remove the idle gear shaft mounting screws (4). 3. Remove the idle gear shaft (5).

  • Page 101: Piston And Connecting Rod

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE Fuel Camshaft 1. Remove the retaining plate (1). 2. Remove the fork lever holder mounting screws (8), then draw out the injection pump gear (3) and fuel camshaft (2) with the governor fork assembly.
  • Page 102 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE Piston 1. Turn the flywheel and bring the piston to top dead center. 2. Draw out the piston upward by lightly tapping it from the bottom of the crankcase with the grip of a hammer.
  • Page 103 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE Piston Ring and Connecting Rod 1. Remove the piston rings using a piston ring tool. 2. Remove the piston pin (7), and separate the connecting rod (6) from the piston (5). (When reassembling) •...

  • Page 104: Flywheel And Crankshaft

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE (6) Flywheel and Crankshaft Flywheel 1. Secure the flywheel to keep it from turning using a flywheel stopper. (Refer to “SPECIAL TOOLS”.) 2. Remove all flywheel screws (1) and then remove the flywheel (2).
  • Page 105 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE Crankshaft Assembly 1. Remove the main bearing case screw 2 (1). 2. Turn the crankshaft to set the crankpin of the third cylinder to the bottom dead center. Then draw out the crankshaft until the crankpin of the second cylinder comes to the center of the third cylinder.
  • Page 106 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE Main Bearing Case Assembly 1. Remove the two main bearing case screws 1 (9), and remove the main bearing case assembly 1 (1), being careful with crankshaft bearing 3 (4) (5). 2. Remove the main bearing case assembly 2 (2) and the main bearing case assembly (3) as above.

  • Page 107: Injection Nozzle

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE (7) Injection Nozzle Nozzle Holder 1. Secure the nozzle retaining nut (7) with a vise. 2. Remove the nozzle holder (1), and take out parts inside. (When reassembling) • Assemble the nozzle in clean fuel oil.

  • Page 108: Servicing

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE [3] SERVICING (1) Cylinder Head and Valves Cylinder Head Surface Flatness 1. Clean the cylinder head surface. 2. Place a straightedge on the cylinder head’s four sides and two diagonal as shown in the figure.
  • Page 109 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE Valve Recessing 1. Clean the cylinder head surface, valve face and valve seat. 2. Insert the valve into the valve guide. 3. Measure the valve recessing with a depth gauge. 4. If the measurement exceeds the allowable limit, replace the valve.
  • Page 110 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE Replacing Valve Guide (When removing) 1. Press out the used valve guide using a valve guide replacing tool. (Refer to “SPECIAL TOOLS”.) (When installing) 1. Clean a new valve guide and valve guide bore, and apply engine oil to them.
  • Page 111 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE Correcting Valve and Valve Seat  NOTE • Before correcting the valve and seat, check the valve stem and the I.D. of valve guide section, and repair them if necessary. • After correcting the valve seat, be sure to check the valve recessing.
  • Page 112 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE Free Length and Tilt of Valve Spring 1. Measure the free length (A) of valve spring with vernier calipers. If the measurement is less than the allowable limit, replace it. 2. Put the valve spring on a surface plate, place a square on the side of the valve spring.

  • Page 113: Timing Gears

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE Push Rod Alignment 1. Place the push rod on V blocks. 2. Measure the push rod alignment. 3. If the measurement exceeds the allowable limit, replace the push rod. 0.25 mm Push rod alignment Allowable limit 0.0098 in.
  • Page 114 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE Idle Gear Side Clearance 1. Set a dial indicator with its tip on the idle gear. 2. Measure the side clearance by moving the idle gear to the front and rear. 3. If the measurement exceeds the allowable limit, replace the idle gear collar.
  • Page 115 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE Oil Clearance of Camshaft Journal 1. Measure the camshaft journal O.D. with an outside micrometer. 2. Measure the cylinder block bore I.D. for camshaft with a inside micrometer, and calculate the oil clearance.

  • Page 116: Piston And Connecting Rod

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE (3) Piston and Connecting Rod Piston Pin Bore I.D. 1. Measure the piston pin bore I.D. in both the horizontal and vertical directions with a cylinder gauge. 2. If the measurement exceeds the allowable limit, replace the piston.
  • Page 117 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE Connecting Rod Alignment  NOTE • Since checking of the I.D. of the connecting rod small end bushing is the basis of this check, check bushing for wear beforehand. 1. Install the piston pin into the connecting rod.

  • Page 118: Crankshaft

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE (4) Crankshaft Crankshaft Side Clearance 1. Set a dial indicator with its tip on the end of the crankshaft. 2. Measure the side clearance by moving the crankshaft to the front and rear.
  • Page 119 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE Oil Clearance between Crankpin and Crankpin Bearing 1. Clean the crankpin and crankpin bearing. 2. Put a strip of plastigage on the center of the crankpin. 3. Install the connecting rod cap and tighten the connecting rod screws to the specified torque, and remove the cap again.
  • Page 120 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE Oil Clearance between Crankshaft Journal and Crankshaft Bearing 1 1. Measure the O.D. of the crankshaft front journal with an outside micrometer. 2. Measure the I.D. of the crankshaft bearing 1 with an inside micrometer, and calculate the oil clearance.
  • Page 121 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE Oil Clearance between Crankshaft Journal and Crankshaft Bearing 1 (Continued) (Reference) • Undersize crankshaft bearing 1 Undersize Bearing Code Number Marking 0.2 mm Crankshaft bearing 1 02 1G460-23910 020 US 0.008 in. 0.4 mm...
  • Page 122 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE Oil Clearance between Crankshaft Journal and Crankshaft Bearing 2 and Crankshaft Bearing 3 1. Put a strip of plastigage on the center of the journal. 2. Install the bearing case and tighten the bearing case screws 1 to the specified torque, and remove the bearing case again.
  • Page 123 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE Oil Clearance between Crankshaft Journal and Crankshaft Bearing 2 and Crankshaft Bearing 3 (Continued) (Reference) • Undersize crankshaft bearing 2 and 3 (0.2 mm (0.008 in.)) Bearing Code Number Marking Crankshaft bearing 2 02...

  • Page 124: Cylinder

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE (5) Cylinder Cylinder Wear 1. Measure the cylinder liner I.D. at the six positions (see figure) with a cylinder gauge to find the maximum and minimum I.D.’s. 2. Get the difference (Maximum wear) between the maximum and the minimum I.D.’s.
  • Page 125 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ENGINE Clearance between Outer Rotor and Pump Body 1. Measure the clearance between the outer rotor and the pump body with a thickness gauge. 2. If the clearance exceeds the factory specifications, replace the oil pump rotor assembly.
  • Page 126 TRANSAXLE KiSC issued 08, 2019 A...
  • Page 127 MECHANISM CONTENTS 1. STRUCTURE ....................2-M1 2. TRAVELLING SYSTEM ................2-M2 [1] HYDROSTATIC TRANSMISSION ............2-M2 (1) Structure .................... 2-M2 (2) Oil Flow ....................2-M3 (3) HST Control Linkage................2-M8 (4) Speed Set Linkage................2-M9 [2] RANGE GEAR SHIFT SECTION............2-M11 [3] FRONT WHEEL DRIVE SECTION .............

  • Page 128: Structure

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE 1. STRUCTURE (1) Hydrostatic Transmission (4) Front Wheel Drive Gear (7) Rear PTO Section A : Front Side (2) PTO Clutch Section Section (8) Differential Gear Section B : Rear Side (3) Range Gear Shift Section...

  • Page 129: Travelling System

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE 2. TRAVELLING SYSTEM [1] HYDROSTATIC TRANSMISSION (1) Structure (1) Check and High Pressure (6) Thrust Ball Bearing (12) Cir-Clip (17) Needle Bearing Relief Valve (7) Swashplate (13) Thrust Ball Bearing (18) Ball Bearing...

  • Page 130: Oil Flow

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE (2) Oil Flow (1) Cylinder Block (Pump) (7) High Pressure Relief Port (13) Power Steering Controller A : A Port (2) Swashplate Plug (Forward) (14) Hydraulic Pump B : B Port (3) Piston...
  • Page 131 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE  Neutral (1) Cylinder Block (Pump) (7) High Pressure Relief Port (13) Power Steering Controller A : A Port (2) Swashplate Plug (Forward) (14) Hydraulic Pump B : B Port (3) Piston (8) Charge Relief Valve...
  • Page 132 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE  Forward (1) Cylinder Block (Pump) (7) High Pressure Relief Port (13) Power Steering Controller A : A Port (2) Swashplate Plug (Forward) (14) Hydraulic Pump B : B Port (3) Piston (8) Charge Relief Valve...
  • Page 133 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE  Reverse (1) Cylinder Block (Pump) (7) High Pressure Relief Port (13) Power Steering Controller A : A Port (2) Swashplate Plug (Forward) (14) Hydraulic Pump B : B Port (3) Piston (8) Charge Relief Valve...
  • Page 134 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE  Relief (Reverse) (1) Cylinder Block (Pump) (7) High Pressure Relief Port (13) Power Steering Controller A : A Port (2) Swashplate Plug (Forward) (14) Hydraulic Pump B : B Port (3) Piston...

  • Page 135: Hst Control Linkage

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE (3) HST Control Linkage (1) Neutral Spring (2) Trunnion Arm (3) Cruise Rod (4) Brake Pedal (5) Speed Control Pedal (6) Parking Plate (7) Cruise Arm (8) Cruise Lock (9) Cruise Lock (10) HST Pedal Link...

  • Page 136: Speed Set Linkage

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE (4) Speed Set Linkage  Speed Set (1) Speed Set Rod (2) Brake Pedal (3) Speed Control Pedal (4) Parking Brake Lock Pedal (5) Cruise Arm (6) Cruise Lock (7) Cruise Lock (8) HST Pedal Link...
  • Page 137 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE  When the Brake Pedal is Depressed (1) Brake Rod (2) Speed Control Pedal (3) Parking Brake Lock Pedal (4) Brake Pedal (5) Release Plate (6) Speed Set Rod (7) Cruise Arm (8) Cruise Lock...

  • Page 138: Range Gear Shift Section

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE [2] RANGE GEAR SHIFT SECTION Two kinds of power flow are selected by operating the range gear shift lever to shift the 16T-24T shifter gear (4) on the spiral bevel gear shaft (3).

  • Page 139: Differential Gear Section

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE [4] DIFFERENTIAL GEAR SECTION (1) Differential Gears (1) Differential Case (2) Differential Pinion (3) 37T Spiral Bevel Gear (4) 10T Final Gear Shaft (5) Differential Side Gear (6) Differential Pinion Shaft (7) 66T Final Gear...

  • Page 140: Differential Lock

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE (2) Differential Lock (1) Rear Axle (2) Differential Lock Shifter (3) Differential Case (4) Differential Pinion (5) Rear Axle (6) Differential Lock Arm (7) Differential Lock Shaft (8) Differential Lock Shift Fork (9) Differential Side Gear...

  • Page 141: Brake Section

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE [5] BRAKE SECTION (1) Rear Axle LH (2) Final Gear Shaft (3) Shim (4) Bearing Holder (5) Friction Plate (6) Actuator (7) Steel Ball (8) Cam Lever (9) O-ring (10) Rear Axle RH...

  • Page 142: Pto System

    D : To Hydrostatic Transmission (4) Transmission Case The BX24 equipped with hydraulic independent PTO clutch (wet multi-plates type). Therefore, the engine power engages or disengages to the PTO shafts without stopping the tractor movement. The PTO clutch pack (2) has four clutch discs, four drive plates, pressure plate, clutch piston and so on.
  • Page 143 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE  PTO Clutch Relief Valve The PTO clutch relief valve is provided to control the PTO operating pressure. When the oil pressure exceed the relief valve setting pressure, relief valve opens and flows...
  • Page 144 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE  PTO Clutch “Disengaged” When the PTO clutch lever is set at the “Disengaged” position, the PTO clutch valve closes the oil passage to the PTO clutch pack. The oil in the PTO clutch pack drain into the transaxle case (10).

  • Page 145: Mid And Rear Pto Section

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE [2] MID AND REAR PTO SECTION (1) HST Pump Shaft (4) Rear PTO Shaft (6) 24T Mid PTO Idle Gear (8) 28T PTO Select Gear (2) 12T Clutch Gear (5) 23T Mid PTO Gear...

  • Page 146: Others

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE 4. OTHERS [1] HYDRAULIC PUMP DRIVE GEAR SECTION (1) HST Pump Shaft (2) Spline Boss (3) Idle Gear (4) Hydraulic Pump Drive Gear Shaft (5) Hydraulic Pump Drive Gear (6) Hydraulic Pump Drive Gear...
  • Page 147 SERVICING CONTENTS TROUBLESHOOTING ...................2-S1 2. SERVICING SPECIFICATIONS ..............2-S5 3. TIGHTENING TORQUES ................2-S7 4. CHECKING, DISASSEMBLING AND SERVICING........2-S8 [1] CHECKING AND ADJUSTING ...............2-S8 [2] PREPARATION ..................2-S16 (1) Separating Transaxle ................2-S16 [3] DISASSEMBLING AND ASSEMBLING..........2-S23 (1) Hydrostatic Transmission..............2-S23 (2) Hydraulic Cylinder................2-S29 (3) Transaxle Shafts ................2-S30 (4) Assembling Shafts ................2-S38 [4] SERVICING ....................2-S40 (1) Hydrostatic Transmission..............2-S40...

  • Page 148: Troubleshooting

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE 1. TROUBLESHOOTING HYDROSTATIC TRANSMISSION Reference Symptom Probable Cause Solution Page System Will Not Oil level is low Check oil level or fill G-13 Operate in Either oil to proper level Direction Speed control pedal linkage defective...
  • Page 149 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE HYDROSTATIC TRANSMISSION (Continued) Reference Symptom Probable Cause Solution Page Loss of Power Oil level is low Check oil level or fill G-13 oil to proper level Speed control pedal linkage defective Repair linkage...
  • Page 150 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE TRAVELLING GEAR SHIFT SECTION Reference Symptom Probable Cause Solution Page Noise from Transmission oil insufficient Refill G-7, 2-S16 Transmission Gear worn or broken Replace – Bearings worn Replace – Gear Slip Out of...
  • Page 151 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE PTO SECTION Reference Symptom Probable Cause Solution Page PTO Clutch Slip Operating pressure is low Check 2-S15 PTO clutch valve malfunctioning Repair or replace 2-S23 Clutch disc or drive plate excessively worn Replace...

  • Page 152: Servicing Specifications

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE 2. SERVICING SPECIFICATIONS Item Factory Specification Allowable Limit Charge Relief Valve Setting Pressure 0.55 to 0.75 kPa – [Oil temperature at 50 C, 122 F] 5.6 to 7.7 kgf/cm 79.8 to 108.8 psi...
  • Page 153 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE (Continued) Item Factory Specification Allowable Limit Differential Pinion to Differential Side Gear Backlash 0.15 to 0.30 mm 0.40 mm 0.0059 to 0.0118 in. 0.0157 in. Spiral Bevel Pinion Shaft to Spiral Bevel Backlash 0.10 to 0.30 mm...

  • Page 154: Tightening Torques

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE 3. TIGHTENING TORQUES Tightening torques of screws, bolts and nuts on the table below are especially specified. (For general use screws, bolts and nuts : See page G-8.) Item N·m kgf·m ft-lbs Charge relief valve checking plug (R 1/4) 29 to 44 3.0 to 4.5...

  • Page 155: Checking, Disassembling And Servicing

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE 4. CHECKING, DISASSEMBLING AND SERVICING [1] CHECKING AND ADJUSTING Adjusting Maximum Speed  Forward 1. Depress the speed control pedal (1) all the way and lengthen the stopper bolt (2) until it touches the speed control pedal (2).
  • Page 156 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE Preparation before HST Adjustment CAUTION • Park the machine on a firm and level ground. 1. Place the wooden blocks at the front and the rear side of the wheels not to move the tractor.
  • Page 157 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE Adjustment of HST Neutral Position 1. Start the engine. 2. Keep the engine at the maximum revolution. 3. Shift the range shift lever (1) to “Hi” position (B). 4. Loosen the locking screw (5).
  • Page 158 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE Checking and Adjusting HST Neutral Spring (for Dynamic Braking) WARNING • Do not operate if tractor move on level ground with foot off speed control pedal. • If tractor moves on level ground with foot off the pedal, or, if the pedal is too slow in returning to “Neutral”...
  • Page 159 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE Charge Relief Pressure CAUTION • When checking, park the tractor on flat ground, and apply the parking brake. 1. Remove the plug (R 1/4) (1) from the front cover, then install the adaptor (R 1/4) and pressure gauge.
  • Page 160 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE High Relief Pressure (Reverse) CAUTION • When checking, park the tractor on flat ground, and apply the parking brake. 1. Remove the hexagon socket head plug (R 1/4) from P1 (1), then install the adaptor, cable and pressure gauge.
  • Page 161 Due to its Loose Hexagon Socket Head Screw)  IMPORTANT • KUBOTA does not recommend the readjustment of relief valve. KUBOTA recommends with genuine parts. • As the HST may be damaged if the pressure is set to high by mistake, be careful when adjusting it.
  • Page 162 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE PTO Clutch Operating Pressure CAUTION • When checking, park the tractor on flat ground, apply the parking brake. 1. Remove the under panel. 2. Connect the adaptor of A between the power steering return hose (1), then connect the adaptor B and the pressure gauge with adaptor A.

  • Page 163: Preparation

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE [2] PREPARATION • Before proceding this section, disassembling the loader assembling and backhoe . (Refer to section 8 and (1) Separating Transaxle Draining Transmission Fluid CAUTION • Be sure to stop the engine before checking and changing the transmission fluid.
  • Page 164 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE Roll-Over Protective Structures (ROPS) and Seat 1. Disconnect the lead wires from the hazard lights (2), (4) and turn signal lights (3), (5). 2. Remove the ROPS mounting nuts, and remove the ROPS (1).
  • Page 165 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE Fender Center Stay 1. Remove the fender bracket (2). 2. Remove the fender center stay (1). (When reassembling) 124 to 147 N·m Fender bracket mounting Tightening torque 12.6 to 15.0 Kgf·m bolt 91.2 to 108 ft-lbs...
  • Page 166 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE Sub Frame Fender Bracket and Hitch Plate 1. Remove the sub frame (3). 2. Remove the hitch plate (4). 3. Remove the fender brackets (1), (2). (When reassembling) • Do not firmly tighten all screws, bolts and nuts until most components are attached.
  • Page 167 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE Transaxle Assembly 1. Remove the differential lock rod (1). 2. Remove the brake rod (3). 3. Disconnect the pipes (2). 4. Disconnect the connector (4). 5. Remove the rear coupling mounting bolt (7).
  • Page 168 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE Brake Pedal and Propeller Shaft 1. Unhook the spring (3) and the parking plate (4). 2. Removing the spring pin (5) from the brake pedal (1). Disconnect the brake spring (2) and remove the brake pedal (1).
  • Page 169 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE Speed Control Pedal, HST Damper and Cruise Control Rod 1. Remove the speed control pedal (1). 2. Remove the rue ring cotter (4). 3. Remove the HST dumper (2). 4. Remove the cruise upper rod (7).

  • Page 170: Disassembling And Assembling

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE [3] DISASSEMBLING AND ASSEMBLING (1) Hydrostatic Transmission Levers and Mower Lift Arm 1. Tap out the spring pin from the range gear shift lever (1) and front wheel drive lever (3), then remove the both levers.
  • Page 171 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE HST Front Cover 1. Remove the internal cir-clip (4). 2. Remove the HST front cover. 3. Remove the HST front cover (1) not to damage the oil seal (5). 4. Remove the center section (6).
  • Page 172 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE Check and High Pressure Relief Valve Plug 1. Remove the check and high pressure relief plug (G 1/2). (When reassembling) 59.0 to 78.0 N·m Check and high pressure Tightening torque 6.0 to 8.0 kgf·m relief valve plug (G 1/2) 43.5 to 57.5 ft-lbs...
  • Page 173 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE Cylinder Block 1. Remove the gasket (1). 2. Remove the O-ring (2). 3. Remove the cylinder block assembly (4) (5) from the transaxle. (When reassembling) • Turn the disassembling and the assembling stand vertically.
  • Page 174 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE Swashplate and Trust Roller Bearing 1. Remove the cir-clip (6) from the pump shaft (3) and the motor shaft (1). 2. Remove the thrust bearing (2). 3. Remove the swashplate (5) and the thrust roller bearing (4).
  • Page 175 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE 4WD Detent Ball 1. Remove the 4WD detent bolt (1), the detent spring (2) and the detent ball (3) before removing the transaxle front case, not to drop the detent ball (3) into the transaxle case.

  • Page 176: Hydraulic Cylinder

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE (2) Hydraulic Cylinder Hydraulic Cylinder 1. Disconnect the delivery pipe (1). 2. Remove the hydraulic cylinder mounting bolts (3). 3. Remove the hydraulic cylinder (2). (When reassembling) • Apply liquid gasket (Three Bond 1208D or equivalent) to the joint surface of the transaxle case to the hydraulic cylinder.

  • Page 177: Transaxle Shafts

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE (3) Transaxle Shafts Transaxle Case Front Cover  NOTE • Before removing the transaxle case front cover (4), remove the 4WD detent bolt (1), the detent spring (2) and the detent ball (3) from the transaxle case front cover (4).
  • Page 178 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE Hydraulic Pump Assembly 1. Remove the hydraulic pump assembly mounting bolt (2), (3). 2. Remove the hydraulic pump assembly (1) as an unit from the transaxle case. (When reassembling) • Apply transmission oil to the O-rings.
  • Page 179 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE Rear PTO Cover Assembly 1. Remove the rear PTO cover mounting bolts (1). 2. Remove the rear PTO cover (2). 3. Remove the rear PTO shaft (5) from the rear PTO cover (2).
  • Page 180 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE Rear Axle (LH)  NOTE • Prepare a specially bent snap ring plier. 1. Draw out the oil seal with a screw driver. 2. Remove the internal cir-clip from the rear axle case.
  • Page 181 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE Rear Axle Case (RH) 1. Remove the rear axle case (RH) mounting bolts. 2. Remove the rear axle case (RH) (1) as an assembly from the transaxle case.  NOTE • Since the adjusting shims are installed behind the 37T spiral bevel gear, check the shims.
  • Page 182 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE 66T Final Gear 1. Remove the bearing (2) with a puller. 2. Remove the bearing (4) with a puller. 3. Remove the differential lock shifter (5) and 66T final gear (6). 4. Put parting marks on the differential pinions (12), (16) and the differential side gears (9), (14).
  • Page 183 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE Rear Axle Case, RH and Brake 1. Remove the internal cir-clip (1). 2. Remove the shim (9), the bearing holder (8) and the other brake parts from the brake case. (When reassembling) • Apply grease to the steel balls.
  • Page 184 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE PTO Clutch Assembly 1. Remove the bearing (2). 2. Remove the external cir-clip and the outlet gear (3). 3. Remove the seal rings (6). 4. Remove the bearing (5). 5. Remove the external cir-clip (18) using a clutch spring compressor.

  • Page 185: Assembling Shafts

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE (4) Assembling Shafts Assembling Select Arms and HST Pump Shaft (PTO Clutch Shaft) 1. Install the PTO select arm (1). 2. Install the range shift arm (2) and the front wheel drive shaft arm (3).
  • Page 186 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE Front Wheel Drive Shaft, Shifter, Spiral Bevel Pinion Shaft and Mid-PTO Shaft 1. Install the front drive shaft (1). 2. Install the shifter (2) and the spiral bevel pinion shaft (3) together. 3. Install the mid-PTO idle gear shaft (5) and the mid-PTO shaft (6) and the HST motor shaft (4) together.

  • Page 187: Servicing

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE [4] SERVICING (1) Hydrostatic Transmission Center Section 1. Check the center section surface (1) for scratches or wear. 2. If deep scratch or excessive wear is found, replace the hydrostatic transmission assembly. (1) Center Section Surface...
  • Page 188 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE Cylinder Block Assembly 1. Check the cylinder blocks (1) and the pistons (2) for scratches and wear. 2. If there are scratch or worn, replace the cylinder block assembly. 3. Check the pistons for their free movement in the cylinder block bores.

  • Page 189: Transaxle Case

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE Pump Shaft (PTO Clutch Shaft) 1. Check the seal surface (1) and the bearing surface. 2. If the pump shaft is rough or grooved, replace it. 3. If the ball bearing or the needle bearing is worn, replace it.
  • Page 190 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE Separate Plate and Back Plate Wear 1. Measure the thickness of pressure plate and steel back with vernier calipers. 2. If the thickness is less than the allowable limit, replace it. 0.945 to 1.055 mm Factory spec.
  • Page 191 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE Clearance between Differential Case and Differential Side Gear 1. Measure the differential side gear boss O.D. with an outside micrometer. 2. Measure the differential case I.D. with a cylinder gauge and calculate the clearance.
  • Page 192 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE Backlash between Spiral Bevel Pinion Gear and Bevel Gear 1. Temporarily assemble the spiral bevel pinion gear (2) and the bevel gear (1) in the transaxle case. 2. Prepare the fuse bent already three to four times.
  • Page 193 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TRANSAXLE Height of Cam Plate and Ball 1. Measure the height of the cam plate with the ball installed. 2. If the measurement is less than the allowable limit, replace the cam plate and balls.
  • Page 194 FRONT AXLE KiSC issued 08, 2019 A...
  • Page 195 MECHANISM CONTENTS 1. STRUCTURE ....................3-M1 2. FRONT WHEEL ALIGNMENT ..............3-M2 KiSC issued 08, 2019 A...
  • Page 196 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM FRONT AXLE 1. STRUCTURE (1) Axle (6) Bevel Gear (11) Differential Pinion Shaft (16) Bevel Gear Shaft (2) Axle Flange (7) Differential Yoke Shaft, RH (12) Differential Yoke Shaft, LH (17) Front Gear Case...
  • Page 197 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM FRONT AXLE 2. FRONT WHEEL ALIGNMENT To assure smooth mobility or maneuverability and enhance stable and straight running, the front wheels are mounted at an angle to the right, left and forward directions. This arrangement is referred to as the Front Wheel Alignment.
  • Page 198 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM FRONT AXLE  Toe-in Viewing the front wheels from above reveals that the distance between the toes of the front wheels is smaller than that between the heels. It is called toe-in. The front wheels tend to roll outward due to the camber, but toe-in offsets it and ensures parallel rolling of the front wheels.
  • Page 199 SERVICING CONTENTS 1. TROUBLESHOOTING ..................3-S1 2. SERVICING SPECIFICATIONS ..............3-S2 3. TIGHTENING TORQUES ................3-S3 4. CHECKING, DISASSEMBLING AND SERVICING........3-S4 [1] CHECKING AND ADJUSTING ...............3-S4 [2] PREPARATION ..................3-S5 (1) Separating Front Axle Assembly............3-S5 [3] DISASSEMBLING AND ASSEMBLING..........3-S8 (1) Front Axle Assembly ................3-S8 [4] SERVICING ....................3-S12 KiSC issued 08, 2019 A...

  • Page 200: Troubleshooting

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM FRONT AXLE 1. TROUBLESHOOTING Reference Symptom Probable Cause Solution Page Front Wheels Tire pressure uneven Adjust G-41 Wander to Right or Improper toe-in adjustment (improper alignment) Adjust G-23, 3-S4 Left Clearance between center pin and pin support...

  • Page 201: Servicing Specifications

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM FRONT AXLE 2. SERVICING SPECIFICATIONS Item Factory Specification Allowable Limit Front Wheel Alignment Toe-in 0 to 5 mm – 0 to 0.19 in. Front Axle Rocking Force 49.0 to 117.7 N – 5.0 to 12.0 kgf 11.0 to 26.5 lbs...

  • Page 202: Tightening Torques

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM FRONT AXLE 3. TIGHTENING TORQUES Tightening torques of screws, bolts and nuts on the table below are especially specified. (For general use screws, bolts and nuts : See page G-8.) Item N·m kgf·m ft-lbs Front wheel mounting screw 149.2 to 179.0...

  • Page 203: Checking, Disassembling And Servicing

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM FRONT AXLE 4. CHECKING, DISASSEMBLING AND SERVICING [1] CHECKING AND ADJUSTING Toe-in 1. Inflate the tires to the specified pressure. 2. Turn the front wheels straight ahead. 3. Measure the toe-in ((B)-(A)). 4. If the measurement is not within the factory specifications, adjust the tie-rod length.

  • Page 204: Preparation

     IMPORTANT • After ten minutes, check the oil level again, add oil to prescribed level. • Use KUBOTA SUPER UDT fluid or SAE80, 90 gear oil. Refer to “LUBRICANTS, FUEL AND COOLANT”. (See page G-7.) 4.7 L Oil Capacity 5.0 U.S.qts...
  • Page 205 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM FRONT AXLE Battery CAUTION • When disconnecting the battery cables, disconnect the negative cable from the battery first. When connecting, connect the positive cable to the battery first. 1. Remove the under panel (1).
  • Page 206 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM FRONT AXLE Disconnecting Propeller Shaft 1. Tap out the spring pins (2) and disconnect the universal joint (1) and spiral bevel pinion shaft. (When reassembling) • Apply grease to the splines of the propeller shaft and universal joint.

  • Page 207: Disassembling And Assembling

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM FRONT AXLE [3] DISASSEMBLING AND ASSEMBLING (1) Front Axle Assembly Power Steering Cylinder 1. Remove the cotter pin and remove the slotted nut for tie-rod (1). 2. Remove the power steering cylinder mounting screws and remove the power steering cylinder (2) with tie-rod.
  • Page 208 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM FRONT AXLE 36T Bevel Gear and Front Axle Shaft 1. Remove the bearing (5). 2. Take out the 36T bevel gear (4). 3. Take out the collar (3). 4. Tap out the axle shaft (2).
  • Page 209 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM FRONT AXLE Front Gear Case and Bevel Gear Case 1. Remove the internal snap ring (1). 2. Remove the bevel gear with ball bearing (3) and shim (2). 3. Remove the bevel gear (4).
  • Page 210 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM FRONT AXLE Bevel Pinion Shaft and Differential Gear Assembly 1. Take out the differential yoke shaft (4), (7). 2. Remove the oil seal (11). 3. Remove the internal snap ring (1). 4. Pull out the bevel pinion shaft (3).

  • Page 211: Servicing

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM FRONT AXLE [4] SERVICING Clearance between Differential Case and Differential Side Gear 1. Measure the differential side gear boss O.D.. 2. Measure the differential case bore I.D., and calculate the clearance. 3. Measure the differential case cover bore I.D., and calculate the clearance.
  • Page 212 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM FRONT AXLE Turning Torque of Bevel Pinion Shaft 1. Cramp the spiral bevel pinion shaft assembly to the vise and tighten the staking nut. 2. Measure the turning torque of bevel pinion shaft. 3. If the turning torque is not within the factory specifications, adjust with the lock nut.
  • Page 213 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM FRONT AXLE Backlash between 12T Bevel Gear and 15T Bevel Gear 1. Stick a strip of fuse to three spots on the 15T bevel gear (1) with grease. 2. Fix the front axle case, bevel gear case and front gear case.
  • Page 214 STEERING KiSC issued 08, 2019 A...
  • Page 215 MECHANISM CONTENTS 1. HYDRAULIC CIRCUIT .................. 4-M1 2. STEERING CONTROLLER ................4-M2 3. STEERING CYLINDER................. 4-M3 KiSC issued 08, 2019 A...
  • Page 216 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM STEERING 1. HYDRAULIC CIRCUIT (1) Steering Controller (2) Steering Cylinder (3) Flow Priority Valve (4) Hydraulic Control Valve Assembly (5) Hydraulic Pump (6) Oil Strainer A : To PTO Clutch Valve B : To HST...
  • Page 217 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM STEERING 2. STEERING CONTROLLER The steering controller consists of a control valve (4) and a metering device (3).  Control Valve The control valve is a rotating spool type. When the steering wheel is not turned, the position of the spool (7) and sleeve (9) is kept neutral by the centering spring (8).
  • Page 218 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM STEERING 3. STEERING CYLINDER (1) Rod (4) Guide (7) Center Piston (10) Cylinder Tube (2) Wiper Seal (5) O-ring (8) Piston O-ring (11) Rod O-ring (3) Internal Snap Ring (6) Seal Ring (9) External Snap Ring The steering cylinder is single piston both rod double-acting type.
  • Page 219 SERVICING CONTENTS 1. TROUBLESHOOTING ..................4-S1 2. SERVICING SPECIFICATIONS ..............4-S2 3. TIGHTENING TORQUES ................4-S3 4. CHECKING, DISASSEMBLING AND SERVICING........4-S4 [1] CHECKING ....................4-S4 (1) Relief Valve..................4-S4 [2] PREPARATION ..................4-S4 (1) Separating Power Steering Controller ..........4-S4 (2) Separating Power Steering Cylinder ...........4-S6 [3] DISASSEMBLING AND ASSEMBLING..........4-S8 (1) Power Steering Cylinder ..............4-S8 [4] SERVICING ....................4-S9 KiSC issued 08, 2019 A...

  • Page 220: Troubleshooting

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM STEERING 1. TROUBLESHOOTING Reference Symptom Probable Cause Solution Page Cannot Be Steered Steering controller malfunctioning Replace 4-S5 Hard Steering Power steering oil improper Change with G-13 specified oil Hydraulic pump malfunctioning Replace 5-S13 Flow priority valve malfunctioning...

  • Page 221: Servicing Specifications

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM STEERING 2. SERVICING SPECIFICATIONS POWER STEERING BODY Item Factory Specification Allowable Limit Relief Valve Operating 8.33 to 8.83 MPa – Pressure 85.0 to 90.0 kgf/cm 1209 to 1280 psi W1013874 STEERING CYLINDER Steering Cylinder I.D.

  • Page 222: Tightening Torques

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM STEERING 3. TIGHTENING TORQUES Tightening torques of screws, bolts and nuts on the table below are especially specified. (For general use screws, bolts and nuts : See page G-8.) Item N·m kgf·m ft-lbs Steering wheel mounting nut 20 to 25 2.0 to 2.6...

  • Page 223: Checking, Disassembling And Servicing

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM STEERING 4. CHECKING, DISASSEMBLING AND SERVICING [1] CHECKING (1) Relief Valve Relief Valve Operating Pressure 1. Disconnect the power steering hose L (or R) from steering controller, and set a pressure gauge and hose.
  • Page 224 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM STEERING Steering Wheel 1. Remove the steering wheel cap (1). 2. Remove the steering wheel mounting nut and remove the steering wheel. (When reassembling) 20 to 25 N·m Steering wheel mounting Tightening torque 2.0 to 2.6 kgf·m 14.8 to 18.4 ft-lbs...

  • Page 225: Separating Power Steering Cylinder

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM STEERING (2) Separating Power Steering Cylinder Bonnet and Under Cover 1. Remove the front guard (1). 2. Open the bonnet (2), and then loosen the knob bolts and pull forward to remove the under cover (3).
  • Page 226 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM STEERING Power Steering Cylinder 1. Remove the cotter pin and remove the slotted nut for tie-rod (1). 2. Remove the power steering cylinder mounting screws and remove the power steering cylinder (2) with tie-rod.
  • Page 227 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM STEERING [3] DISASSEMBLING AND ASSEMBLING (1) Power Steering Cylinder Adaptor and Tie-rod 1. Remove the cylinder hose adaptors (4), (6). 2. Remove the tie-rods (2), (8) from piston rod (7). 3. Remove the cylinder holder (1) and internal snap ring (3).

  • Page 228: Servicing

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM STEERING [4] SERVICING Steering Cylinder I.D. 1. Measure the steering cylinder I.D. with a cylinder gauge. 2. If the cylinder I.D. exceed the allowable limit, replace the cylinder barrel. 40.000 to 40.062 mm Factory spec.
  • Page 229 HYDRAULIC SYSTEM KiSC issued 08, 2019 A...
  • Page 230 MECHANISM CONTENTS 1. HYDRAULIC CIRCUIT .................. 5-M1 2. HYDRAULIC PUMP ..................5-M2 3. CONTROL VALVE ..................5-M3 4. FLOW PRIORITY VALVE ................5-M6 5. RELIEF VALVE ..................... 5-M7 6. HYDRAULIC CYLINDER ................5-M9 7. HYDRAULIC BLOCK TYPE OUTLET............5-M10 8. MOWER LINKAGE ..................5-M11 KiSC issued 08, 2019 A...

  • Page 231: Hydraulic Circuit

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM HYDRAULIC SYSTEM 1. HYDRAULIC CIRCUIT (1) Power Steering Controller (5) Backhoe Control Valve (9) Flow Priority Valve (12) Hydraulic Transmission (2) Front Loader Control Valve (6) PTO Clutch (10) Oil Filter (13) Oil Strainer...

  • Page 232: Hydraulic Pump

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM HYDRAULIC SYSTEM 2. HYDRAULIC PUMP The hydraulic pump is composed of the casing (1), cover (4), side plate (3), and two spur gears (drive gear (5) and driven gear (2)) that are in mesh.

  • Page 233: Control Valve

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM HYDRAULIC SYSTEM 3. CONTROL VALVE This position control valve is located under the hydraulic cylinder. This control valve is mechanically connected to the position control lever. Since the feedback rod is not equipped to the lift arm, the neutral position adjustment is adjusted by controlling the position control lever.
  • Page 234 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM HYDRAULIC SYSTEM  Lift When the control lever is set to the “Lift” position, the spool (4) moves to the right. The oil forced into the control valve flows through P port to C port and the hydraulic cylinder.
  • Page 235 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM HYDRAULIC SYSTEM  Down When the control lever is set to the “Down” position, the spool (4) moves to the left. The oil forced from the P port flows through the gap between the control valve body and the spool to the T1 port.

  • Page 236: Flow Priority Valve

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM HYDRAULIC SYSTEM 4. FLOW PRIORITY VALVE (1) Hydraulic Pump Gear (2) Hydraulic Pump Case (3) Plug (4) Flow Priority Valve (5) Relief Valve EF :EF Port (To 3 Points Hitch Control Circuit) PF :PF Port (To Power...

  • Page 237: Relief Valve

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM HYDRAULIC SYSTEM 5. RELIEF VALVE (1) Hydraulic Pump Gear (2) Hydraulic Pump Case (3) Plug (4) Flow Priority Valve (5) Relief Valve EF :EF Port (To 3 Points Hitch Control Circuit) PF :PF Port (To Power...
  • Page 238 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM HYDRAULIC SYSTEM  Relief Valve Operating (1) Hydraulic Pump Gear (2) Hydraulic Pump Case (3) Plug (4) Flow Priority Valve (5) Relief Valve EF :EF Port (To 3 Points Hitch Control Circuit) PF :PF Port (To Power...

  • Page 239: Hydraulic Cylinder

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM HYDRAULIC SYSTEM 6. HYDRAULIC CYLINDER (1) Lift Arm (5) Piston (9) Back-up Ring P : Pump Port (2) Hydraulic Arm (6) Spring (10) O-ring C : Cylinder Port (3) Hydraulic Arm Shaft (7) Ball...

  • Page 240: Hydraulic Block Type Outlet

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM HYDRAULIC SYSTEM 7. HYDRAULIC BLOCK TYPE OUTLET The hydraulic block type outlet is located on the hydraulic cylinder assembly. This hydraulic block type outlet is provided to take power out from the tractor to operate the hydraulic cylinders on the implement, such as front end loader, front snow blade and so on.

  • Page 241: Mower Linkage

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM HYDRAULIC SYSTEM 8. MOWER LINKAGE (1) Mower Rear Link RH (4) Rear Lift Link LH (7) Lift Arm (10) Lift Lower Boss (2) Lift Pin (5) Cutting Height Adjusting Dial (8) Adjusting Bolt (11) Cam...
  • Page 242 SERVICING CONTENTS 1. TROUBLESHOOTING ..................5-S1 2. SERVICING SPECIFICATIONS ..............5-S2 3. TIGHTENING TORQUES ................5-S3 4. CHECKING, DISASSEMBLING AND SERVICING........5-S4 [1] CHECKING AND ADJUSTING ...............5-S4 (1) Relief Valve..................5-S4 (2) Pump and Priority Valve ..............5-S5 (3) Mower Lift Linkage................5-S7 [2] PREPARATION ..................5-S8 (1) Separating Hydraulic Cylinder ............5-S8 (2) Separating Hydraulic Pump ..............5-S10 [3] DISASSEMBLING AND ASSEMBLING..........5-S14 (1) Hydraulic Cylinder and Control Valve ..........5-S14...

  • Page 243: Troubleshooting

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM HYDRAULIC SYSTEM 1. TROUBLESHOOTING Reference Symptom Probable Cause Solution Page Implement Does Not Control valve broken Replace 5-S14 Rise (No Noise) Control valve improperly assembled Repair 5-S14 Relief valve spring damaged Replace 5-S4 Spool sticks...

  • Page 244: Servicing Specifications

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM HYDRAULIC SYSTEM 2. SERVICING SPECIFICATIONS Item Factory Specification Allowable Limit Relief Valve Setting Pressure 12.3 to 12.7 MPa – 125 to 130 kgf/cm 1778 to 1849 psi Hydraulic Pump Power steering oil 9.5 L/min.

  • Page 245: Tightening Torques

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM HYDRAULIC SYSTEM 3. TIGHTENING TORQUES Tightening torques of screws, bolts and nuts on the table below are especially specified. (For general use screws, bolts and nuts : See page G-8.) Item N·m kgf·m ft-lbs...

  • Page 246: Checking, Disassembling And Servicing

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM HYDRAULIC SYSTEM 4. CHECKING, DISASSEMBLING AND SERVICING [1] CHECKING AND ADJUSTING (1) Relief Valve Relief Valve Setting Pressure 1. Disconnect the hydraulic hose (1). 2. Install the hose and adaptor A and B (3) with pressure gauge (2).

  • Page 247: Pump And Priority Valve

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM HYDRAULIC SYSTEM (2) Pump and Priority Valve Checking Power Steering Oil Flow  IMPORTANT • Use the instruction with the flowmeter when you use the flowmeter. • While testing, do not close the flowmeter loading valve completely.
  • Page 248 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM HYDRAULIC SYSTEM Checking 3-point Hitch Oil Flow  IMPORTANT • Use the instruction with the flowmeter when you use the flowmeter. • While testing, do not close the flowmeter loading valve completely. 1. Remove the hydraulic pipe behind the hydraulic cylinder and fix the flow meter hose and the flow (meter) inlet as shown in the photo.

  • Page 249: Mower Lift Linkage

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM HYDRAULIC SYSTEM (3) Mower Lift Linkage Mower Lift Linkage After reassembling the mower lift linkage, be sure to adjust it as follows. 1. Check the lift arm free play. 2. Loosen the adjusting nut (1) and start the engine.

  • Page 250: Preparation

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM HYDRAULIC SYSTEM [2] PREPARATION • Before proceding this section, disassembling the loader assembling and backhoe . (Refer to section 8 and (1) Separating Hydraulic Cylinder Battery CAUTION • When disconnecting the battery cables, disconnect the negative cable from the battery first.
  • Page 251 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM HYDRAULIC SYSTEM Lever Grips and Fender 1. Disconnect the electric outlet connector (6). 2. Remove the lowering speed adjusting knob (5) and cutting height adjusting dial knob (4). 3. Remove the lever grips (2).

  • Page 252: Separating Hydraulic Pump

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM HYDRAULIC SYSTEM Hydraulic Cylinder Block 1. Disconnect the mower linkage (1). 2. Remove the wireharness clamp and wireharness (3) move to the front side. 3. Remove the connecting bar (2). 4. Remove the hydraulic cylinder block mounting bolt.
  • Page 253 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM HYDRAULIC SYSTEM Roll-Over Protective Structures (ROPS) and Seat 1. Disconnect the lead wires from the hazard lights (2), (4) and turn signal lights (3), (5). 2. Remove the ROPS mounting nuts, and remove the ROPS (1).
  • Page 254 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM HYDRAULIC SYSTEM Fender Center Stay 1. Remove the fender bracket (2). 2. Remove the fender center stay (1). (When reassembling) 124 to 147 N·m Fender bracket mounting Tightening torque 12.6 to 15.0 kgf·m bolt 91.2 to 108 ft-lbs...
  • Page 255 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM HYDRAULIC SYSTEM Hydraulic Pump 1. Remove the hydraulic pipe (2) and disconnect the hose (1). 2. Remove the hydraulic pump (3). 8.0 to 9.0 N·m Hydraulic pump mounting 0.82 to 0.91 kgf·m bolt (M6) 6.0 to 6.6 ft-lbs...

  • Page 256: Disassembling And Assembling

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM HYDRAULIC SYSTEM [3] DISASSEMBLING AND ASSEMBLING (1) Hydraulic Cylinder and Control Valve Control Valve 1. Remove the control valve (1). 2. Remove the internal snap ring (4) and draw out the spool (2). (1) Control Valve...
  • Page 257 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM HYDRAULIC SYSTEM Hydraulic Piston 1. Inject the compressed air into the hydraulic cylinder, and take out the hydraulic piston (1). (When reassembling) • Take care not to damage the O-ring (3) and backup ring (2).

  • Page 258: Mower Lift Linkage

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM HYDRAULIC SYSTEM (2) Mower Lift Linkage Disassembling Mower Linkage (1) Mower Rear Link, RH (2) Lift Link Rear, RH (3) Cutting Height Adjusting Dial Knob (4) Cutting Height Adjusting (5) Lift Arm, LH (6) Link Adjusting Bolt...

  • Page 259: Servicing

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM HYDRAULIC SYSTEM [4] SERVICING (1) Hydraulic Pump Clearance between Tip of Gear Tooth and Casing 1. Measure the gear O.D. with an outside micrometer. 2. Measure the casing I.D. with a cylinder gauge and calculate the clearance.

  • Page 260: Hydraulic Cylinder

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM HYDRAULIC SYSTEM (2) Hydraulic Cylinder Hydraulic Cylinder Bore 1. Check the cylinder internal surface for scoring or damage. 2. Measure the cylinder I.D. with a cylinder gauge. 3. If the measurement exceeds the allowable limit, replace the hydraulic cylinder block.
  • Page 261 ELECTRICAL SYSTEM KiSC issued 08, 2019 A...
  • Page 262 MECHANISM CONTENTS 1. WIRING DIAGRAM ..................6-M1 2. STARTING SYSTEM ..................6-M4 [1] MAIN SWITCH POSITION..............6-M4 [2] SAFETY SWITCH ................... 6-M6 [3] OPERATOR PRESENCE CONTROL (OPC) ........6-M8 3. CHARGING SYSTEM ................... 6-M9 [1] ELECTRICAL CIRCUIT ................6-M9 [2] IC REGULATOR (3P CONNECTOR TYPE)........6-M10 4.
  • Page 263 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ELECTRICAL SYSTEM 1. WIRING DIAGRAM (TYPE 1 : WITHOUT OPC TIMER) Oil Pressure Battery Charge Glow Lamp Blinker (L) Ground Lamp Blinker (R) Lamp Ignition (Switched Power) Illumination Fuel Sensor SignaL Hour and Tach.

  • Page 264: Wiring Diagram

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ELECTRICAL SYSTEM WIRING DIAGRAM (TYPE 2 : WITH OPC TIMER) Battery Charge Oil Pressure Glow Lamp Blinker (L) Ground Lamp Blinker (R) Lamp Ignition (Switched Power) Illumination Fuel Sensor SignaL Hour and Tach. Water Temperature Sensor Signal...
  • Page 265 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ELECTRICAL SYSTEM Color of Wiring W ..White WR ... White / Red BW ..Black / White R ... Red WY ... White / Yellow BR ..Black / Red L ... Blue RB ....

  • Page 266: Starting System

    "No Fuel Injection" position and stops the engine. The BX24 tractor equipped the operator presence control (OPC) system which automatically stops the engine when operator stands from the seat while shifting the PTO clutch lever and range gear shift lever...
  • Page 267 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ELECTRICAL SYSTEM  Type 2 : With OPC Timer (1) Fuse (6) HST Neutral (11) Alternator (15) Fuel Pump (2) Seat (7) Main Switch (12) Glow Lamp (16) Solenoid (3) Seat Turn Over (8) Slow Blow Fuse...

  • Page 268: Safety Switch

    There is one type of safety switch, normally closed type. Normally closed type switch is electrically closed in normal condition. Safety switches adopted in BX24 tractor operates as sensor detecting and transmitting the position of HST pedal, PTO lever, independent PTO lever, and seat to engine stop solenoid.
  • Page 269 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ELECTRICAL SYSTEM Lever / Pedal Position, Engine Condition and Switch Condition Lever / Pedal Position Engine Condition HST Pedal Independant PTO PTO Shift Lever Operator’s Seat Seat Reverse Engine Engine Neutral switch; Lever Switch;...

  • Page 270: Operator Presence Control (Opc)

    ELECTRICAL SYSTEM [3] OPERATOR PRESENCE CONTROL (OPC) The BX24 Tractor equips operator presence control (OPC) system which automatically stops the engine when operator stands up from the operator’s seat while shifting the PTO lever or the speed control pedal. Tractor without the OPC timer stops quickly and tractor with the OPC timer stops in approximately one second when standing up from the seat.

  • Page 271: Charging System

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ELECTRICAL SYSTEM 3. CHARGING SYSTEM [1] ELECTRICAL CIRCUIT (1) Illumination Light (3) Fuse (5) Slow Blow Fuse (7) Alternator (2) Battery Charge Lamp (4) Main Switch (6) Battery (8) Frame Earth The charging system supplies electric power for various electrical devices and also charges the battery while the engine runs.

  • Page 272: Ic Regulator (3P Connector Type)

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ELECTRICAL SYSTEM [2] IC REGULATOR (3P CONNECTOR TYPE) 3P connector is connected to the IC regulator. 3P connector consists of three leads, Sb (Sky Blue) lead (1), RY (Red / Yellow) lead (2), and WR (White / Red) lead (3).

  • Page 273: Lighting System

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ELECTRICAL SYSTEM 4. LIGHTING SYSTEM (1) Illumination Light (7) Water Temperature Gauge (13) Oil Pressure Switch (18) Main Switch (2) Oil Pressure Lamp (8) Fuel Gauge (14) Flasher Unit (19) Slow Blow Fuse (3) Glow Lamp (9) Tail Light (12.8W)

  • Page 274: Gauges

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ELECTRICAL SYSTEM 5. GAUGES [1] ELECTRICAL CIRCUIT (1) Hour and Tachometer (4) Thermo Unit (6) Fuse (8) Battery (2) Water Temperature Gauge (5) Fuel Sensor (7) Main Switch (9) Frame Earth (3) Fuel Gauge The fuel quantity is indicated by the fuel gauge.

  • Page 275: Hour And Tachometer

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ELECTRICAL SYSTEM [2] HOUR AND TACHOMETER The electrical hour meter and tachometer is equipped on the meter panel. This meter indicates the operated hours when the main switch is turned to “ON” position. After starting the engine, this meter indicates the present engine revolution.

  • Page 276: Water Temperature Gauge

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ELECTRICAL SYSTEM [4] WATER TEMPERATURE GAUGE Water temperature gauge is located on the meter panel board. The water temperature gauge and the thermo unit are connected by the wiring. The water temperature gauge detects the resistance from the thermo unit.

  • Page 277: Others

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ELECTRICAL SYSTEM 6. OTHERS [1] DC OUTLET DC outlet is equipped to this machine. The capacity of the DC outlet is 12 V / 120 W. The electrical device as a CD player, a mobile phone battery charger can be used to the DC outlet.
  • Page 278 SERVICING CONTENTS 1. TROUBLESHOOTING ..................6-S1 2. SERVICING SPECIFICATIONS ..............6-S5 3. TIGHTENING TORQUES ................6-S6 4. CHECKING, DISASSEMBLING AND SERVICING........6-S7 [1] CHECKING AND ADJUSTING ...............6-S7 (1) Battery....................6-S7 (2) Main Switch..................6-S8 (3) Starter ....................6-S10 (4) Glow Plug..................6-S10 (5) Safety Switch ..................6-S11 (6) Operator Presence Control (OPC) Switch ........6-S13 (7) Fuel Pump..................6-S15 (8) Engine Stop Solenoid ...............6-S15 (9) Timer Relay..................6-S15...
  • Page 279 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ELECTRICAL SYSTEM 1. TROUBLESHOOTING FUSE AND WIRING Reference Symptom Probable Cause Solution Page All Electrical Battery discharged or defective Recharge or replace G-17 Equipments Do Not Battery positive cable disconnected or Repair or replace –...
  • Page 280 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ELECTRICAL SYSTEM OPERATOR PRESENCE CONTROL (OPC) Reference Symptom Probable Cause Solution Page Engine Does Not Solenoid fuse blown (15A) Replace G-31 Stop Timer replay defective Replace 6-S15 Engine stop solenoid defective Replace 6-S15 PTO shift lever switch defective...
  • Page 281 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ELECTRICAL SYSTEM LIGHTING SYSTEM Reference Symptom Probable Cause Solution Page Head Light Does Not Fuse blown (15 A) Replace G-31 Light Bulb blown Replace G-31 Wiring harness disconnected or improperly Repair or Replace –...
  • Page 282 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ELECTRICAL SYSTEM LIGHTING SYSTEM (Continued) Reference Symptom Probable Cause Solution Page Glow Lamp Does Not Battery discharged or defective Recharge or Replace G-17 Light When Main Slow blow fuse blown Replace G-31 Switch Is in Pre-heat...

  • Page 283: Servicing Specifications

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ELECTRICAL SYSTEM 2. SERVICING SPECIFICATIONS Item Factory Specification Allowable Limit Battery Voltage More than 12 V – Potential Less than 0.1 V – Difference Approx. 0.9  Glow Plug Resistance – Seat Stay to Seat Reverse Switch...

  • Page 284: Tightening Torques

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ELECTRICAL SYSTEM 3. TIGHTENING TORQUES Tightening torques of screws, bolts and nuts on the table below are especially specified. (For general use screws, bolts and nuts : See page G-8.) Item N·m kgf·m ft-lbs...

  • Page 285: Checking, Disassembling And Servicing

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ELECTRICAL SYSTEM 4. CHECKING, DISASSEMBLING AND SERVICING [1] CHECKING AND ADJUSTING CAUTION • To avoid accidental short circuit, be sure to attach the positive cable to the positive terminal before the negative cable is attached to the negative terminal.

  • Page 286: Main Switch

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ELECTRICAL SYSTEM Battery Specific Gravity 1. Check the specific gravity of the electrolyte in each cell with a hydrometer. 2. When the electrolyte temperature differs from that at which the hydrometer was calibrated, correct the specific gravity reading following the formula mentioned in (Reference).
  • Page 287 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ELECTRICAL SYSTEM Main Switch Continuity 1) Main Switch Key at OFF Position 1. Set the main switch OFF position. 2. Measure the resistance with an ohmmeter across the B terminal and the ACC terminal, B terminal and ST terminal, B terminal and G terminal.

  • Page 288: Starter

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ELECTRICAL SYSTEM (3) Starter Motor Test CAUTION • Secure the starter to prevent if from jumping up and down while testing the motor. 1. Disconnect the battery negative cable from the battery. 2. Disconnect the battery positive cable and the leads from the starter.

  • Page 289: Safety Switch

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ELECTRICAL SYSTEM Glow Plug Continuity 1. Disconnect the lead from the glow plugs. 2. Measure the resistance with an ohmmeter between the glow plug terminal and the chassis. 3. If 0 ohm is indicated, the screw at the tip of the glow plug and the housing are short-circuited.
  • Page 290 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ELECTRICAL SYSTEM HST Neutral Switch Continuity 1. Remove the right rear wheel. 2. Remove the HST neutral switch (1). 3. Measure the resistance with an ohmmeter across the HST neutral switch terminals. 4. If the resistance values specified below are not indicated, the safety switch is faulty.

  • Page 291: Operator Presence Control (Opc) Switch

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ELECTRICAL SYSTEM (6) Operator Presence Control (OPC) Switch Seat Switch and Seat Reverse Switch Continuity Check 1. Disconnect the 2P connectors (2) from the seat switch (1) and the seat reverse switch (3). 2. Remove the seat switch and the seat reverse switch.
  • Page 292 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ELECTRICAL SYSTEM Checking OPC Timer 1. Remove the OPC timer. (The OPC timer is located under the fender center stay.) 2. Connect the jumper leads across the battery terminal and the Red / White terminal (2), and across the battery positive terminal and the Yellow terminal (3).

  • Page 293: Fuel Pump

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ELECTRICAL SYSTEM (7) Fuel Pump Connector Voltage 1. Disconnect the 2P connector from the fuel pump. 2. Turn the main switch key to the “ON” position, and measure the voltage with a voltmeter between the connector terminals.

  • Page 294: Charging System

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ELECTRICAL SYSTEM Test of Timer Relay 1. Remove the timer relay from the tractor. 2. Connect jumper leads across the battery positive terminal and the timer relay terminal 3, and across the battery positive terminal and the timer relay terminal 4.
  • Page 295 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ELECTRICAL SYSTEM Slip Ring 1. Check the slip ring for score. 2. If scored, correct with an emery paper or on a lathe. 3. Measure the O.D. of slip ring with vernier calipers. 4. If the measurement is less than the allowable limit, replace it.

  • Page 296: Combination Switch

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ELECTRICAL SYSTEM (12) Combination Switch Combination Switch 1. Remove the meter panel, and disconnect the combination switch connector. 2. Remove the combination switch (1) and perform the following checks 1) to 8). (1) Combination Switch...
  • Page 297 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ELECTRICAL SYSTEM 3) Head Light Switch Continuity when Setting Switch at “ON” Position 1. Set the light switch to the ON position. 2. Measure the resistance with an ohmmeter across the red / yellow lead (1) to the orange lead (4) and the red / yellow lead (1) to the yellow lead (3).
  • Page 298 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ELECTRICAL SYSTEM 5) Turn Signal Light Switch Continuity when Setting Switch Knob “RIGHT” Position 1. Set the turn signal switch knob to the RIGHT position. 2. Measure the resistance with an ohmmeter across the green lead (1) and red / white lead (2), and across to the green lead (1) and green / white lead (3).
  • Page 299 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ELECTRICAL SYSTEM 7) Hazard Switch Continuity when Setting Switch Knob at “OFF” Position 1. Set the hazard switch knob to the OFF position. 2. Measure the resistance with an ohmmeter across the black / blue lead (1) and blue / white lead (2).
  • Page 300 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ELECTRICAL SYSTEM Flasher Unit 1. Remove the under panel. 2. Disconnect the coupler (2) from flasher unit. 3. Measure the voltage with a voltmeter across the terminal h and terminal c or chassis. 4. If the voltage differs from the battery voltage, the wiring harness is faulty.
  • Page 301 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ELECTRICAL SYSTEM Charge Lamp (Charging Circuit) 1. Disconnect the 3P connector from the alternator after turning the main switch OFF. 2. Turn the main switch ON and connect a jumper lead from the wiring harness connector terminal (White / Red) to the chassis.

  • Page 302: Gauge

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ELECTRICAL SYSTEM Engine Oil Pressure Switch Continuity 1. Disconnect the lead (2) from the engine oil pressure switch (1). 2. Measure the resistance with an ohmmeter across the switch terminal and the chassis. 3. If 0 ohm is not indicated in the normal state, the switch is faulty.
  • Page 303 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ELECTRICAL SYSTEM Hour Meter and Tachometer 1. Disconnect the 3P connector (4) from the IC regulator (9) located in the alternator (5) after starting the engine. 2. Measure the voltage with a voltmeter across the hour meter terminal (6) and the alternator body when the hour meter or tachometer does not indicated the proper value.

  • Page 304: Dc Outlet

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ELECTRICAL SYSTEM (14) DC Outlet DC Outlet Connector Voltage and DC Outlet Continuity 1. Disconnect the connector from the DC outlet. And turn the main switch “ON”. 2. Measure the voltage with a voltmeter across the connector red / blue lead and the chassis.

  • Page 305: Alternator

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ELECTRICAL SYSTEM Magnet Switch 1. Remove the drive end frame (1) mounting screws. 2. Take out the overrunning clutch (2), ball (3), spring (4), gears (5), rollers (6) and retainer (7). (When reassembling) • Apply grease to the gear teeth of the gears (5) and overrunning clutch (2), and ball (3).

  • Page 306: Servicing

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ELECTRICAL SYSTEM [3] SERVICING (1) Starter Overrunning Clutch 1. Inspect the pinion for wear or damage. 2. If there is any defect, replace the overrunning clutch assembly. 3. Check that the pinion turns freely and smoothly in the overrunning direction and does not slip in the cranking direction.
  • Page 307 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ELECTRICAL SYSTEM Brush Holder 1. Check the continuity across the brush holder and the holder support with an ohmmeter. 2. If it conducts, replace the brush holder. W1017672 Armature Coil 1. Check the continuity across the commutator and armature coil core with an ohmmeter.

  • Page 308: Alternator

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ELECTRICAL SYSTEM (2) Alternator Bearing 1. Check the bearing for smooth rotation. 2. If it does not rotate smoothly, replace it. W1019790 Alternator Components 1. When the alternator does not generator or does not charge the battery, replace the alternator as an assembly.
  • Page 309 ROTARY MOWER KiSC issued 08, 2019 A...
  • Page 310 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM SAFETY INSTRUCTIONS SAFETY INSTRUCTIONS SAFETY DECALS The following safety decals are installed on the mower. If a decal becomes damaged, illegible or is not on the mower, replace it. The decal part number is listed in the parts list.
  • Page 311 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM SAFETY INSTRUCTIONS KiSC issued 08, 2019 A...
  • Page 312 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TERMINOLOGY TERMINOLOGY [RCK60B-23BX, RCK54-23BX] (1) Front Anti-scalp Roller (5) Discharge Deflector (8) Outer Blade (Right) (11) Outer Blade (Left) (2) Belt Cover (Left) (6) Universal Joint (9) Center Anti-scalp Roller (12) Rear Anti-scalp Roller...
  • Page 313 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM TERMINOLOGY [RCK54P-23BX] (1) Front Anti-scalp Roller (4) Belt Cover (Right) (7) Deck (10) Center Blade (2) Belt Cover (Left) (5) Discharge Deflector (8) Outer Blade (Right) (11) Outer Blade (Left) (3) Gear Box (6) Universal Joint...
  • Page 314 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM SPECIFICATIONS SPECIFICATIONS Model RCK60B-23BX RCK54P-23BX RCK54-23BX Quick-Joint, Parallel linkage Mounting method Self-balance suspended Suspended linkage linkage Adjustment of cutting height Dial gauge Cutting width 1524 mm (60 in.) 1375 mm (54 in.) 1372 mm (54 in.) Cutting height 25 to 102 mm (1.0 to 4.0 in.)
  • Page 315 MECHANISM CONTENTS 1. POWER TRANSMISSION ................7-M1 2. LIFTING MECHANISM ................. 7-M2 3. SELF-BALANCER SYSTEM ................. 7-M3 KiSC issued 08, 2019 A...
  • Page 316 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ROTARY MOWER 1. POWER TRANSMISSION (1) 19T Bevel Gear (2) 16T Bevel Gear (4) Universal Joint (9) Mower Belt (RCK54-23BX,RCK54P-23BX) (RCK54-23BX, RCK54P- (5) Mid-PTO Shaft (10) Blade Shaft 18T Bevel Gear 23BX) (6) Center Blade...
  • Page 317 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ROTARY MOWER 2. LIFTING MECHANISM (1) Front Link (3) Lift Link (5) Rear Lift Link (LH) (6) Lift Arm (2) Rear Link (4) Rear Lift Link (RH) The lifting of mower is performed by the hydraulic system installed on the tractor.
  • Page 318 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ROTARY MOWER 3. SELF-BALANCER SYSTEM This system reduces the stepped differences in cutting height when mowing rolling terrain.  Self-Balancer 1. The mower deck is held in place via the balancer plate (4) and the support by the rear link (1), (2).
  • Page 319 SERVICING CONTENTS 1. GENERAL .......................7-S1 [1] MOWER IDENTIFICATION ..............7-S1 [2] LUBRICANTS ...................7-S2 [3] TIGHTENING TORQUES (GENERAL USE SCREWS, BOLT AND NUTS) .......................7-S3 [4] MEINTENANCE CHECK LIST..............7-S4 [5] CHECK AND MAINTENANCE..............7-S5 (1) Check Points of Daily or Each Use .............7-S5 (2) Check Point of Initial 50 Hours............7-S7 (3) Check Point of Every 150 Hours............7-S7 (4) Check Point of Every 2 Years .............7-S7 [6] SETTING UP MOWER ................7-S8...

  • Page 320: General

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ROTARY MOWER 1. GENERAL [1] MOWER IDENTIFICATION When contacting your local KUBOTA distributor, always specify mower serial number. (1) Mower Serial Number W1015293 7-S1 KiSC issued 08, 2019 A...

  • Page 321: Lubricants

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ROTARY MOWER [2] LUBRICANTS Place Capacity Lubricants 0.36 L RCK60B-23BX 0.38 U.S.qts RCK54-23BX 0.32 lmp.qts SAE 90 gear oil Gear Box (API Service GL-5 gear oil) 0.15 L RCK54P-23BX 0.16 U.S.qts 0.13 lmp.qts Greasing...

  • Page 322: Tightening Torques (General Use Screws, Bolt And Nuts)

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ROTARY MOWER [3] TIGHTENING TORQUES (GENERAL USE SCREWS, BOLT AND NUTS) Screws, bolts and nuts whose tightening torques are not specified in this Workshop Manual should be tightened according to the table below. Indication on top of...

  • Page 323: Meintenance Check List

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ROTARY MOWER [4] MEINTENANCE CHECK LIST To keep the mower working in good condition as well as to avoid any accident and trouble, carry out periodic inspection and maintenance. Check the following points before use.

  • Page 324: Check And Maintenance

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ROTARY MOWER [5] CHECK AND MAINTENANCE (1) Check Points of Daily or Each Use Retightening Mower Blade Screw CAUTION • To avoid injury, always handle the mower blade with care. 1. Dismount the mower and turn it over to expose the mower blades.
  • Page 325 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ROTARY MOWER Greasing Spindle Shafts, Belt Tension Pivot and Tension Pulley 1. Grease the grease nipples (1), (2) of the spindle shafts if the amount of grease is insufficient. [A] RCK60B-23BX, RCK54-23BX (1) Grease Nipple (Splindle Shaft)

  • Page 326: Check Point Of Initial 50 Hours

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ROTARY MOWER (2) Check Point of Initial 50 Hours Changing Gear Box Oil CAUTION • Be sure to stop the engine and remove the key before changing the oil. [RCK60B-23BX, RCK54-23BX] 1. Dismount the mower from the tractor, and place the mower on level ground.

  • Page 327: Setting Up Mower

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ROTARY MOWER [6] SETTING UP MOWER Assembling Mower 1. Place the mower on blocks as illustrated. Turn the anti-scalp rollers sideways and attach to the arms of the deck at the upper position with clevis pins and snap rings.
  • Page 328 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ROTARY MOWER Universal Joint 1. Pull back the coupler (3) of the universal joint (2). 2. Push the universal joint (2) onto the mid-PTO shaft (1), until the coupler locks. 3. Slide the universal joint back and forward to make sure the universal joint is locked securely.
  • Page 329 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ROTARY MOWER Front Link 1. Hook the front link (1) to the front bracket groove (2) as shown in the figure. (Reference) • Make sure the length (L) of the front link (1) is 47 mm (1.85 in.).

  • Page 330: Mower Adjustment

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ROTARY MOWER [7] MOWER ADJUSTMENT CAUTION • Park the tractor on a firm, flat and level surface and set the parking brake. • Stoop the engine, remove the key, and allow the blades to stop before making adjustments.
  • Page 331 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ROTARY MOWER Adjusting Front and Rear Cutting Height 1. Tire pressure must be correct. 2. Make sure the level of the mower blades is adjusted as shown below. Then tighten the lock nuts securely.
  • Page 332 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ROTARY MOWER Adjusting Left and Right Cutting Height 1. Tire pressure must be correct. 2. Operate the hydraulic control lever (2) rearward to raise the mower deck to the highest position. 3. Stop the engine and remove the key.
  • Page 333 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ROTARY MOWER Adjusting Self-Balance Suspended Linkage (RCK60B-23BX Only) 1. Check the length (L) of balancer spring (2). 2. If the length (L) is not within the factory specification, adjust the length of balancer spring (2) with lock nut (3).
  • Page 334 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ROTARY MOWER Cutting Height DANGER • Never operate the mower in transport position. IMPORTANT  • (for self-balance suspended linkage) To reduce the stepped difference in cutting height when mowing rolling terrain, follow the procedure below.

  • Page 335: Troubleshooting

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ROTARY MOWER 2. TROUBLESHOOTING Reference Symptom Probable Cause Solution Page Blade Does Not Turn Mid-PTO system malfunctioning Check transmission – Broken mower belt Replace mower belt 7-S19 Blade Speed Is Slow Loosen mower belt...

  • Page 336: Servicing Specifications

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ROTARY MOWER 3. SERVICING SPECIFICATIONS Item Factory Specification Allowable Limit Input Shaft (without Mower Belt) Turning Force Less than 117.7 N – 12.0 kgf 26.5 lbs Turning Torque Less than 1.47 N·m – 0.15 kgf·m 1.08 ft-lbs...

  • Page 337: Tightening Torques

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ROTARY MOWER 4. TIGHTENING TORQUES Tightening torques of screws, bolts and nuts on the table below are especially specified. (For general use screws, bolts and nuts: See page 7-S3.) [RCK54-23BX, RCK60B-23BX] Item N·m kgf·m...

  • Page 338: Checking, Disassembling And Servicing

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ROTARY MOWER 5. CHECKING, DISASSEMBLING AND SERVICING [1] CHECKING AND ADJUSTING Checking Mower Blade 1. Check the cutting edge of mower blade. 2. Sharpen the cutting edges, if the mower blades are as shown in figure (2).

  • Page 339: Disassembling And Assembling

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ROTARY MOWER [2] DISASSEMBLING AND ASSEMBLING Universal Joint and Belt Cover 1. Unscrew the universal joint screw. 2. Remove the universal joint (1). 3. Remove the left and right belt covers (2), (3). (1) Universal Joint...
  • Page 340 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ROTARY MOWER Blade Boss 1. Remove the external snap ring (2). 2. Remove the blade boss (1). (A) RCK54P-23BX (1) Blade Boss (B) RCK54-23BX, RCK60B-23BX (2) External Snap Ring W1012871 Gear Box and Mower Belt 1.
  • Page 341 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ROTARY MOWER Disassembling Gear Box (RCK54-23BX, RCK60B-23BX) 1. Unscrew the drain plug (19), and drain the gear box oil. 2. Remove the center pulley (23) with a puller, and remove the feather key (22) on the bevel gear shaft.
  • Page 342 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ROTARY MOWER Center Pulley Holder 1. Unscrew the center pulley holder screws (1), (15) / center pulley nut (5), (11). 2. Remove the upper oil seal (6) and lower oil seal (4). 3. Remove the internal snap ring (3) and ball bearing (2).
  • Page 343 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ROTARY MOWER Outer Pulley and Blade Shaft (To be continued) 1. Unscrew the outer pulley mounting nut (21), and remove the outer pulley (27). 2. Unscrew the pulley holder mounting nut (29), and remove the left pulley holder (34).
  • Page 344 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ROTARY MOWER Outer Pulley and Blade Shaft (Continued) 1. Unscrew the blade side pulley mounting nut (11), and remove the blade side pulley (12). 2. Unscrew the pulley holder mounting bolts (18), and separate the right pulley side holder (5) from the mower deck.
  • Page 345 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ROTARY MOWER [3] SERVICING Turning Torque of Pinion Shaft 1. Remove the mower belt, and reassemble the gear box to the mower deck. 2. Wind a string around the pinion shaft and set a spring balance (or push-pull gauge) to the tip of the string, and then slowly pull the spring balance horizontally to measure the turning force.
  • Page 346 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM ROTARY MOWER Backlash between Bevel Gears 1. Remove the gear box cap (3). 2. Place fuses the bevel gear (2) on the input shaft (5). 3. Turn the input shaft (5). 4. Take out the fuses, and measure the thickness of fuses with an outside micrometer.
  • Page 347 FRONT LOADER KiSC issued 08, 2019 A...
  • Page 348 MECHANISM CONTENTS 1. HYDRAULIC CIRCUIT .................. 8-M1 2. CONTROL VALVE ASSEMBLY..............8-M2 [1] STRUCTURE ................... 8-M2 [2] OPERATION .................... 8-M3 3. BOOM CYLINDER AND BUCKET CYLINDER........8-M10 KiSC issued 08, 2019 A...

  • Page 349: Hydraulic Circuit

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM FRONT LOADER 1. HYDRAULIC CIRCUIT (1) Bucket Control Valve (2) Bucket Cylinder (3) Boom Cylinder (4) Boom Control Valve (5) Control Valve Assembly P : From Pump P.B. :To 3-Point Hydraulic System T : To Tank...

  • Page 350: Control Valve Assembly

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM FRONT LOADER 2. CONTROL VALVE ASSEMBLY [1] STRUCTURE P : P Port (From Pump) A1 : A1 Port B1 : B1 Port (1) Inlet and Outlet Section T : T Port (To Tank) A2 : A2 Port...

  • Page 351: Operation

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM FRONT LOADER [2] OPERATION  Neutral (5) P.B. Passage 1 T : T Port (To Tank) B1 : B1 Port (1) Boom Control Section (6) P.B. Passage 2 P : P Port (From Pump)
  • Page 352 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM FRONT LOADER  Up P : P Port (From Pump) B1 : B1 Port (To Boom Cylinder) (1) Boom Control Section (5) Neutral Passage 1 T : T Port (To Tank) P.B. :P.B. Port (To 3 Hitch)
  • Page 353 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM FRONT LOADER  Down P : P Port (From Pump) B1 : B1 Port (1) Boom Control Section (5) Neutral Passage 1 T : T Port (To Tank) (From Boom Cylinder) (2) Bucket Control Section...
  • Page 354 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM FRONT LOADER  Floating P : P Port (From Pump) A1 : A1 Port (1) Boom Control Section (5) Detent Mechanism T : T Port (To tank) B1 : B1 Port (2) Bucket Control Section (6) Neutral Passage 1 P.B.
  • Page 355 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM FRONT LOADER  Roll-back (6) P.B. Passage 2 P : P Port (From Pump) B2 : B2 Port (1) Boom Control Section T : T Port (To Tank) (To Bucket Cylinder) (2) Bucket Control Section (7) Load Check Valve (3) P.B.
  • Page 356 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM FRONT LOADER  Dump 1 (6) P.B. Passage 2 P : P Port (From Pump) A2 : A2 Port (1) Boom Control Section T : T Port (To Tank) (To Bucket Cylinder) (2) Bucket Control Section (7) Load Check Valve (3) P.B.
  • Page 357 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM FRONT LOADER  Dump 2 (6) P.B. Passage 2 P : P Port (From Pump) A2 : A2 Port (1) Boom Control Section T : T Port (To Tank) (To Bucket Cylinder) (2) Bucket Control Section (7) Load Check Valve (3) P.B.

  • Page 358: Boom Cylinder And Bucket Cylinder

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM FRONT LOADER 3. BOOM CYLINDER AND BUCKET CYLINDER (1) Nut (3) Cylinder Tube (4) Head (5) Piston Rod (2) Piston Both boom cylinder and bucket cylinder consists of a head (4), cylinder tube (3), piston rod (5), piston (2), and other parts as shown in the figure above.
  • Page 359 SERVICING CONTENTS 1. GENERAL .......................8-S1 [1] IDENTIFICATION..................8-S1 [2] GENERAL PRECAUTION ...............8-S1 [3] LUBRICANTS ...................8-S2 [4] MAINTENANCE CHECK LIST..............8-S2 [5] CHECK AND MAINTENANCE..............8-S2 (1) Check Points of Each Use or Daily .............8-S2 (2) Check Points of Every 10 Hours ............8-S3 2. TROUBLESHOOTING ..................8-S4 3.

  • Page 360: General

    Screws, bolts and nuts should be replaced in their original positions to prevent reassembly errors. • When special tools are required, use genuine KUBOTA tools. Special tools which are not used frequently should be made according to the drawings provided.

  • Page 361: Lubricants

    Moly Ep Type grease NOTE  • * KUBOTA SUPER UDT Fluid....KUBOTA original transmission hydraulic fluid W1010650 [4] MAINTENANCE CHECK LIST To keep the machine working in good condition as well as to avoid any accident and trouble, carry out periodic inspection and maintenance.

  • Page 362: Check Points Of Every 10 Hours

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM FRONT LOADER (2) Check Points of Every 10 Hours Greasing 1. Inject grease in all grease fitting with a hand grease gun. W1011132 Lubricating 1. Lubricate joints of control lever linkage. W1011274 8-S3 KiSC issued 08, 2019 A...

  • Page 363: Troubleshooting

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM FRONT LOADER 2. TROUBLESHOOTING Reference Symptom Probable Cause Solution Page Boom Does Not Rise Control valve malfunctioning Repair or replace 8-S11 Boom cylinder defective Repair or replace 8-S12 Control lever linkage defective Repair or replace...

  • Page 364: Servicing Specifications

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM FRONT LOADER 3. SERVICING SPECIFICATIONS Item Factory Specification Allowable Limit Piston Rod Bend – 0.25 mm 0.0098 in. W1013874 8-S5 KiSC issued 08, 2019 A...

  • Page 365: Tightening Torques

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM FRONT LOADER 4. TIGHTENING TORQUES [1] GENERAL USE SCREWS, BOLTS AND NUTS Screws, bolts and nuts whose tightening torques are not specified in this Workshop Manual should be tightened according to the table below.

  • Page 366: Dismounting And Mounting Front Loader From Tractor .8-S7

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM FRONT LOADER 5. DISMOUNTING MOUNTING FRONT LOADER FROM TRACTOR IMPORTANT  • When dismounting the loader, park the tractor on flat and hard ground, apply the parking brake. • When starting the engine or using the hydraulic control valve, always sit in the operator’s seat.

  • Page 367: Mounting Front Loader To Tractor

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM FRONT LOADER [2] MOUNTING FRONT LOADER TO TRACTOR Side Frame and Hoses 1. Slowly drive the tractor between the loader side frames until the rear portion of both side frames touches the main frames as shown.

  • Page 368: Checking, Disassembling And Servicing

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM FRONT LOADER 6. CHECKING, DISASSEMBLING AND SERVICING [1] CONTROL VALVE (1) Checking and Adjusting Relief Valve Setting Pressure NOTE  • The relief valve is not installed on this model. However the relief valve of the tractor hydraulic system is used as the relief valve of the front loader.

  • Page 369: Control Valve

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM FRONT LOADER Control Valve 1. Remove the loader frame (6). 2. Disconnect the cruise control rod (2). 3. Disconnect the frame loader control rods (3). 4. Remove the brake spring. 5. Remove the arms (4) from spool end.
  • Page 370 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM FRONT LOADER Disassembling Control Valve (1) Dust Seal (2) Dust Seal (3) Load Check Valve (4) Spring (5) O-ring (6) Plug (7) Bolt (8) Plug (9) Seat (10) Spring (11) Ball (12) Stopper (13) Ring...

  • Page 371: Disassembling And Assembling

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM FRONT LOADER [2] BUCKET, BOOM AND HYDRAULIC CYLINDERS (1) Disassembling and Assembling Bucket and Bucket Cylinder 1. Remove the pins (4), the lower pin (1) and remove the bucket (3). 2. Disconnect the hydraulic hoses from the bucket cylinder (2).
  • Page 372 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM FRONT LOADER Piston Rod Assembly 1. Drain hydraulic oil from the cylinder, and secure the tube end of the cylinder in a vise. 2. Unscrew the cylinder head (1) with the adjustable gland nut wrench (4).
  • Page 373 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM FRONT LOADER Piston Seal and O-ring 1. Remove the piston seal (2) and O-ring (3) from the piston (1). IMPORTANT  • When installing the O-ring (3) and piston seal (2) to the piston (1), use the slide jig and correcting jig as shown in the figure.

  • Page 374: Disassembling And Assembling

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM FRONT LOADER (2) Servicing Piston Rod Bend 1. Place piston rod on V blocks. 2. Set a dial indicator on the center of the rod. 3. Turn the piston rod and read the dial indicator.
  • Page 375 BACKHOE KiSC issued 08, 2019 A...
  • Page 376 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM SAFETY INSTRUCTIONS SAFETY INSTRUCTIONS SAFETY DECALS The following safety decals are installed on the machine. If a decal becomes damaged, illegible or is not on the machine, replace it. The decal part number is listed in the parts list.
  • Page 377 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM BACKHOE TERMINONOGY BACKHOE TERMINONOGY (1) Backhoe Bucket (6) Dipperstick Cylinder (11) Swing Cylinder (15) Joystick Control (2) Bucket Teeth (7) Boom (12) Stabilizer (16) Stabilizer Control (3) Bucket Link (8) Boom Cylinder (13) Stabilizer Pad...
  • Page 378 Angle of Departure per SAE J1234 20.1 deg. Leveling Angle 11 deg. Swing Arc 140 deg. 60  – NOTE:The specifications are taken with KUBOTA BX24 tractor. (Tire size : Front 18  8.5-10, Rear 26  12.00-12) W1028417 KiSC issued 08, 2019 A...
  • Page 379 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM SPECIFICATIONS  Digging Force (Per SAE J49) Model BT601 With bucket cylinder 8610 N (1936 lbs) With dipperstick cylinder 5209 N (1171 lbs) W1027852  Cycle Time (Seconds) Boom cylinder, extend Boom cylinder, retract Swing cylinder, from 90 °...
  • Page 380 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM SPECIFICATIONS  Lift Capacity (Per SAE J31) [A] Rated Lift Capacity (Over End) - kg (lbs) Lift capacites shown are 87 % of maximum lift force, according to SAE definition. W1029646 KiSC issued 08, 2019 A...
  • Page 381 MECHANISM CONTENTS 1. HYDRAULIC SYSTEM.................. 9-M1 [1] HYDRAULIC CIRCUIT................9-M1 [2] CONTROL VALVE .................. 9-M2 (1) Structure .................... 9-M2 (2) Operation ................... 9-M3 (3) Overload Relief Valve ..............9-M16 [3] HYDRAULIC CYLINDER ..............9-M18 KiSC issued 08, 2019 A...

  • Page 382: Hydraulic System

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM BACKHOE 1. HYDRAULIC SYSTEM [1] HYDRAULIC CIRCUIT A1 :A1 Port B1 :B1 Port P : Pump Port (1) Bucket Cylinder A2 :A2 Port B2 :B2 Port T : Tank Port (2) Dipperstick Cylinder A3 :A3 Port B3 :B3 Port P.B.

  • Page 383: Control Valve

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM BACKHOE [2] CONTROL VALVE (1) Structure A1 :A1 Port B1 :B1 Port (1) Inlet Section (8) Outlet Section P : Pump Port A2 :A2 Port B2 :B2 Port (2) Bucket Control Valve T : Tank Port...

  • Page 384: Operation

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM BACKHOE (2) Operation  Neutral P : Pump Port B1 : B1 Port (1) Inlet Section (8) Outlet Section T : Tank Port B2 : B2 Port (2) Bucket Control Valve (9) Load Check Valve P.B.
  • Page 385 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM BACKHOE  Bucket (Roll-back) P : Pump Port A1 : A1 Port (1) Bucket Cylinder (5) Spool T : Tank Port (From Bucket Cylinder) (2) Bucket Control Valve (6) Inlet Section P.B. :Power Beyond Port...
  • Page 386 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM BACKHOE  Bucket (Dump) P : Pump Port A1 : A1 Port (1) Bucket Cylinder (5) Spool T : Tank Port (To Bucket Cylinder) (2) Bucket Control Valve (6) Inlet Section P.B. :Power Beyond Port...
  • Page 387 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM BACKHOE  Dipperstick (Crowd) P : Pump Port A2 : A2 Port (1) Dipperstick Cylinder (5) Spool T : Tank Port (From Dipperstick Cylinder) (2) Dipperstick Control Valve (6) Inlet Section P.B. :Power Beyond Port...
  • Page 388 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM BACKHOE  Dipperstick (Extend) P : Pump Port A2 : A2 Port (1) Dipperstick Cylinder (5) Spool T : Tank Port (To Dipperstick Cylinder) (2) Dipperstick Control Valve (6) Inlet Section P.B. :Power Beyond Port...
  • Page 389 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM BACKHOE  Stabilizer RH (Shrink) P : Pump Port A3 : A3 Port (1) Stabilizer Cylinder RH (5) Spool T : Tank Port (From Stabilizer RH (2) Stabilizer RH Control Valve (6) Inlet Section P.B.
  • Page 390 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM BACKHOE  Stabilizer RH (Extend) P : Pump Port A3 : A3 Port (1) Stabilizer Cylinder RH (5) Spool T : Tank Port (To Stabilizer RH Cylinder) (2) Stabilizer RH Control Valve (6) Inlet Section P.B.
  • Page 391 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM BACKHOE  Stabilizer LH (Shrink) P : Pump Port A4 : A4 Port (1) Stabilizer Cylinder LH (5) Spool T : Tank Port (From Stabilizer LH Cylinder) (2) Stabilizer LH Control Valve (6) Inlet Section P.B.
  • Page 392 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM BACKHOE  Stabilizer LH (Extend) P : Pump Port A4 : A4 Port (1) Stabilizer Cylinder LH (5) Spool T : Tank Port (To Stabilizer LH Cylinder) (2) Stabilizer LH Control Valve (6) Inlet Section P.B.
  • Page 393 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM BACKHOE  Boom (Up) P : Pump Port A5 : A5 Port (1) Boom Cylinder (5) Spool T : Tank Port (From Boom Cylinder) (2) Boom Control Valve (6) Inlet Section P.B. :Power Beyond Port...
  • Page 394 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM BACKHOE  Boom (Down) P : Pump Port A5 : A5 Port (1) Boom Cylinder (5) Spool T : Tank Port (To Boom Cylinder) (2) Boom Control Valve (6) Inlet Section P.B. :Power Beyond Port...
  • Page 395 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM BACKHOE  Swing (Right) P : Pump Port A6 : A6 Port (1) Swing Cylinder (5) Spool T : Tank Port (From Swing Cylinder) (2) Swing Control Valve (6) Inlet Section P.B. :Power Beyond Port...
  • Page 396 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM BACKHOE  Swing (Left) P : Pump Port A6 : A6 Port (1) Swing Cylinder (5) Spool T : Tank Port (To Swing Cylinder) (2) Swing Control Valve (6) Inlet Section P.B. :Power Beyond Port...

  • Page 397: Overload Relief Valve

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM BACKHOE (3) Overload Relief Valve Overload relief valve in this control valve is a combination valve combining a relief operation and anti- cavitation operation.  Relief Operation When the control valve is in the neutral position, both cylinder ports of control valve are blocked by the spool.
  • Page 398 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM BACKHOE [When the actuator port pressure is higher than the setting] When the cylinder port HP has reached the set pressure of the piston spring (5), the pressure oil in the spring chamber A opens the pilot poppet (4) and flows through the drain passage into the tank passage.

  • Page 399: Hydraulic Cylinder

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM BACKHOE [3] HYDRAULIC CYLINDER (1) Rod (3) Cylinder Tube (5) Nut (6) Tube End (2) Head (4) Piston Bucket, dipperstick, boom, swing, and stabilizer cylinder consists of cylinder head (2), piston rod (1), cylinder tube (3), piston (4) and other parts as shown in the figure above.
  • Page 400 SERVICING CONTENTS 1. GENERAL .......................9-S1 [1] BACKHOE IDENTIFICATION ..............9-S1 [2] GENERAL PRECAUTION ...............9-S1 [3] LUBRICANTS ...................9-S2 [4] MAINTENANCE CHECK LIST..............9-S2 [5] CHECK AND MAINTENANCE..............9-S2 (1) Check Points of Each Use or Daily .............9-S2 (2) Check Points of Every 10 Hours ............9-S3 2.

  • Page 401: General

    Screws, bolts and nuts should be replaced in their original positions to prevent reassembly errors. • When special tools are required, use genuine KUBOTA tools. Special tools which are not used frequently should be made according to the drawings provided.

  • Page 402: Lubricants

    Check that the oil level is between the two notches. 3. If the level is too low, replenish new oil. IMPORTANT  • Use only KUBOTA SUPER UDT fluid. Use of other oils may damage the transmission or hydraulic system. Refer to “LUBRICANTS, FUEL AND COOLANT”. (See page G-7.)

  • Page 403: Check Points Of Every 10 Hours

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM BACKHOE (2) Check Points of Every 10 Hours Greasing 1. Inject grease all grease nipples with a hand grease gun. W1011760 9-S3 KiSC issued 08, 2019 A...
  • Page 404 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM BACKHOE 2. TROUBLESHOOTING Reference Symptom Probable Cause Solution Page All Functions Quick coupler disconnected Reconnect – Inoperative (Front Loader Is OK) All Functions Insufficient transmission fluid Replenish 9-S2 Including Front Relief valve spring damaged...

  • Page 405: Servicing Specifications

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM BACKHOE 3. SERVICING SPECIFICATIONS Item Factory Specification Allowable Limit Boom Cylinder Rod Pin to Cylinder Clearance 0.060 to 0.185 mm 1.0 mm Bushing 0.002 to 0.007 in. 0.0394 in. O.D. 29.970 to 30.000 mm –...
  • Page 406 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM BACKHOE Item Factory Specification Allowable Limit Swing Cylinder Rod Pin to Cylinder Clearance 0.108 to 0.259 mm 1.0 mm Bushing 0.004 to 0.010 in. 0.0394 in. O.D. 24.816 to 25.000 mm – 0.977 to 0.984 in.

  • Page 407: Tightening Torques Of Screws, Bolt And Nuts On The

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM BACKHOE 4. TIGHTENING TORQUES [1] GENERAL USE SCREWS, BOLTS AND NUTS Screws, bolts and nuts whose tightening torques are not specified in this Workshop Manual should be tightened according to the table below. American standard cap screws with UNC or UNF threads...

  • Page 408: Dismounting And Mounting

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM BACKHOE 5. DISMOUNTING AND MOUNTING [1] DISMOUNTING THE BACKHOE CAUTION • When starting the engine, always sit in the operator’s seat. • When getting off the tractor, make sure that PTO lever is off and range gear shift lever is in neutral. Then set the parking brake.
  • Page 409 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM BACKHOE Mounting Pin 1. Raise the rear wheels slightly with the boom and remove the mounting pins (1). 2. Put the mounting pins (1) in the holes on the step of the backhoe. 3. Slowly raise the boom to disengage the backhoe from the tractor.

  • Page 410: Mounting The Backhoe To Tractor

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM BACKHOE Hydraulic Hoses 1. Slowly release all hydraulic pressure by moving the backhoe hydraulic control levers in all directions. 2. Disconnect the hydraulic hoses in the following manner. 3. Disconnect the inlet, outlet and power beyond hoses from the tractor.
  • Page 411 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM BACKHOE Mounting Pin and Mounting Backhoe IMPORTANT  • Make sure both hoses are firmly connected before starting the engine. WARNING • Do not move the joystick control lever to the swing position. 1. Start the engine.

  • Page 412: Disassembling The Backhoe

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM BACKHOE [3] DISASSEMBLING THE BACKHOE IMPORTANT  • When reassembling the pins, bushings and inner rings, apply slight coat of grease to them. • When tightening the hydraulic hoses, refer to “HYDRAULIC HOSES FITTING AND FLARE PIPES” (Page 8-S7.)
  • Page 413 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM BACKHOE Dipperstick Cylinder, Boom, Boom Cylinder and Hoses 1. Disconnect the hydraulic hoses and remove the dipperstick cylinder (4). 2. Remove the pins (1), (3) and remove the boom cylinder (2). 3. Remove the pin (6) and remove the boom (5).
  • Page 414 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM BACKHOE W1016286 Swing Frame 1. Disconnect the swing cylinder rods (5) from swing frame (4). 2. Remove the swing frame (4) from main frame (1). (When reassembling) • Lock the locking nuts to setting bolts at position where the setting bolt may still be rotated.
  • Page 415 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM BACKHOE Lever Support and Valve 1. Remove the cover (1). 2. Disconnect the control lever rods (3) of valve side. 3. Remove the lever support (2) with control levers. 4. Disconnect the hydraulic hoses.

  • Page 416: Checking, Disassembling And Servicing

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM BACKHOE 6. CHECKING, DISASSEMBLING AND SERVICING [1] CONTROL VALVE (1) Checking and Adjusting Relief Valve Setting Pressure NOTE  • The relief valve of the tractor hydraulic system is used as a relief valve of the backhoe hydraulic system.
  • Page 417 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM BACKHOE Disassembling Overload Valve (Port Relief Valve) 1. Remove the overload relief valve (1) from the valve housing (3). 2. Separate the all component parts. (When reassembling) • Clean all parts with a suitable solvent, and dry with a lint-free cloth or air.

  • Page 418: Boom, Dipperstick, Bucket, Swing And Stabilizer

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM BACKHOE [2] BOOM, DIPPERSTICK, BUCKET, SWING AND STABILIZER CYLINDER (1) Disassembling and Assembling Cylinder Rod Assembly 1. Drain hydraulic oil from the cylinder, and secure the tube end of the cylinder in a vise.

  • Page 419: Cylinder

    BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM BACKHOE Cylinder Adaptor Angle • Connect the cylinder adaptor at their original positions and be sure to connect the adaptor angle as indicated table below. Cylinder Rod Side Bottom Side ±1 ±1 Swing (deg.) (deg.)
  • Page 420 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM BACKHOE Installing O-ring and Piston Seal 1. Place the slide jig (2) on the piston (4). 2. Install the O-ring (3) on the piston using the slide jig. 3. Install the piston seal (1) over the O-ring using the slide jig.
  • Page 421 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM BACKHOE Clearance between Pin and Bushing 1. Measure the pins O.D. with an outside micrometer. 2. Measure the bushings I.D. with a cylinder gauge. 3. If the clearance exceeds the allowable limit, replace pin or bushing.
  • Page 422 BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM BACKHOE Clearance between Pin and Bushing Clearance Factory spec. Allowable limit Boom cylinder rod pin 0.060 to 0.185 mm 1.0 mm and cylinder bushing 0.002 to 0.007 in. 0.0394 in. Dipperstick fulcrum pin 0.140 to 0.180 mm 1.0 mm...
  • Page 423 : Tractor and Agricultural Implement Service Dept. Address 64, Ishizu-Kitamachi, Sakai-Ku, Sakai-City, Osaka, 590-0823, Japan Phone +81- 72-241-1129 +81- 72-245-2484 E-mail : kbt_g.ag-sv@kubota.com Editor : Harvester, Transplanter and Farm Machinery Products Service Dept. Address 64, Ishizu-Kitamachi, Sakai-Ku, Sakai-City, Osaka, 590-0823, Japan Phone +81- 72-241-6554 +81-...

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