Kubota BX1860 Workshop Manual
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Kubota BX1860 Workshop Manual

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WORKSHOP MANUAL
TRACTOR,ROTARY MOWER,
FRONT LOADER
BX1860,BX2360,BX2660,
RCK48-18BX,RCK54-23BX,
RCK60B-23BX,RCK48P-18BX,
RCK54P-23BX,LA203,LA243
KiSC issued 06, 2009 A

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steve
March 11, 2025

where is neutral so i can push mower out of garage

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1 comments:
Mr. Anderson
March 11, 2025

The neutral position on a Kubota BX1860 mower is adjusted using the neutral adjuster and lock screw. To set it, the engine should be started, the engine kept at maximum revolution, and the range shift lever shifted to the "Hi" position. The locking screw should then be loosened to adjust the neutral position.

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Summary of Contents for Kubota BX1860

  • Page 1 WORKSHOP MANUAL TRACTOR,ROTARY MOWER, FRONT LOADER BX1860,BX2360,BX2660, RCK48-18BX,RCK54-23BX, RCK60B-23BX,RCK48P-18BX, RCK54P-23BX,LA203,LA243 KiSC issued 06, 2009 A...
  • Page 2 TO THE READER This Workshop Manual has been prepared to provide servicing personnel with information on the mechanism, service and maintenance of KUBOTA Tractor BX1860, BX2360, BX2660, KUBOTA Rotary Mower RCK48-18BX, RCK54-23BX, RCK60B- 23BX, RCK48P-18BX, RCK54P-23BX and KUBOTA Front Loader LA203, LA243. It is divided into three parts, “General”, “Mechanism”...
  • Page 3 SAFETY INSTRUCTIONS BX1860, BX2360, BX2660, RCK48(P)-18BX, BCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 4 SAFETY INSTRUCTIONS BX1860, BX2360, BX2660, RCK48(P)-18BX, BCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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.
  • Page 5 SAFETY INSTRUCTIONS BX1860, BX2360, BX2660, RCK48(P)-18BX, BCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM AVOID FIRES • Fuel is extremely flammable and explosive under certain conditions. Do not smoke or allow flames or sparks in your working area. • To avoid sparks from an accidental short circuit, always disconnect the battery negative cable first and connect it last.
  • Page 6 SAFETY INSTRUCTIONS BX1860, BX2360, BX2660, RCK48(P)-18BX, BCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM PREPARE FOR EMERGENCIES • Keep a first aid kit and fire extinguisher handy at all times. • Keep emergency numbers for doctors, ambulance service, hospital and fire department near your telephone.

  • Page 7: Safety Decals

    SAFETY INSTRUCTIONS BX1860, BX2360, BX2660, RCK48(P)-18BX, BCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 SAFETY INSTRUCTIONS BX1860, BX2360, BX2660, RCK48(P)-18BX, BCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM KiSC issued 06, 2009 A...
  • Page 9 SAFETY INSTRUCTIONS BX1860, BX2360, BX2660, RCK48(P)-18BX, BCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM KiSC issued 06, 2009 A...
  • Page 10 SAFETY INSTRUCTIONS BX1860, BX2360, BX2660, RCK48(P)-18BX, BCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM KiSC issued 06, 2009 A...

  • Page 11: Specifications

    SPECIFICATIONS BX1860, BX2360, BX2660, RCK48(P)-18BX, BCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM SPECIFICATIONS Model BX1860 BX2360 BX2660 PTO power 10.2 kW (13.7 HP)* 13.2 kW (17.7 HP)* 14.5 kW (19.5 HP)* Maker KUBOTA Model D722-E3-BX-2 D902-E3-BX-2 D1005-E3-BX Type Indirect Injection, vertical, water-cooled, 4-cycle diesel Number of cylinders 67 ×...

  • Page 12: Traveling Speeds

    TRAVELING SPEEDS BX1860, BX2360, BX2660, RCK48(P)-18BX, BCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM TRAVELING SPEEDS (At rated engine rpm) BX2360 Model BX1860 BX2660 24 × 12.00 – 12 26 × 12.00 – 12 Tire size (Rear) Range gear shift lever km/h km/h 0 to 5.5...
  • Page 13 DIMENSIONS BX1860, BX2360, BX2660, RCK48(P)-18BX, BCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM DIMENSIONS KiSC issued 06, 2009 A...
  • Page 14 GENERAL KiSC issued 06, 2009 A...

  • Page 15: Table Of Contents

    GENERAL CONTENTS 1. TRACTOR IDENTIFICATION ................. G-1 [1] SERIAL NUMBER..................G-1 [2] CYLINDER NUMBER ................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 ....................

  • Page 16: Tractor Identification

    G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 1. TRACTOR IDENTIFICATION [1] SERIAL NUMBER 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...

  • Page 17: General Precautions

    G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 2. GENERAL PRECAUTIONS • During disassembly, carefully arrange removed parts in a clean area to prevent confusion later. Screws, bolts and nuts should be installed in their original position to prevent reassembly errors.

  • Page 18: Handling Precautions For Electrical Parts And Wiring

    G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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.
  • Page 19 G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM • 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 20: Battery

    G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM [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 21: Handling Of Circuit Tester

    G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM • 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...

  • Page 22: Lubricants, Fuel And Coolant

    G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 4. LUBRICANTS, FUEL AND COOLANT Capacity Place Lubricants, fuel and coolant BX1860 BX2360 BX2660 25.0 L No. 2-D diesel fuel Fuel tank 6.6 U.S.gals No. 1-D diesel fuel if temperature is below −10 °C (14 °F)
  • Page 23 • The oil used to lubricate the transmission is also used as hydraulic fluid. To insure proper operation of the hydraulic system and to complete lubrication of the transmission, it is important that a multi-grade transmission fluid is used in this system. We recommend the use of KUBOTA UDT or SUPER UDT fluid for optimum protection and performance.

  • Page 24: Tightening Torques

    G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 25: American Standard Screws, Bolts And Nuts With Unc Or Unf Threads

    G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM [3] AMERICAN STANDARD SCREWS, BOLTS AND NUTS WITH UNC OR UNF THREADS SAE GR.5 SAE GR.8 Grade Unit Nominal N·m kgf·m lbf·ft N·m kgf·m lbf·ft Diameter 5/16 23.1 to 27.7 2.35 to 2.83...

  • Page 26: 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 27: Check And Maintenance

    G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 28: Check Points Of Initial 50 Hours

    G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM [2] CHECK POINTS OF INITIAL 50 HOURS Changing Engine Oil CAUTION To avoid personal injury : • Be sure to stop the engine and remove the key before changing the oil.
  • Page 29 G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Replacing Transmission Oil Filter CAUTION • Allow engine to cool down sufficiently, oil can be hot and can burn. 1. Remove the oil filter. 2. Put a film of clean transmission oil on the rubber seal of the new filter.

  • Page 30: Check Points Of Every 50 Hours

    G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM [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 31 G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 32: Check Points Of Every 100 Hours

    G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM [4] CHECK POINTS OF EVERY 100 HOURS Checking Battery Condition DANGER To avoid the possibility of battery explosion: For the refillable type battery, follow the instructions below. • Do not use or charge the refillable type battery if the fluid level is below the LOWER (lower limit level) mark.
  • Page 33 G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 34 G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 35 G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Checking Fuel Lines and Fuel Filter 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 36 G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 37: Check Points Of Every 200 Hours

    G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 38 G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 39: Check Points Of Every 400 Hours

    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 40: Check Point Of Every 500 Hours

    G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 41: Check Points Of Every 2 Years

    G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM [12] CHECK POINTS OF EVERY 2 YEARS Replacing Radiator Hoses (Water Pipes) 1. Replace the hoses and clamps. Refer to “Checking Radiator Hoses and Hose Clamps”. (See page G-22.)
  • Page 42 G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 43 G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Flush 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 44 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 45: Others

    G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM [13] 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 46 G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Replacing Light Bulb 1. Head lights: Take the bulb out of the light body and replace with a new one. 2. Other lights: Detach the lens and replace the bulb.

  • Page 47: Special Tools

    G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 48 G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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.
  • Page 49 G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 50 G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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.
  • Page 51 G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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.

  • Page 52: Special Tools For Tractor

    G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM [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 53 G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Independent 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, BX60 series, BX24 and BX25 tractor.
  • Page 54 G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Disassembling and Assembling Stand (1/2) Application: Use to disassembling transaxle assembly and to assembling transaxle assembly. φ 9 mm (φ 0.35 in.) 3 Holes 30.5 to 31.5 mm (1.21 to 1.24 in.) 225 mm (8.86 in.)
  • Page 55 G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 56: Tires

    G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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.

  • Page 57: Wheel Tread

    G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM [2] WHEEL TREAD (1) Front Wheels Front tread can not be adjusted. IMPORTANT • Do not turn discs to obtain wider tread. NOTE • Use the tapered bolts for wheels with beveled or tapered holes.

  • Page 58: Rear Wheels

    G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM (2) Rear Wheels Rear 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 59: Ballast

    G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM [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 60: Rear Ballast

    G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM (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 61: 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 62 G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Implement Remarks BX1860 BX2360 BX2660 Max. Cutting Width 1370 mm 1520 mm (60 in.) (54 in.) Mid-Mount Max.Weight 95 kg (210 lbs) 115 kg (254 lbs) 140 kg (309 lbs) Max.
  • Page 63 ENGINE KiSC issued 06, 2009 A...
  • Page 64 NOTICE Regarding engine mechanism information, please refer ENGINE MECHANISM WSM (Code No. 9Y021-01876). KiSC issued 06, 2009 A...
  • Page 65 (1) Cylinder Head and Valves ..............1-S41 (2) Timing Gears, Camshaft and Governor Gear ........1-S49 (3) Piston and Connecting Rod ..............1-S53 (4) Crankshaft..................1-S57 (5) Cylinder.....................1-S65 (6) Oil Pump (BX1860, BX2360) ............1-S66 (7) Oil Pump (BX2660) ................1-S67 KiSC issued 06, 2009 A...

  • Page 66: Troubleshooting

    ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 –...
  • Page 67 ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Reference Symptom Probable Cause Solution Page Either White or Blue Excessive engine oil Reduce to specified G-13 Exhaust Gas Is level Observed Piston ring and cylinder worn or stuck Repair or replace...
  • Page 68 ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Reference Symptom Probable Cause Solution Page Low Oil Pressure Engine oil insufficient Replenish Oil strainer clogged Clean 1-S33 Oil filter clogged Replace G-13 Relief valve stuck with dirt Clean 1-S19...

  • Page 69: Servicing Specifications

    ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 2. SERVICING SPECIFICATIONS [1] BX1860, BX2360 ENGINE BODY Item Factory Specification Allowable Limit Valve Clearance (Cold) 0.145 to 0.185 mm – 0.00571 to 0.00728 in. Compression Pressure 2.85 to 3.23 MPa 2.26 MPa...
  • Page 70 ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 0.0017 in. 0.0059 in. Rocker Arm Shaft O.D.
  • Page 71 ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM ENGINE BODY (Continued) Item Factory Specification Allowable Limit Cam Height Intake 26.88 mm 26.83 mm 1.058 in. 1.056 in. Exhaust 26.88 mm 26.83 mm 1.058 in. 1.056 in. Camshaft Journal to Cylinder Block Bore Oil Clearance 0.050 to 0.091 mm...
  • Page 72 ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM ENGINE BODY (Continued) Item Factory Specification Allowable Limit Crankshaft to Crankshaft Bearing 1 Oil Clearance 0.0340 to 0.114 mm 0.20 mm [BX1860] 0.00134 to 0.00448 in. 0.0079 in. Crankshaft O.D.
  • Page 73 ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM ENGINE BODY (Continued) Item Factory Specification Allowable Limit Crankshaft Side Clearance 0.15 to 0.31 mm 0.50 mm 0.0059 to 0.012 in. 0.020 in. Cylinder Liner I.D. 67.000 to 67.019 mm 67.150 mm...
  • Page 74 ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM FUEL SYSTEM Item Factory Specification Allowable Limit Injection Pump Injection Timing 0.3360 to 0.3622 rad – (3200 min (rpm)) (19.25 to 20.75°) before T.D.C. Pump Element Fuel Tightness – 13.73 MPa 140.0 kgf/cm...

  • Page 75: Bx2660

    ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM [2] BX2660 ENGINE BODY Item Factory Specification Allowable Limit Valve Clearance (Cold) 0.145 to 0.185 mm – 0.00571 to 0.00728 in. Compression Pressure 3.73 to 4.11 MPa 2.26 MPa 38.0 to 42.0 kgf/cm 23.0 kgf/cm...
  • Page 76 ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM ENGINE BODY (Continued) Item Factory Specification Allowable Limit Rocker Arm Shaft to Rocker Arm Clearance 0.016 to 0.045 mm 0.10 mm 0.00063 to 0.0017 in. 0.0039 in. Rocker Arm Shaft O.D.
  • Page 77 ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM ENGINE BODY (Continued) Item Factory Specification Allowable Limit Cam Height Intake 28.80 mm 28.75 mm 1.134 in. 1.132 in. Exhaust 29.00 mm 28.95 mm 1.142 in. 1.140 in. Camshaft Journal to Cylinder Block Bore Oil Clearance 0.050 to 0.091 mm...
  • Page 78 ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM ENGINE BODY (Continued) Item Factory Specification Allowable Limit Crankshaft to Crankshaft Bearing 2 Oil Clearance 0.034 to 0.095 mm 0.20 mm 0.0014 to 0.0037 in. 0.0079 in. Crankshaft Journal O.D.
  • Page 79 ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM COOLING SYSTEM Item Factory Specification Allowable Limit Fan Belt Tension 7.0 to 9.0 mm / 98 N – 0.28 to 0.35 in. / 98 N (10 kgf, 22 lbf) Thermostat Valve Opening 69.5 to 72.5 °C...

  • Page 80: Tightening Torques

    ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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-9.)
  • Page 81 ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Engine Section Item Size x Pitch N·m kgf·m lbf·ft Cylinder head cover screw M6 x 1.0 9.81 to 11.2 1.00 to 1.15 7.24 to 8.31 [BX1860, BX2360] Cylinder head cover screw [BX2660] M6 x 1.0...

  • Page 82: Checking, Disassembling And Servicing

    ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 4. CHECKING, DISASSEMBLING AND SERVICING [1] CHECKING AND ADJUSTING (1) Engine Body Compression Pressure 1. Run the engine until it is warmed up. 2. Stop the engine. 3. Remove the air cleaner, the muffler and all glow plugs (or nozzles).
  • Page 83 ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 84: Lubricating System

    ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM (2) Lubricating System Engine Oil Pressure 1. Remove the engine oil pressure switch, and set an oil pressure tester. 2. Start the engine. After warming up, measure the oil pressure of both idling and rated speeds.

  • Page 85: Cooling System

    ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM (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 lbf).
  • Page 86 ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM CAUTION • When removing the radiator cap, wait at least ten minutes after the engine has stopped and cooled down. Otherwise, hot water may gush out, scalding nearby people. Radiator Cap Air Leakage 1.

  • Page 87: Fuel System

    ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM (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 88 ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Fuel Tightness of Pump Element 1. Remove the engine stop solenoid. 2. Remove the injection pipes and glow plugs. 3. Install the injection pump pressure tester to the injection pump.
  • Page 89 ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 90 ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 91: Disassembling And Assembling

    ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM [2] DISASSEMBLING AND ASSEMBLING (1) Separating Engine Draining Engine Oil 1. Start and warm up the engine for approx. 5 minutes. 2. Place an oil pan underneath the engine. 3. Remove the drain plug (1) to drain oil.
  • Page 92 ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Bonnet and Under Cover 1. Open the bonnet (1), and then loosen the knob bolts and pull forward to remove the under cover (2). 2. Disconnect the connectors (3) for head light and remove the bonnet bracket (4) with bonnet.
  • Page 93 ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Separating Engine from Front Axle 1. Disconnect the ground cable. 2. Disconnect the front coupling (1). 3. Remove the engine mounting nuts (3). 4. Remove the engine support (4). 5. Hook the engine and separate the engine assembly with the radiator from the frame.

  • Page 94: Removing Outer Parts

    ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM (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 95 ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Injection Pipes 1. Loosen the screws to the pipe clamp (1). 2. Detach the injection pipes (2). (When reassembling) • Send compressed air into the pipes to blow out dust. Then, reassemble the pipes in the reverse order.
  • Page 96 ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Rocker Arm and Push Rod 1. Remove the rocker arm bracket screw. [BX1860, BX2360] Remove the rocker arm bracket nut. [BX2660] 2. Detach the rocker arm assembly (1). 3. Remove the push rods (2).
  • Page 97 ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Tappets 1. Remove the tappets (1) from the crankcase. (When reassembling) • Visually check the contact between tappets and cams for proper rotation. If defect is found, replace tappets. • Before installing the tappets, apply engine oil thinly around them.

  • Page 98: Gear Case And Timing Gears

    ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM (4) Gear Case and Timing Gears Oil Pan and Oil Strainer 1. Remove the oil pan mounting screws. 2. Remove the oil pan (2). 3. Remove the oil strainer (1).
  • Page 99 ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Gear Case 1. Remove the fuel feed pump. 2. Remove the gear case. (When reassembling) • Grease thinly to the oil seal, and install it, ensuring the lip does not come off.
  • Page 100 ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Injection Pump 1. Disconnect the start spring (4) on the thrust lever side (5). 2. Align the control rack pin (2) with the notch (1) on the crankcase, and remove the injection pump (3).
  • Page 101 ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Cam Gear, Idle Gear 1, 2 and Governor Gear 1. Remove the idle gear 1 (4). 2. Remove the fuel camshaft stopper (7). 3. Draw out the fuel cam gear (1) with fuel camshaft (8).

  • Page 102: Piston And Connecting Rod

    ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM (5) Piston and Connecting Rod Connecting Rod 1. Remove the connecting rod cap. (When reassembling) • Align the marks (a) with each other. (Face the marks toward the injection pump.) •...
  • Page 103 ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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).

  • Page 104: Flywheel And Crankshaft

    ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM (6) Flywheel and Crankshaft Flywheel 1. Secure the flywheel to keep it from turning, using a flywheel stopper. 2. Remove all flywheel screws (1) and then remove the flywheel (2).
  • Page 105 ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Crankshaft Assembly 1. Remove the main bearing case screw 2 (1). 2. Pull out the crankshaft assembly. IMPORTANT • Take care to protect crankshaft bearing 1 from scratches, caused by the crank gear, etc.. (Wrap the gear in vinyl tape, etc.)

  • Page 106: Servicing

    ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM [3] SERVICING (1) Cylinder Head and Valves 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.
  • Page 107 ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Cylinder Head Flaw 1. Prepare an air spray red check. 2. Clean the surface of the cylinder head with detergent (2). 3. Spray the cylinder head surface with the red permeative liquid (1).
  • Page 108 ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Clearance between Valve Stem and Valve Guide 1. Remove carbon from the valve guide section. 2. Measure the valve stem O.D. with an outside micrometer. 3. Measure the valve guide I.D. with a small hole gauge, and calculate the clearance.
  • Page 109 ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Valve Seating 1. Coat the valve face lightly with prussian blue and put the valve on its seat to check the contact. 2. If the valve does not seat all the way around the valve seat or the valve contact is less than 70 %, correct the valve seating as follows.
  • Page 110 ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 111 ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Free Length and Tilt of Valve Spring 1. Measure the free length (B) of valve spring with vernier calipers. If the measurement is less than the allowable limit, replace it.
  • Page 112 ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Oil Clearance between Rocker Arm and Rocker Arm Shaft 1. Measure the rocker arm shaft O.D. with an outside micrometer. 2. Measure the rocker arm I.D. with an inside micrometer, and then calculate the oil clearance.
  • Page 113 ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Oil Clearance between Tappet and Tappet Guide Bore 1. Measure the tappet O.D. with an outside micrometer. 2. Measure the I.D. of the tappet guide bore with a cylinder gauge, and calculate the oil clearance.

  • Page 114: Timing Gears, Camshaft And Governor Gear

    ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM (2) Timing Gears, Camshaft and Governor Gear Timing Gear Backlash 1. Set a dial indicator (lever type) with its tip on the gear tooth. 2. Move the gear to measure the backlash, holding its mating gear.
  • Page 115 ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Idle Gear 1 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.
  • Page 116 ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Cam Height 1. Measure the height of the cam at its highest point with an outside micrometer. 2. If the measurement is less than the allowable limit, replace the camshaft.
  • Page 117 ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Oil Clearance between Idle Gear 1 Shaft and Idle Gear Bushing 1. Measure the idle gear shaft O.D. with an outside micrometer. 2. Measure the idle gear bushing I.D. with an inside micrometer, and calculate the oil clearance.

  • Page 118: Piston And Connecting Rod

    ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM (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 119 ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Replacing Small End Bushing (When removing) 1. Press out the used bushing using a small end bushing replacing tool. (See page “SPECIAL TOOLS”.) (When installing) 1. Clean a new small end bushing and bore, and apply engine oil to them.
  • Page 120 ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Piston Ring Gap 1. Insert the piston ring into the lower part of the cylinder (the least worn out part) with a piston. 2. Measure the ring gap with a thickness gauge.
  • Page 121 ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Clearance between Piston ring and Piston Ring Groove 1. Clean the rings and the ring grooves, and install each ring in its groove. 2. Measure the clearance between the ring and the groove with a feeler gauge or depth gauge.

  • Page 122: Crankshaft

    ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM (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 123 ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Crankshaft Alignment 1. Support the crankshaft with V blocks on the surface plate at both end journals. 2. Set a dial indicator with its tip on the intermediate journal. 3. Measure the crankshaft alignment.
  • Page 124 ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Oil Clearance between Crankpin and Crankpin Bearing (BX2660) 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 125 ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Oil Clearance between Crankshaft Journal and Crankshaft Bearing 1 (BX1860, BX2360) 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 126 ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Oil Clearance between Crankshaft Journal and Crankshaft Bearing 1 (BX2660) 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 127 ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Oil Clearance between Crankshaft Journal and Crankshaft Bearing 2 and Crankshaft Bearing 3 (BX1860, BX2360) 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 128 ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Oil Clearance between Crankshaft Journal and Crankshaft Bearing 2 and Crankshaft Bearing 3 (BX1860, BX2360) (Continued) (Reference) • Undersize crankshaft bearing 2 and 3 (0.20 mm (0.0079 in.)) Models Bearing...
  • Page 129 ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Oil Clearance between Crankshaft Journal and Crankshaft Bearing 2 (Crankshaft Bearing 3) (BX2660) 1. Put a strip of plastigage on the center of the journal. 2. Install the bearing case and tighten the baring case screws 1 to the specified torque, and remove the bearing case again.

  • Page 130: Cylinder

    ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM (5) Cylinder Cylinder Wear 1. Measure the I.D. of the cylinder 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 131: Oil Pump (Bx1860, Bx2360)

    ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Correcting Cylinder (BX2660) 1. When the cylinder is worn beyond the allowable limit, bore and hone it to the specified dimension. 76.500 to 76.519 mm Factory spec. 3.0119 to 3.0125 in.

  • Page 132: Oil Pump (Bx2660)

    ENGINE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM (7) Oil Pump (BX2660) Rotor Lobe Clearance 1. Measure the clearance between lobes of the inner rotor and the outer rotor with a feeler gauge. 2. If the clearance exceeds the factory specifications, replace the oil pump rotor assembly.
  • Page 133 TRANSAXLE KiSC issued 06, 2009 A...
  • Page 134 MECHANISM CONTENTS 1. STRUCTURE ....................2-M1 2. TRAVELING 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 135: Structure

    TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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...

  • Page 136: Traveling System

    TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 2. TRAVELING 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...

  • Page 137: Oil Flow

    TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM (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...
  • Page 138 TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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...
  • Page 139 TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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...
  • Page 140 TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 141 TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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...

  • Page 142: Hst Control Linkage

    TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM (3) HST Control Linkage The speed control pedal (5) and the trunnion arm are linked with the HST pedal link (10) and the speed change rod (11). As the front of the pedal is depressed, the swashplate connected to the trunnion arm (2) rotates and forward travelling speed increases.

  • Page 143: Speed Set Linkage

    TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM (4) Speed Set Linkage Speed Set (1) Speed Set Rod (2) Brake Pedal (3) Speed Control Pedal (4) Parking Brake Lock Pedal (5) Cruise Lock (6) Cruise Lock (7) Cruise Arm...
  • Page 144 TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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...

  • Page 145: Range Gear Shift Section

    TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM [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 146: Differential Gear Section

    TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM [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...

  • Page 147: Differential Lock

    TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM (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...

  • Page 148: Brake Section

    TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM [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 149: Pto System

    TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 3. PTO SYSTEM [1] PTO CLUTCH AND VALVE (1) PTO Select Gear (5) PTO Clutch Valve A : From HST Pump Shaft C : From Power Steering (2) PTO Clutch Pack...
  • Page 150 TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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...
  • Page 151 TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 152: Mid And Rear Pto Section

    TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM [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 153: Others

    TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 154 SERVICING CONTENTS 1. 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-S24 (1) Hydrostatic Transmission..............2-S24 (2) Hydraulic Cylinder................2-S30 (3) Transaxle Shafts ................2-S31 (4) Assembling Shafts ................2-S39 [4] SERVICING ....................2-S41...

  • Page 155: Troubleshooting

    TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 1. TROUBLESHOOTING HYDROSTATIC TRANSMISSION Reference Symptom Probable Cause Solution Page System Will Not Oil level is low Check oil level or fill G-24 Operate in Either oil to proper level...
  • Page 156 TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM HYDROSTATIC TRANSMISSION (Continued) Reference Symptom Probable Cause Solution Page Loss of Power Oil level is low Check oil level or fill G-24 oil to proper level Speed control pedal linkage defective...
  • Page 157 TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM TRAVELLING GEAR SHIFT SECTION Reference Symptom Probable Cause Solution Page Noise from Transmission oil insufficient Refill 2-S16 Transmission Gear worn or broken Replace – Bearings worn Replace – Gear Slip Out of...
  • Page 158 TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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-S24 Clutch disc or drive plate excessively worn...

  • Page 159: Servicing Specifications

    TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 2. SERVICING SPECIFICATIONS Item Factory Specification Allowable Limit Charge Relief Valve Setting Pressure 0.55 to 0.75 MPa – [Oil temperature at 50 °C, 122 °F] 5.6 to 7.7 kgf/cm 80 to 100 psi...
  • Page 160 TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM (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 0.011 in. 0.016 in. Spiral Bevel Pinion Shaft to Spiral Bevel Backlash 0.10 to 0.30 mm...

  • Page 161: Tightening Torques

    TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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-9.) Item N·m kgf·m...

  • Page 162: Checking, Disassembling And Servicing

    TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 163 TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 164 TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 165 TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 166 TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 167 TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 168 TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Readjustment of Relief Valve (When the HST does not Work Due to its Loose Hexagon Socket Head Screw) IMPORTANT • KUBOTA does not recommend the readjustment of relief valve. KUBOTA recommends with genuine parts.
  • Page 169 TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM PTO Clutch Operating Pressure CAUTION • When checking, park the tractor on flat ground, apply the parking brake. 1. Lift the rear of the tractor and remove the left rear wheel.

  • Page 170: Preparation

    TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM [2] PREPARATION (1) Separating Transaxle Draining Transmission Fluid CAUTION • Be sure to stop the engine before checking and changing the transmission fluid. 1. Place oil pan under the tractor.
  • Page 171 TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Lift Rod and Lower Link 1. Remove the top link (2). 2. Remove the stopper pin (6) and remove the check chain plate (3). 3. Move the bushes (8) to inside.
  • Page 172 TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Seat 1. Disconnect the seat switch connectors. 2. Remove the snap pins(2) to remove the seat (1). (1) Seat (2) Snap Pin W1014409 Speed Control Pedal and Step 1. Remove the valve covers (3).
  • Page 173 TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 lbf·ft...
  • Page 174 TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Fender Bracket, Hitch Plate 1. Remove the hitch plate (2). 2. Remove the parking brake return spring (4) and the fender brackets (1), (3). (When reassembling) • Do not firmly tighten all screws, bolts and nuts until most components are attached.
  • Page 175 TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Transaxle Assembly 1. Remove the differential lock rod (1) and disconnect the mower link (2). 2. Remove the brake rod (4). 3. Disconnect the pipes (3). (If equipped.) 4. Disconnect the connector (5).
  • Page 176 TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 177 TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Speed Control Pedal, HST Damper and Cruise Rod 1. Remove the speed control pedal (1). 2. Remove the rue ring cotter (4). 3. Remove the HST dumper (2). 4. Remove the release arm (7).

  • Page 178: Disassembling And Assembling

    TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM [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 179 TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Oil Cooler Cover 1. Remove the HST front cover. 2. Remove the HST front cover (1) not to damage the oil seal (5). 3. Remove the center section (6). (When reassembling) 1.
  • Page 180 TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Check and High Pressure Relief Valve Plug 1. Remove the check and high pressure relief plug (G 1/2). (When reassembling) 59 to 78 N·m Check and high pressure Tightening torque 6.0 to 8.0 kgf·m...
  • Page 181 TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 182 TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 183 TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 184: Hydraulic Cylinder

    TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM (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 185: Transaxle Shafts

    TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM (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 186 TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 187 TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 188 TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Rear Axle (LH) NOTE • Prepare a specially bent snap ring pillar. 1. Draw out the oil seal with a screw driver. 2. Remove the internal cir-clip from the rear axle case.
  • Page 189 TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 190 TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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).
  • Page 191 TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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.
  • Page 192 TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 193: Assembling Shafts

    TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM (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 194 TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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.

  • Page 195: Servicing

    TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM [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.
  • Page 196 TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 197: Transaxle Case

    TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 198 TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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.
  • Page 199 TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 200 TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 201 TRANSAXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 202: Front Axle

    FRONT AXLE KiSC issued 06, 2009 A...
  • Page 203 MECHANISM CONTENTS 1. STRUCTURE ....................3-M1 2. FRONT WHEEL ALIGNMENT ..............3-M2 KiSC issued 06, 2009 A...
  • Page 204 FRONT AXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 205: Front Wheel Alignment

    FRONT AXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 206 FRONT AXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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.
  • Page 207 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 06, 2009 A...

  • Page 208: Troubleshooting

    FRONT AXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 209: Servicing Specifications

    FRONT AXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 2. SERVICING SPECIFICATIONS Item Factory Specification Allowable Limit Front Wheel Alignment Toe-in 0 to 5 mm – 0 to 0.2 in. Front Axle Rocking Force 49.1 to 117 N –...

  • Page 210: Tightening Torques

    FRONT AXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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-9.) Item N·m...

  • Page 211: Checking, Disassembling And Servicing

    FRONT AXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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)).

  • Page 212: Preparation

    • When re-filling, remove the right and left breather plugs (1). 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.) 2.3 L BX1860 2.4 U.S.qts...
  • Page 213 FRONT AXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 214 FRONT AXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 215: Disassembling And Assembling

    FRONT AXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM [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 216 FRONT AXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Front Gear Case Cover 1. Remove the front gear case mounting screws and remove the front gear case cover (1) with bevel gear (2). (When reassembling) • Apply grease to the O-ring and take care not to damage it.
  • Page 217 FRONT AXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 218 FRONT AXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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).

  • Page 219: Servicing

    FRONT AXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM [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.
  • Page 220 FRONT AXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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.
  • Page 221 FRONT AXLE BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 222 STEERING KiSC issued 06, 2009 A...
  • Page 223 MECHANISM CONTENTS 1. HYDRAULIC CIRCUIT .................. 4-M1 2. STEERING CONTROLLER ................4-M2 3. STEERING CYLINDER................. 4-M3 KiSC issued 06, 2009 A...
  • Page 224 STEERING BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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...
  • Page 225 STEERING BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 226: Steering Cylinder

    STEERING BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 227 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 06, 2009 A...

  • Page 228: Troubleshooting

    STEERING BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 specified oil Hydraulic pump malfunctioning Replace...

  • Page 229: Servicing Specifications

    STEERING BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 2. SERVICING SPECIFICATIONS POWER STEERING BODY Item Factory Specification Allowable Limit Relief Valve Operating 8.34 to 8.82 MPa – Pressure 85.0 to 90.0 kgf/cm 1210 to 1280 psi W1013874 STEERING CYLINDER Steering Cylinder I.D.

  • Page 230: Tightening Torques

    STEERING BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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-9.) Item N·m kgf·m...

  • Page 231: Checking, Disassembling And Servicing

    STEERING BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 232 STEERING BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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...

  • Page 233: Separating Power Steering Cylinder

    STEERING BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM (2) Separating Power Steering Cylinder Bonnet and Under Cover 1. Open the bonnet (1), and then loosen the knob bolts and pull forward to remove the under cover (2). 2. Disconnect the connectors (3) for head light and remove the bonnet bracket (4) with bonnet.
  • Page 234 STEERING BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 235 STEERING BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM [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 236: Servicing

    STEERING BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM [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 237: Hydraulic System

    HYDRAULIC SYSTEM KiSC issued 06, 2009 A...
  • Page 238 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 06, 2009 A...

  • Page 239: Hydraulic Circuit

    HYDRAULIC SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 1. HYDRAULIC CIRCUIT (1) Auxiliary Hydraulic Control (4) 3 Point Hitch System (8) Oil Strainer (12) PTO Clutch Valve Valve Assembly (If equipped) (5) Flow Priority Valve (9) PTO Clutch Relief Valve...

  • Page 240: Hydraulic Pump

    HYDRAULIC SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 241: Control Valve

    HYDRAULIC SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 242 HYDRAULIC SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 243 HYDRAULIC SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 244: Flow Priority Valve

    HYDRAULIC SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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)

  • Page 245: Relief Valve

    HYDRAULIC SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 5. RELIEF VALVE (1) Hydraulic Pump Gear (2) Hydraulic Pump Case (3) Plug (4) Flow Priority Valve (5) Relief Valve (6) Seat (7) Poppet EF :EF Port (To 3 Points Hitch...
  • Page 246 HYDRAULIC SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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)

  • Page 247: Hydraulic Cylinder

    HYDRAULIC SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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...

  • Page 248: Hydraulic Block Type Outlet

    HYDRAULIC SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 249: Mower Linkage

    HYDRAULIC SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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...
  • Page 250 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-S6 [2] PREPARATION ..................5-S7 (1) Separating Hydraulic Cylinder ............5-S7 (2) Separating Hydraulic Pump ..............5-S10 [3] DISASSEMBLING AND ASSEMBLING..........5-S14 (1) Hydraulic Cylinder and Control Valve ..........5-S14...

  • Page 251: Troubleshooting

    HYDRAULIC SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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...

  • Page 252: Servicing Specifications

    HYDRAULIC SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 2. SERVICING SPECIFICATIONS Item Factory Specification Allowable Limit Relief Valve Setting Pressure 12.3 to 12.7 MPa – (Condition) 125 to 130 kgf/cm Engine speed : 1780 to 1840 psi...

  • Page 253: Tightening Torques

    HYDRAULIC SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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-9.) Item N·m...

  • Page 254: Checking, Disassembling And Servicing

    HYDRAULIC SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 4. CHECKING, DISASSEMBLING AND SERVICING [1] CHECKING AND ADJUSTING (1) Relief Valve Relief Valve Setting Pressure 1. Remove the hydraulic pipe (1). 2. Install the hose and adaptor A (3) with pressure gauge (2).

  • Page 255: Pump And Priority Valve

    HYDRAULIC SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM (2) Pump and Priority Valve Checking Hydraulic 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 256: Mower Lift Linkage

    HYDRAULIC SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM (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 257: Preparation

    HYDRAULIC SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM [2] PREPARATION (1) Separating Hydraulic Cylinder 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.
  • Page 258 HYDRAULIC SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Roll-Over Protective Structures (ROPS) 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 259 HYDRAULIC SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Fuel Tank 1. Drain the fuel. 2. Disconnect the lead wire from fuel level sensor and fuel hoses from the fuel tank (1). 3. Remove the fuel tank stays (2), (3) and cushions, then remove the fuel tank (1).

  • Page 260: Separating Hydraulic Pump

    HYDRAULIC SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Hydraulic Cylinder Block 1. Remove the hydraulic pipe (1). 2. Remove the hydraulic cylinder block mounting bolt. 3. Remove the hydraulic cylinder block (2). (When reassembling) 40 to 44 N·m...
  • Page 261 HYDRAULIC SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Lift Rod and Lower Link 1. Remove the top link (2). 2. Remove the stopper pin (6) and remove the check chain plate (3). 3. Move the bush (8) inside.
  • Page 262 HYDRAULIC SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 (3) and lever guide mounting screw.
  • Page 263 HYDRAULIC SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Hydraulic Pump 1. Disconnect the mower linkage (4). 2. Remove the lift arm LH (2). 3. Remove the hydraulic pipes (1). 4. Remove the hydraulic pump (3). 7.9 to 9.3 N·m Hydraulic pump mounting 0.80 to 0.95 kgf·m...

  • Page 264: Disassembling And Assembling

    HYDRAULIC SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM [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).
  • Page 265 HYDRAULIC SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 266: Mower Lift Linkage

    HYDRAULIC SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM (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...

  • Page 267: Servicing

    HYDRAULIC SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM [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 268: Hydraulic Cylinder

    HYDRAULIC SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM (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 269: Electrical System

    ELECTRICAL SYSTEM KiSC issued 06, 2009 A...
  • Page 270 MECHANISM CONTENTS 1. WIRING DIAGRAM ..................6-M1 2. STARTING SYSTEM ..................6-M3 [1] MAIN SWITCH POSITION..............6-M3 [2] SAFETY SWITCH ................... 6-M4 [3] OPERATOR PRESENCE CONTROL (OPC) ........6-M5 3. CHARGING SYSTEM ................... 6-M6 [1] ELECTRICAL CIRCUIT ................6-M6 [2] IC REGULATOR (3P CONNECTOR TYPE)........6-M7 4.

  • Page 271: Wiring Diagram

    BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM ELECTRICAL SYSTEM 1. WIRING DIAGRAM Oil Pressure Battery Charge Glow Lamp Ground Blinker (L) Lamp Blinker (R) Lamp Ignition (Switched Power) Illumination Fuel Sensor SignaL Hour and Tach. Water Temperature Sensor Signal...
  • Page 272 ELECTRICAL SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Color of Wiring W ..White WR ... White / Red BW ..Black / White R ... Red WY ... White / Yellow BR ..Black / Red L ...

  • Page 273: Starting System

    ELECTRICAL SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 2. STARTING SYSTEM [1] MAIN SWITCH POSITION (1) Fuse (6) HST Neutral (11) Alternator (15) Fuel Pump (2) Seat (7) Main Switch (12) Glow Lamp (16) Solenoid (3) Seat Turn Over...

  • Page 274: Safety Switch

    ELECTRICAL SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM [2] SAFETY SWITCH This switch is electrically closed in normal condition (normally closed type). The switch operates as sensor detecting and transmitting the position of HST pedal, PTO lever, independent PTO lever, and seat to engine stop solenoid.

  • Page 275: Operator Presence Control (Opc)

    ELECTRICAL SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM [3] OPERATOR PRESENCE CONTROL (OPC) The BX 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.

  • Page 276: Charging System

    ELECTRICAL SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 277: Ic Regulator (3P Connector Type)

    ELECTRICAL SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM [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 278: Lighting System

    ELECTRICAL SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 279: Gauges

    ELECTRICAL SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 280: Hour And Tachometer

    ELECTRICAL SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM [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.

  • Page 281: Others

    ELECTRICAL SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 282 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-S9 (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 283 ELECTRICAL SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 284 ELECTRICAL SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM OPERATOR PRESENCE CONTROL (OPC) Reference Symptom Probable Cause Solution Page Engine Does Not Solenoid fuse blown (15A) Replace G-30 Stop Engine stop solenoid replay defective Replace 6-S15 Engine stop solenoid defective...
  • Page 285 ELECTRICAL SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM LIGHTING SYSTEM Reference Symptom Probable Cause Solution Page Head Light Does Not Fuse blown (15 A) Replace G-30 Light Bulb blown Replace G-31 Wiring harness disconnected or improperly Repair or Replace –...
  • Page 286 ELECTRICAL SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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...

  • Page 287: Servicing Specifications

    ELECTRICAL SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 2. SERVICING SPECIFICATIONS Item Factory Specification Allowable Limit Battery Voltage More than 12 V – Potential Less than 0.1 V – Difference Approx. 0.9 Ω Glow Plug Resistance –...

  • Page 288: Tightening Torques

    ELECTRICAL SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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-9.) Item N·m...

  • Page 289: Checking, Disassembling And Servicing

    ELECTRICAL SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 290 ELECTRICAL SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 291: Main Switch

    ELECTRICAL SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM (2) Main Switch Main Switch Connector Voltage 1. Remove the under cover panel. 2. Disconnect the 4P connector (4) and remove the main switch (1). 3. Measure the voltage with a voltmeter across the connector 30 (red) terminal and chassis.

  • Page 292: Starter

    ELECTRICAL SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM (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.

  • Page 293: Safety Switch

    ELECTRICAL SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 294 ELECTRICAL SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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.

  • Page 295: Operator Presence Control (Opc) Switch

    ELECTRICAL SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM (6) Operator Presence Control (OPC) Switch Seat Switch and Seat Turnover Switch Continuity Check 1. Disconnect the 2P connectors (2) from the seat turnover switch (1) and the seat switch.
  • Page 296 ELECTRICAL SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 297: Fuel Pump

    ELECTRICAL SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM (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 298: Charging System

    ELECTRICAL SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 299 ELECTRICAL SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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.

  • Page 300: Combination Switch

    ELECTRICAL SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM (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).
  • Page 301 ELECTRICAL SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 302 ELECTRICAL SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 303 ELECTRICAL SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 304 ELECTRICAL SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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.
  • Page 305 ELECTRICAL SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 306 ELECTRICAL SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Engine Oil Pressure Lamp 1. Disconnect the lead (2) from the engine oil pressure switch (1) after turning the main switch OFF. 2. Turn the main switch ON and connect a jumper lead from the lead to the chassis.

  • Page 307: Gauge

    ELECTRICAL SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM (13) Gauge Fuel Level Sensor 1) Sensor Continuity 1. Remove the fuel level sensor from the fuel tank. 2. Measure the resistance with an ohmmeter across the sensor terminal and its body.
  • Page 308 ELECTRICAL SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 309: Dc Outlet

    ELECTRICAL SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM (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 310: Disassembling And Assembling

    ELECTRICAL SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM [2] DISASSEMBLING AND ASSEMBLING (1) Starter Motor 1. Disconnect the connecting lead (9) from the magnet switch (8). 2. Remove the screws (6), and then separate the end frame (4), yoke (2) and armature (1).

  • Page 311: Servicing

    ELECTRICAL SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM [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 312 ELECTRICAL SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 313: Alternator

    ELECTRICAL SYSTEM BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM (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 314 MOWER KiSC issued 06, 2009 A...
  • Page 315 SAFETY INSTRUCTIONS BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 316 SAFETY INSTRUCTIONS BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM KiSC issued 06, 2009 A...
  • Page 317 SAFETY INSTRUCTIONS BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM KiSC issued 06, 2009 A...
  • Page 318 SPECIFICATIONS BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM SPECIFICATIONS Model RCK60B-23BX RCK54P-23BX RCK54-23BX RCK48P-18BX RCK48-18BX BX2360 BX1860 Suitable tractor BX2360 BX1860 BX2660 BX2360 Quick-Joint, Parallel linkage Self-balance Mounting method suspended Suspended linkage linkage Adjustment of cutting height Dial gauge...
  • Page 319 GENERAL CONTENTS 1. MOWER IDENTIFICATION................7-G1 2. LUBRICANTS ....................7-G2 3. TIGHTENING TORQUES ................7-G3 4. MAINTENANCE CHECK LIST ..............7-G5 5. CHECK AND MAINTENANCE ..............7-G6 [1] CHECK POINTS OF DAILY OR EACH USE ........7-G6 [2] CHECK POINT OF INITIAL 50 HOURS ..........7-G8 [3] CHECK POINT OF EVERY 150 HOURS ...........

  • Page 320: Mower Identification

    G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 1. MOWER IDENTIFICATION When contacting your local KUBOTA distributor, always specify mower serial number. (1) Mower Serial Number A : RCK60B-23BX, RCK54P-23BX, RCK54-23BX, RCK48-18BX B : RCK48P-18BX W1020623 7-G1...

  • Page 321: Lubricants

    G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 2. LUBRICANTS Place Capacity Lubricants RCK60B-23BX 0.36 L RCK54-23BX 0.38 U.S.qts RCK48-18BX 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 RCK48P-18BX 0.13 lmp.qts...

  • Page 322: Tightening Torques

    G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 3. TIGHTENING TORQUES Screws, bolts and nuts whose tightening torques are not specified in this Workshop Manual should be tightened according to the table below. GENERAL USE SCREWS, BOLTS AND NUTS...
  • Page 323 G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM AMERICAN STANDARD SCREWS, BOLTS AND NUTS WITH UNC OR UNF THREADS SAE GR.5 SAE GR.8 Grade Unit Nominal N·m kgf·m lbf·ft N·m kgf·m lbf·ft Diameter 5/16 23.1 to 27.7 2.35 to 2.83...

  • Page 324: Maintenance Check List

    G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 4. MAINTENANCE 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 325: Check And Maintenance

    G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 326 G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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. (1) Grease Nipple (Spindle Shaft)

  • Page 327: Check Point Of Initial 50 Hours

    G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Greasing Front and Rear Anti-scalp Rollers [RCK60B-23BX, RCK54P-23BX, RCK54-23BX] 1. Grease the grease nipple (1), (2) of the front and rear anti-scalp rollers if the amount of grease is insufficient.

  • Page 328: Check Point Of Every 2 Years

    G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM [4] CHECK POINT OF EVERY 2 YEARS Replacing Gear Box Oil Seal 1. Replace the gear box oil seals (1), (2) with new ones. (1) Oil Seal (2) Oil Seal...

  • Page 329: Setting Up Mower

    G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 330 G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 331 G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 332: Mower Adjustment

    G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 333 G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 334 G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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.
  • Page 335 G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 336 MECHANISM CONTENTS 1. POWER TRANSMISSION ................7-M1 2. LIFTING MECHANISM ................. 7-M2 3. SELF-BALANCER SYSTEM ................. 7-M3 KiSC issued 06, 2009 A...

  • Page 337: Power Transmission

    MOWER BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 1. POWER TRANSMISSION (1) 18T Bevel Gear (4) Universal Joint (7) Center Pulley (10) Blade Shaft (2) 17T Bevel Gear (5) Mid-PTO Shaft (8) Bevel Gear Shaft (11) Outer Pulley...
  • Page 338 MOWER BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 339 MOWER BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 340 SERVICING CONTENTS 1. TROUBLESHOOTING ..................7-S1 2. SERVICING SPECIFICATIONS ..............7-S2 3. TIGHTENING TORQUES ................7-S3 4. CHECKING, DISASSEMBLING AND SERVICING........7-S4 [1] CHECKING AND ADJUSTING ...............7-S4 [2] DISASSEMBLING AND ASSEMBLING..........7-S5 [3] SERVICING ....................7-S11 KiSC issued 06, 2009 A...
  • Page 341 MOWER BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 1. TROUBLESHOOTING Reference Symptom Probable Cause Solution Page Blade Does Not Turn Mid-PTO system malfunctioning Check transmission 2-S31, S40 Mower belt broken Replace mower belt 7-S4 Blade Speed Is Slow...

  • Page 342: Servicing Specifications

    MOWER BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 2. SERVICING SPECIFICATIONS Item Factory Specification Allowable Limit Input Shaft (without Mower Belt) Turning Force Less than 118 N – 12.0 kgf 26.5 lbf Turning Torque Less than 1.5 N·m –...

  • Page 343: Tightening Torques

    MOWER BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 7-G3.) [RCK48-18BX, RCK54-23BX, RCK60B-23BX] Item N·m...

  • Page 344: Checking, Disassembling And Servicing

    MOWER BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 4. 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 345: Disassembling And Assembling

    MOWER BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM [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).
  • Page 346 MOWER BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Blade Boss 1. Remove the external snap ring (2). 2. Remove the blade boss (1). (1) Blade Boss (A) RCK48P-18BX, RCK54P-23BX (2) External Snap Ring (B) RCK48-18BX, RCK54-23BX, RCK60B-23BX Gear Box and Mower Belt 1.
  • Page 347 MOWER BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Disassembling Gear Box [RCK54-23BX, RCK60B-23BX] 1. Unscrew the drain plug (1), and drain the gear box oil. 2. Remove the center pulley (20) with a puller, and remove the feather key (18) on the bevel gear shaft (19).
  • Page 348 MOWER BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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).
  • Page 349 MOWER BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Outer Pulley and Blade Shaft 1. Unscrew the outer pulley mounting nuts (21), and remove the outer pulley (34). 2. Unscrew the pulley holder mounting nuts (36), and remove the left pulley holder (27).
  • Page 350 MOWER BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Balancer 1. Unscrew the lock nut (1) both side. 2. Remove the plain washer (2) and balancer spring (3). 3. Unscrew the center pin bolt (6). 4. Remove the center pin (5) and balancer plate (4).

  • Page 351: Servicing

    MOWER BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM [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 352 MOWER BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 353 FRONT LOADER KiSC issued 06, 2009 A...
  • Page 354 SAFETY INSTRUCTIONS BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, 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 355 SAFETY INSTRUCTIONS BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM KiSC issued 06, 2009 A...
  • Page 356 SPECIFICATIONS BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM SPECIFICATIONS Loader Specifications Loader model LA203 LA243 Tractor model BX1860 BX2360, BX2660 Wheel base (WB) 1340 mm (52.8 in.) 1400 mm (55.1 in.) Front tires 16 x 7.5-8 18 x 8.5-10...
  • Page 357 SPECIFICATIONS BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Operational Specifications Loader Model LA203 LA243 Tractor model BX1860 BX2350, BX2660 Lift capacity to max. height (Bucket bottom mid point) 200 kg (441 lbs) 240 kg (529 lbs) Lift capacity (Bucket pivot pin, max. height)
  • Page 358 GENERAL CONTENTS 1. IDENTIFICATION................... 8-G1 2. GENERAL PRECAUTION ................8-G2 3. LUBRICANTS ....................8-G3 4. TIGHTENING TORQUES ................8-G4 [1] GENERAL USE SCREWS, BOLTS AND NUTS (FOR FRONT LOADER AND BACKHOE) ..............8-G4 [2] STUD BOLTS..................8-G4 [3] AMERICAN STANDARD SCREWS, BOLTS AND NUTS WITH UNC OR UNF THREADS ................

  • Page 359: Identification

    G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 1. IDENTIFICATION When contacting your local KUBOTA distributor, always specify front loader model and serial number. (1) Model / Serial Number W1010468 8-G1 KiSC issued 06, 2009 A...

  • Page 360: General Precaution

    G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 2. GENERAL PRECAUTION • During disassembly, carefully arrange removed parts in a clean area to prevent later confusion. Screws, bolts and nuts should be replaced in their original positions to prevent reassembly errors.

  • Page 361: Lubricants

    G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 3. LUBRICANTS To prevent serious damage to hydraulic system, use only specified fluid or its equivalent. Place Capacities Lubricants 11.6 L Transmission Case 3.1 U.S.gals KUBOTA SUPER UDT Fluid * 2.6 lmp.gals...

  • Page 362: Tightening Torques

    G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 4. TIGHTENING TORQUES [1] GENERAL USE SCREWS, BOLTS AND NUTS (FOR FRONT LOADER AND BACKHOE) Screws, bolts, and nuts whose tightening torques are not specified in this Workshop Manual should be tightened according to the table below.

  • Page 363: American Standard Screws, Bolts And Nuts With Unc Or Unf Threads

    G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM [3] AMERICAN STANDARD SCREWS, BOLTS AND NUTS WITH UNC OR UNF THREADS SAE GR.5 SAE GR.8 Grade Unit Nominal N·m kgf·m lbf·ft N·m kgf·m lbf·ft Diameter 11.7 to 15.7 1.19 to 1.61...

  • Page 364: Hydraulic Fittings

    G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM [5] HYDRAULIC FITTINGS Adaptors, Elbows and Others Tightening torque Item Shape Thread size N·m kgf·m lbf·ft 9/16 37 to 44 3.8 to 4.5 27 to 33 Adjustable elbow, Adaptor (O-ring 48 to 54 4.9 to 5.5...

  • Page 365: Maintenance Check List

    G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 5. 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. Check the following points before use.

  • Page 366: Check And Maintenance

    G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 6. CHECK AND MAINTENANCE CAUTION • When checking and repairing, park the tractor on flat ground and apply the parking brake. • When checking and repairing, lower the bucket and stop the engine.

  • Page 367: Dismounting And Mounting Front Loader From Tractor 8-G9

    G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 7. 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 368: Mounting Front Loader To Tractor

    G GENERAL BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM [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 369 MECHANISM CONTENTS 1. HYDRAULIC CIRCUIT SCHEMATIC............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 06, 2009 A...

  • Page 370: Hydraulic Circuit Schematic

    FRONT LOADER BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 1. HYDRAULIC CIRCUIT SCHEMATIC (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...

  • Page 371: Control Valve Assembly

    FRONT LOADER BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 2. CONTROL VALVE ASSEMBLY [1] STRUCTURE (1) Inlet and Outlet Section P : P Port (From Pump) A1 : A1 Port B1 : B1 Port (2) Boom Control Valve...

  • Page 372: Operation

    FRONT LOADER BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM [2] OPERATION Neutral (1) Boom Control Section (5) P.B. Passage 1 T : T Port (To Tank) B1 : B1 Port (2) Bucket Control Section (6) P.B. Passage 2...
  • Page 373 FRONT LOADER BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM (1) Boom Control Section (5) Neutral Passage 1 P : P Port (From Pump) B1 : B1 Port (To Boom Cylinder) (2) Bucket Control Section (6) Load Check Valve T : T Port (To Tank) P.B.
  • Page 374 FRONT LOADER BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Down (1) Boom Control Section (5) Neutral Passage 1 P : P Port (From Pump) B1 : B1 Port (2) Bucket Control Section (6) Load Check Valve T : T Port (To Tank)
  • Page 375 FRONT LOADER BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Floating (1) Boom Control Section (5) Detent Mechanism P : P Port (From Pump) A1 : A1 Port (2) Bucket Control Section (6) Neutral Passage 1 T : T Port (To tank)
  • Page 376 FRONT LOADER BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Roll-back (1) Boom Control Section (6) P.B. Passage 2 P : P Port (From Pump) B2 : B2 Port (2) Bucket Control Section (7) Load Check Valve T : T Port (To Tank) (To Bucket Cylinder) (3) P.B.
  • Page 377 FRONT LOADER BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Dump 1 (1) Boom Control Section (6) P.B. Passage 2 P : P Port (From Pump) A2 : A2 Port (2) Bucket Control Section (7) Load Check Valve T : T Port (To Tank) (To Bucket Cylinder) (3) P.B.
  • Page 378 FRONT LOADER BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Dump 2 (1) Boom Control Section (6) P.B. Passage 2 P : P Port (From Pump) A2 : A2 Port (2) Bucket Control Section (7) Load Check Valve T : T Port (To Tank) (To Bucket Cylinder) (3) P.B.

  • Page 379: Boom Cylinder And Bucket Cylinder

    FRONT LOADER BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 380 SERVICING CONTENTS 1. TROUBLESHOOTING ..................8-S1 2. SERVICING SPECIFICATIONS ..............8-S2 3. TIGHTENING TORQUES ................8-S3 4. CHECKING, DISASSEMBLING AND SERVICING........8-S4 [1] CHECKING AND ADJUSTING ...............8-S1 (1) Control Valve ..................8-S4 [2] DISASSEMBLING AND ASSEMBLING..........8-S1 (1) Control Valve ..................8-S1 (2) Bucket, Boom and Hydraulic Cylinders...........8-S1 (3) Side Frames, Front Guard and Main Frames ........8-S1 [3] SERVICING ....................8-S10 KiSC issued 06, 2009 A...
  • Page 381 FRONT LOADER BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 1. TROUBLESHOOTING Reference Symptom Probable Cause Solution Page Boom Does Not Rise Control valve malfunctioning Repair or replace 8-S5 Boom cylinder defective Repair or replace 8-S7 Control lever linkage defective...

  • Page 382: Servicing Specifications

    FRONT LOADER BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 2. SERVICING SPECIFICATIONS Item Factory Specification Allowable Limit Piston Rod Bend – 0.25 mm 0.0098 in. W1013874 8-S2 KiSC issued 06, 2009 A...

  • Page 383: Tightening Torques

    FRONT LOADER BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 8-G4.) Item N·m...

  • Page 384: Checking, Disassembling And Servicing

    FRONT LOADER BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 4. CHECKING, DISASSEMBLING AND SERVICING [1] CHECKING AND ADJUSTING (1) Control Valve 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 385 FRONT LOADER BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 386 FRONT LOADER BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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...

  • Page 387: Bucket, Boom And Hydraulic Cylinders

    FRONT LOADER BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM (2) Bucket, Boom and Hydraulic Cylinders 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 388 FRONT LOADER BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM 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 389: Side Frames, Front Guard And Main Frames

    FRONT LOADER BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM Installing O-ring and Piston Seal 1. Place the slide jig (2) on the piston (4). 2. Install the O-ring (3) to the piston using the slide jig. 3. Install the piston seal (1) over the O-ring using the slide jig.

  • Page 390: Servicing

    FRONT LOADER BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM [3] 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 391 EDITOR : KUBOTA FARM & INDUSTRIAL MACHINERY SERVICE, LTD. 64, ISHIZU-KITAMACHI, SAKAI-KU, SAKAI-CITY, OSAKA, 590-0823, JAPAN PHONE : ( 81 ) 72-241-1129 : ( 81 ) 72-245-2484 E-mail : ksos-pub@kubota.co.jp Printed in Japan 2009. 06, S, E I , E I , e Code No.9Y111-01951 KUBOTA Corporation 2008.

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