IHI IC120 Operation Manual
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IHI IC120 Operation Manual

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OPERATION MANUAL
IC120
SERIAL NUMBER
CB003001 ~
PUB.1
1209 ENG

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Table of Contents
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Summary of Contents for IHI IC120

  • Page 1 OPERATION MANUAL IC120 SERIAL NUMBER CB003001 ~ PUB.1 1209 ENG...

  • Page 2: Table Of Contents

    Procedure of dump operation ··········································································· 3-11 Caution of dump operation ··············································································· 3-11 How to lower body in case of emergency ···························································· 3-12 STOPPING THE ENGINE ·················································································· 3-13 PRECAUTION ON USE OF RUBBER CRAWLER SHOE ········································· 3-14 TOWING········································································································· 3-17 IC120 ENG...
  • Page 3 Check concentration of coolant additive ······························································ 4-23 Check anti-freezing solution concentration ·························································· 4-23 Change the coolant ························································································ 4-24 Check the fan belt ·························································································· 4-25 FUEL SYSTEM ································································································ 4-26 Applicable fuel······························································································· 4-26 Check the fuel level ························································································ 4-27 Drain the fuel tank ·························································································· 4-27 IC120 ENG...
  • Page 4 ELECTRIC SYSTEM ························································································· 4-31 Change the fuses··························································································· 4-31 Change the fusible link ···················································································· 4-31 Check the battery··························································································· 4-32 HANDLING IN COLD WEATHER········································································· 4-33 LONG TERM STORAGE···················································································· 4-34 HYDRAULIC SYSTEM DIAGRAM········································································ 4-35 ELECTRIC SYSTEM DIAGRAM ·········································································· 4-36 SPECIFICATIONS SPECIFICATIONS AND DIMENSIONS ···································································5-1 IC120 ENG...

  • Page 5: Foreword

    Please understand it. Whenever a question arises regarding your machine, or this publication, please consult your local IHI distributor for the latest available information.

  • Page 6: Safety Information

     Keep this manual on hand during operation so that you can immediately consult it when necessary. If it should be missing or damaged, place an order from IHI distributor for a replacement.  There are various kinds of federal, state, and local regulations that effect construction and industrial machinery.
  • Page 7 This manual describes the basic safety instructions to be observed in daily operation, inspection and maintenance of the machine. Observe these instructions carefully for safety. Check the safety with great care for any other matters not described in this manual. IC120 ENG...

  • Page 8: Precautions Before Operation

     Start the work only after discussing with the person in charge at the site the rules and precautions inside the work place as well as the work procedure.  When working together with other persons, determine the signals and who is to give those signals. IC120 ENG...
  • Page 9 CONDUCT WARM-UP BEFORE OPERATION If the machine is operated without carrying out sufficient warming up operation, it can lead to movements not intended by the operator, and can lead to accidents. Always carry out sufficient warming up operation. IC120 ENG...

  • Page 10: Precautions During Operation

    Check that no one is within the working area of the machine before attempting to move it.  Position a guiding person to guide and check when necessary or when the field of view is bad. IC120 ENG...
  • Page 11 Be careful. DO NOT TRY TO TRAVEL OVER OBSTRUCTIONS Trying to travel over obstacles could cause the machine to lose its balance and topple over. Avoid potential obstacles in your path. IC120 ENG...
  • Page 12 Any person riding as a passenger can fall off and suffer injury. In addition, such a passenger also obstructs the driving by the Operator. Only operator is authorized to be on the machine during operation. Never let unauthorized personnel ride on the machine. IC120 ENG...

  • Page 13: Precautions After Operation

     Put the operation lock lever in its locked position.  Stop the engine and take out the ignition key.  Lock the cover and all other lockable parts. Leave the operator’s seat after taking the above measures. IC120 ENG...

  • Page 14: Precautions At Transporting

    INDICATIONS DURING INSPECTION AND MAINTENANCE Hang a warning board saying “Under Inspection / Maintenance” at an easy to see location of the operation lever so that nobody other than the concerned persons touches it. IC120 ENG...
  • Page 15  Watch the track or track adjustment cylinder to see if the track is being loosened. Loosen the check valve one turn only.  Do not put your face, hand, foot, or body in front of the check valve. IC120 ENG...
  • Page 16 Never open the radiator cap when the temperature is till high. When the water temperature lowers, loose the cap gradually to reduce the pressure and remove the cap. IC120 ENG...
  • Page 17  Inspect for leakage of fuel, oil, and working oil and repair if there is any defect, and wipe off all oil that has leaked.  Make sure where a fire extinguisher is placed and know how to use it. IC120 ENG 1-10...

  • Page 18: Warning Signs And Labels

    Make sure that you can read all safety signs. Clean or replace these if you cannot read the words. 15 12 10 14 Inside of cabin Side of instrument panel (In tool box) Door side IC120 ENG 1-11...
  • Page 19 SAFETY 1. Precautions on safety 2. Precaution for working under the (D405 624 00) raised body (4448 816 00) 3. Crawler shoe tension adjustment 4. Operation lock lever (D405 516 00) (D407 957 00) IC120 ENG 1-12...
  • Page 20 5. Traveling on a slope 6. Loading and unloading the machine (D406 188 00) (D405 618 00) 7. Under-water works 8. Safety alarm (D406 189 00) (D408 110 00) 9. How to lower body in case of emergency (D408 034 00) IC120 ENG 1-13...
  • Page 21 Turn off before over an obstacle. inspection and Read manual and maintenance. follow instructions for (D405 482 00) safe and proper operation. (D405 368 00) IC120 ENG 1-14...
  • Page 22 Do not start the engine or move any of the controls if there is DO NOT OPERATE or similar warning tag attached to the start switch or controls. (D405 323 00) IC120 ENG 1-15...

  • Page 23: Controls

    CONTROLS This section describes the functions of the devices needed to operate this machine and the proper operation procedures. Understand them sufficiently and operate the machine in safe. IC120 ENG...

  • Page 24: Nomenclature

    Upper roller Fuel tank Dump cylinder Oscillating link Hydraulic tank Safety bar Travel device Engine Body Drive sprocket Radiator, oil cooler Rear gate Headlight Muffler (DPF) Rubber crawler Turn signal lamp Air cleaner Idle tumbler Hydraulic pump Lower roller IC120 ENG...

  • Page 25: Controls And Instruments

    CONTROLS CONTROLS AND INSTRUMENTS Name Name Instrument panel Operator seat Lever box Seat belt IC120 ENG...

  • Page 26: Instrument Panel

    DPF regeneration disabled lamp Engine key switch DPF manual regeneration/engine Reserve diagnostic switch DPF regeneration disabled switch Travel speed select switch Engine stop delay switch Engine service connector Buzzer Fuse box DPF: Diesel Particulate Filter HEST: High Exhaust System Temperature IC120 ENG...

  • Page 27: Display

    Engine data display screen screen The “Fault code display screen” and “Engine data display screen” are used by our serviceman when a trouble occurs in the machine or engine. The screen changes into the “Operation screen” when the key is pressed. IC120 ENG...
  • Page 28 Indicates the current battery voltage. Slope alarm indicator (5) This indicator appears on the screen and blinks if the machine inclines forward by 9 or more. At the same time, the red LED (6) blinks and the buzzer sounds for five seconds. IC120 ENG...
  • Page 29 It becomes lower when the key is pressed. The length of the status display bar changes as the key is pressed. The screen changes into the “Operation screen” automatically when either key is not pressed for four seconds. IC120 ENG...

  • Page 30: Preheat Lamp

    Air cleaner clogging lamp This lamp goes on if the air cleaner is clogged while the engine is running. Stop the engine and clean or replace the air cleaner element if this lamp goes on while the engine is running. IC120 ENG...

  • Page 31: Dpf Alarm Lamp

    Repair work is needed after stopping the engine. Contact us or our sales service shop. DPF regeneration disabled lamp When the DPF regeneration disabled switch is set to the disabled position, this lamp goes on and indicates that the DPF regeneration function is disabled. IC120 ENG...

  • Page 32: Diagnostic Switch

    The engine stops 30 seconds after the engine stopped lamp blinks. position: The time until the engine stops is prolonged by 30 seconds when this switch is set to the position while the engine stopped lamp is blinking. IC120 ENG...

  • Page 33: Fault Code Next Switch

    Turn the switch to the position to indicate the next (blinking) fault code. Turn it to the position to indicate the previous (blinking) fault code. When a single fault code is recorded, it is indicated repeatedly. IC120 ENG 2-10...

  • Page 34: Hour Meter

    OFF: Press the position with no mark. The parking brake is released and the mark lamp goes out. Cigarette lighter The switch is turned on automatically when the knob is pushed down. It is pushed out several seconds later. Pull it out and use it. IC120 ENG 2-11...

  • Page 35: Wiper Switch

    Turn the lever to point the mark (►) to a symbol. : (OFF) : (ON) Two outside lights emit light downward. : (ON) Four lights emit light upward. Horn switch Press the button (3) of this switch to turn on the horn. IC120 ENG 2-12...

  • Page 36: Engine Throttle Dial

    High speed: Push down on the mark. The mark lamp goes on. Low speed: Push down the no-mark position. The mark lamp goes out. Engine service connector Connect the engine service tool to this connector when diagnosing engine troubles. IC120 ENG 2-13...

  • Page 37: Lever Box

    CONTROLS Lever box Name Name Travel lever Unused Operation lock lever Unused Dump switch Dump lock switch IC120 ENG 2-14...
  • Page 38 See “DUMP OPERATION” in the OPERATION section for the dumping operations. Push Dump lock switch This switch prevents the body from moving if the operator touches the dump switch by mistake. The dump switch works only when the dump lock switch is pushed. IC120 ENG 2-15...

  • Page 39: Operator Seat

     Shake the seat back and forth lightly and check if the seat is fixed firmly after adjusting it. If the seat is not fixed, it may move suddenly and cause unforeseen accidents. IC120 ENG 2-16...

  • Page 40: Seat Belt

    4. Press the button (3) of the buckle to unfasten seat belt. WARNING  ALWAYS fasten the seat belt while operating the machine.  ALWAYS check the condition of the seat belt and mounting hardware before operating the machine. Replace the seat belt if it is damaged. IC120 ENG 2-17...

  • Page 41: Operation

    OPERATION This section describes the proper operation procedures of this machine. Always look to the safety and observe the given operation instructions and cautions to carry out works safely. IC120 ENG...

  • Page 42: Before Starting Operation

    Refer to [MAINTENANCE] for details.  Check the coolant quantity. Refill if necessary.  Check the engine oil quantity. Refill if necessary.  Check the fuel quantity. Refill if necessary.  Check the hydraulic oil quantity. Refill if necessary. IC120 ENG...

  • Page 43: Before Starting The Engine

    (9) and make sure that the turn signal lamps go on.  Push down the horn switch of the combination switch (9) and make sure that the horn sounds. Ask IHI’s sales service dealer for repair services, if some abnormality is found in the above check. IC120 ENG...

  • Page 44: Engine Starting

    If some abnormality is found, stop the engine immediately, find the cause and repair the defective part. 1. Make sure that all alarm lamps on the instrument panel are off. 2. Check if engine exhaust color, sound and vibrations are not abnormal. Alarm lamps IC120 ENG...

  • Page 45: Warming Up The Machine

    3 to 5 minutes to raise the hydraulic oil temperature. 3. Move the machine forward and backward and raise and lower the body several times to warm up the mechanisms. IC120 ENG...

  • Page 46: Starting With Jumper Cables

    Disconnect the clip from the negative terminal of the charged battery then. 2. Disconnect the clip of the red cable from the positive terminal of the charged battery first. Disconnect the clip from the positive terminal of the dead battery then. IC120 ENG...

  • Page 47: Break-In" Operation

    Run the machine at approximately 80% of the maximum engine speed. Place loads of approximately 80% of the maximum loading capacity.  Do not start or accelerate quickly or stop unnecessarily. Do not change the direction quickly. IC120 ENG...

  • Page 48: Traveling The Machine

    4. Use the travel lever as shown below. Forward: Push the travel lever forward. Stop: Set the travel lever to the neutral position. Backward: Pull the travel lever backward. Increase the travel lever stroke to raise the speed. Decrease the stroke to reduce the speed. IC120 ENG...

  • Page 49: Steering Control

    If the engine stall when changing directions while the engine speed is low or the travel select switch is set to high. Restart the engine, increase the engine speed and set the travel select lever is set to low. Avoid the engine stall to control the travel levers stroke while travelling. IC120 ENG...

  • Page 50: Caution Of Travel On A Steep Grade

     Do not accelerate or decelerate the speed or stop suddenly.  The engine may stop if the travel lever is pulled fully while climbing a slope. When the engine speed lowers, return the travel lever slightly to reduce the engine load. IC120 ENG...
  • Page 51 The cause of overrun is over-loading. Never over-load the machine.  Do not use the engine emergency stop switch in any other cases than overrun. If the engine is stopped immediately, the machine may fall down or become defective. IC120 ENG 3-10...

  • Page 52: Dump Operation

    4. Make sure that the body has lowered completely before starting the machine. 5. Do not travel while the body is raised. ALWAYS Dump at a level and stable place. travel keeping the body lowered. IC120 ENG 3-11...

  • Page 53: How To Lower Body In Case Of Emergency

    1. Make sure that there are no persons under or around the body. 2. Open the cover. 3. Loosen the plug slowly until the body begins to lower. 4. Tighten the plug firmly after body has lowered completely. Control valve IC120 ENG 3-12...

  • Page 54: Stopping The Engine

    Repair defective parts if oil leak or damages are found. 2. Fill the fuel tank with fuel. 3. Remove soil and sand from the body and traveling mechanisms, in particular. 4. Lock the fuel filling port, engine hood and all other lockable parts. IC120 ENG 3-13...

  • Page 55: Precaution On Use Of Rubber Crawler Shoe

    When any crack is Steel cord Covering rubber detected, immediate repair is essential. Please contact your local IHI distributor. Cautions while working and traveling Avoid the following while traveling. DO NOT TRAVEL OR WORK ON STONE...
  • Page 56  Travel slowly and take care not to let the crawlers come off the rollers.  Do not change directions when the crawlers may have lost tension at the high and low parts of ruts and protrusions. This may cause the crawlers to come off. IC120 ENG 3-15...
  • Page 57 ALWAYS USE CORRECT TENSION ON THE SHOE Upper roller Idler Attempting to change directions on terrain with different levels or steps while the rubber crawler is still slack may damage the rubber crawlers or cause them to come off the rollers. IC120 ENG 3-16...

  • Page 58: Towing

    4. Move the travel lever in the travel direction slowly when towing starts. NOTICE When the engine is broken and will not start, the parking brake will not release. The parking brake will prevent the crawler shoe from rotating so the carrier cannot be towed. IC120 ENG 3-17...

  • Page 59: Transport

    Loading ramp Blocks degrees 4. Drive the machine slowly at low speed. 5. Maintain the machine balance point while traveling over the loading ramp joint areas. 6. Load the machine properly at the specified position on the trailer. IC120 ENG 3-18...

  • Page 60: Fixation At Transport

    Wire rope Wire rope Apply wheel blocks in front of and behind the rubber crawlers to fix the machine. Finally, make sure that the machine is loaded properly and fixed completely. Wheel block Wheel block IC120 ENG 3-19...

  • Page 61: Lifting The Machine

    Install the wire rope to the sling frame with the shackle. Install the wire rope to the crane hooks and lift upward so the crawler is a little bit above the ground, then stop lifting. If the balance is good continue slowing lifting the machine. IC120 ENG 3-20...
  • Page 62 Proper maintenance is needed to maintain the machine performances for long and prevent damages and troubles in advance. This section describes the proper maintenance procedures of this machine. Carry out maintenance safely and properly in accordance with the maintenance procedures described below. IC120 ENG...

  • Page 63: Precaution On Maintenance

    Use oil and grease of viscosity appropriate to the temperature. Ask IHI’s sales service dealer for important maintenance. Ask IHI’s sales service dealer for important maintenance works such as replacement of electronic parts, adjustment of the hydraulic pressure and so forth that require professional knowledge and technique.

  • Page 64: Use The Safety Bar

    Such an action may cause breakage of the safety bar or body. When the safety bar is set. Frame Removing the safety bar 1. Raise the body completely. 2. Remove the safety bar from the bracket and store the bar onto the frame. IC120 ENG...

  • Page 65: Periodical Exchange Of The Important Parts

    Hydraulic hose (between pump, CV and dump cylinder) Repair or replace these parts immediately if some abnormalities or defects are found in them even before the replacement periods. Also check the fuel hoses and hydraulic hoses in daily check, monthly check and yearly check. IC120 ENG...

  • Page 66: Maintenance Intervals

    & refill Check coolant additive  concentration Coolant Check antifreeze  concentration Replace coolant  Coolant Replace  filter cartridge Check tension & Fan belt  cracks Check cracks  Radiator Check leak &  hose damages IC120 ENG...
  • Page 67 Check damper Overhead  Check valve  Clean & replace  Also refer to the “Operation Manual of Engine” for details of the engine.  Contact our sales service dealer for the maintenance items with the marks.  IC120 ENG...

  • Page 68: Recommended Lubrication Table

    Total q’ty: Coolant Mix 50% long life coolant (LLC). 38.8 L Cooling system Coolant When replacing DCA4 Part No. DCA65L additive coolant: 1.9 L • The oil with the * mark is used for the machine before shipment. IC120 ENG...

  • Page 69: Lubricate The Grease

    2 positions  Dump cylinder foot pins (6) 2 positions Oscillating link  Oscillating link pins (7) 8 positions NOTICE Grease the link pins everyday before starting works if the machine is used on damp grounds or in mud. IC120 ENG...

  • Page 70: Rubber Crawler

    RUBBER CRAWLER Rubber crawler shoe maintenance Rubber crawler shoe should be repaired or exchanged under the next conditions. If it is necessary to repair or replace it, contact your IHI dealer.  Height of Lugs Crack of covering rubber The rubber crawler can be used even if it is worn,...

  • Page 71: Track Adjustment

     If the rubber crawlers are not tensioned properly, the cylinders may be defective. Ask IHI’s sales service dealer for repair services. Loosening the rubber crawlers 1. Remove dirt and soil from around the idle tumblers. 2. Loosen the check valve until grease is discharged (by a maximum of one turn) little by little.

  • Page 72: Check The Fixed Bolt Torque

    245 to 295 Nm first. (3) Then, tighten the bolts in the order shown on the right at the specified torque of 476 Nm. Tighten the bolts quickly since screw locking agent is applied to them. IC120 ENG 4-10...
  • Page 73 Bracket and frame (rear) 48.5 Engine and bracket (front) Bracket and frame (front) 24.6 Hydraulic pump Tightening torque Wrench required Tightening position Bolt size (mm) (N·m) (kgf·m) Engine and pump housing Pump housing and hydraulic pump 48.5 IC120 ENG 4-11...

  • Page 74: General Torque Specifications

    Metric fine thread Tightening size thread heat-treated Hose size size heat-treated bolt torque (mm) bolt (inch) (N·m) (kgf·m) (N·m) (kgf·m) (N·m) (kgf·m) 1/4" 3/8" 1/2" 13.7 13.8 3/4" 12.0 21.2 22.5 1" 14.0 41.9 46.1 1-1/4" 17.0 72.9 82.7 IC120 ENG 4-12...

  • Page 75: Travel Reduction Gear

    3. Remove the 3 plugs to discharge oil. 4. Attach the drain plug. 5. Fill the specified quantity of gear oil through the filler port. 6. Attach the level plug when oil is discharged through the level port. IC120 ENG 4-13...

  • Page 76: Hydraulic System

    1. Loosen the drain plug (4) under the hydraulic oil tank to discharge water and sediment into the container. 2. Close the drain plug when clean hydraulic oil is only discharged. 3. Check the hydraulic oil level. Refill oil if insufficient. IC120 ENG 4-14...

  • Page 77: Change The Hydraulic Oil And Clean The Strainer

    Bring the machine into the posture for checking the hydraulic oil level. Stop the engine. 10. Make sure that the hydraulic oil level is within the proper range. Refill hydraulic oil if insufficient. IC120 ENG 4-15...

  • Page 78: Replace The Return Filter And Line Filter

    2. Put in the safety bar, lower the body, and check the level of the hydraulic oil tank. If the oil surface is between H and L of the level gauge, the oil quantity is proper. Refill the tank with hydraulic oil if the oil level is low. IC120 ENG 4-16...

  • Page 79: Engine Oil System

    Furthermore, it may cause increase of oil consumption, reduction of the engine output, and damage to the engine. Troubles and accidents caused by using improper engine oil are exempted from the warranty. IC120 ENG 4-17...

  • Page 80: Replace The Engine Oil And Engine Oil Filter

    3. Remove the drain plug slowly so that oil will not splash on you. Discharge oil then. 4. Check drain oil. Contact IHI’s sales service dealer if it contains much metallic powder, foreign matters, etc. 5. Tighten the drain plug.
  • Page 81 2. Run the engine idle for a mean while and check if no oil leaks. 3. Check the oil level again after 15 minutes or more have passed since the engine stops. Refill the engine with engine oil if it is insufficient. IC120 ENG 4-19...

  • Page 82: Cooling System

    If it is put into eyes, wash the eyes with water sufficiently immediately and consult a doctor.  If it is necessary to store it, use a container with an antifreeze mark, cap it and store it in a place inaccessible by children. IC120 ENG 4-20...

  • Page 83: Check The Coolant Level

    5. If the coolant tank is empty, water may leak from it. Coolant tank Check if water leaks from the tank. Remove the radiator cap and check the water level of the radiator. If it is insufficient, pour coolant into the radiator and refill the coolant tank then. IC120 ENG 4-21...

  • Page 84: Replace The Coolant Filter

    If the coolant filter is tightened excessively with a tool, its threads may be deformed or the filter head may be damaged.  Set the shut-off valve to the “Open” position to avoid damages to the engine. IC120 ENG 4-22...

  • Page 85: Check Concentration Of Coolant Additive

    It is needed in all seasons throughout the year. * Use the FleetGuard Refractometer (part No. C2800) to check the freezing point of coolant and the concentration of anti-freezing solution. IC120 ENG 4-23...

  • Page 86: Change The Coolant

    10. Run the engine five minutes and stop it then. Wait until the temperature of coolant lowers, and check the coolant level. Refill the tank with coolant if coolant is insufficient. IC120 ENG 4-24...

  • Page 87: Check The Fan Belt

    2. Replace the belt if it has flaws or cracks. The spring type belt tensioner pulley adjusts tension of the fan belt automatically. Contact our sales service dealer if it is necessary to adjust belt tension or replace the belt. IC120 ENG 4-25...

  • Page 88: Fuel System

    Never use any other fuel than light oil. Damages or troubles caused by using fuel other than light oil are not covered by the warranty. Name Fuel tank Water separator Fuel filter Fuel cooler Fuel piping system diagram IC120 ENG 4-26...

  • Page 89: Check The Fuel Level

    Do not fill fuel up to the top of the tank. Drain the fuel tank 1. Loosen the drain cock (3) at the bottom of the fuel tank to discharge water and sediment into the container. 2. Close the drain plug when clean fuel is only discharged. IC120 ENG 4-27...

  • Page 90: Water Separator And Fuel Filter

    3. Discharge water and sediment until clean fuel is discharged. 4. Close the valve when clean fuel is discharged. 5. To close the valve, lift and turn it clockwise as far as you can close it by hand. Open Closed IC120 ENG 4-28...

  • Page 91: Replacing Water Separator And Fuel Filter

    4. Start the engine at low revolution. 5. Increase the engine revolution slowly. WARNING Do not open the high-pressure engine fuel system while the engine is running. Otherwise, high-pressure fuel spouts out, resulting in serious injury or death. IC120 ENG 4-29...

  • Page 92: Air Intake And Exhaust System

    Be sure to stop the engine before cleaning or changing the air cleaner. If it is cleaned or changed while the engine is running, dust is sucked in, causing engine damages. • Remove the secondary element with great care not to allow dust or foreign matters from entering the air cleaner pipe. IC120 ENG 4-30...

  • Page 93: Electric System

    Detach and check the fusible link. Replace it with a new fusible link, if it has blown out. The fusible link is mounted in the battery cover. Fusible link 2P (60A+140A) IC120 ENG 4-31...

  • Page 94: Check The Battery

    2. Detach the terminals and polish them with a wire brush or sandpaper if they are corroded remarkably. 3. Apply grease, etc. thinly to the terminals after cleaning and tightening. IC120 ENG 4-32...

  • Page 95: Handling In Cold Weather

     Put plates on dry and solid ground and park the machine on them in order to prevent the crawlers and around them from freezing.  Discharge water from the fuel tank to prevent fuel from freezing. IC120 ENG 4-33...

  • Page 96: Long Term Storage

    3. Warm up the engine at low speed. Increase the engine speed after the water temperature reaches the proper temperature. After Storage Lubricate or grease every necessary part, check the coolant level and refill coolant if necessary, before using the machine after long-term storage. IC120 ENG 4-34...

  • Page 97: Hydraulic System Diagram

    QSL9 Relief valve set pressure Code Item P1, P2 Pump cut off relief 34.3 P1, P2 Pump high pressure relief 37.3 CP1, CP2 Charge pump relief P3 Pump main relief 17.7 Over load relief for dump (lowering) IC120 ENG 4-35...

  • Page 98: Electric System Diagram

    MAINTENANCE ELECTRIC SYSTEM DIAGRAM Engine key switch contact Terminal Position Preheat Start Engine frame Engine 1 Engine 2 Engine 3 Engine 4 Engine and power circuit Display circuit Travel and alarm circuit IC120 ENG 4-36...
  • Page 99 DEC. RESUME Light circuit Dump control circuit Color symbol table Black Gray Blue Green Brown Orange Violet Light green White Sky blue Yellow Pink Air conditioner circuit Note: Unless otherwise specified, the wire thickness is AVSS 0.75. IC120 ENG 4-37...
  • Page 100 Head light (Left inside) Travel speed lamp Head light (Right inside) Travel speed select switch Head light (Right outside) Travel speed select solenoid Dump lock switch Parking lamp Dump switch Parking switch Proportional controller Parking solenoid Dump solenoid IC120 ENG 4-38...

  • Page 101: Specifications

    SPECIFICATIONS IC120 ENG...

  • Page 102: Specifications And Dimensions

    Tumbler center distance 3790 Overall crawler width 2750 Crawler width Minimum height from ground Body length 3545 Inner body width 2450 Body height Body floor height from ground 1390 Maximum dumping angle ºC Maximum height in dumping 5170 IC120 ENG...
  • Page 103 All rights reserved. First Edition, September 2012 取 扱 説 明 書 IC120 OPERATION MANUAL 編集及び発行所 プロダクトサポート部 Editing & Publishing Office. Product Support Department 〒236-8611 神 奈 川 県 横 浜 市 金 沢 区 昭 和 町 3 1 7 4...

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