Komatsu HM400-3MO Dump Truck Service Repair Shop Manual (5001 and up) - SEN06284-03

This Complete Service Repair Workshop Manual PDF Download for the HM400-3MO Komatsu Articulated Dump Truck (5001 and up) has easy to read text sections with top quality diagrams, pictures and illustrations. The step by step instructions show you how to fault find or complete any repair or overhaul, correctly and efficiently, saving time and avoiding costly mistakes. All specifications and tolerances are listed. Functions of components and systems are also explained.


APPLICABLE MODELS :

Komatsu HM400-3MO Articulated Dump Truck
Serial Numbers : 5001 and up


TABLE OF CONTENTS :

- Index and foreword
- Specification
- Structure and function
- Standard value tables
- Testing and adjusting
- Troubleshooting
- Disassembly and assembly
- Maintenance standard
- Appendix
- Diagrams and drawings
- INDEX


MANUAL SPECIFICATION :

File Format : PDF
Language : English
Printable : Yes
Searchable : Yes
Bookmarked : Yes
Product Code : SEN06284-03
Total Pages : 1974


This manual has been prepared as an aid to improve the quality of repairs by giving the serviceman an accurate understanding of the product and by showing him the correct way to perform repairs and make judgements. Make sure you understand the contents of this manual and use it to full effect at every opportunity. This is a must for the Do-It-Yourselfer! Saving Yourself $$$$$$ In Service Repair And Maintenance Costs !!!!

This manual PDF download contains specs, diagrams, actual real photo illustrations, and schemes. In addition to space savings, nice thing about having PDF files instead of a hard-printed manual is that you can use the Search feature in Acrobat to find just what your looking for and just print out the exact pages you need or all manual.

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Cover
00 Index and foreword
Index
Foreword, safety and general information
Important safety notice
How to read the shop manual
Explanation of terms for maintenance standard
Handling equipment of fuel system devices
Handling of intake system parts
Handling of hydraulic equipment
Method of disconnecting and connecting of push-pull type coupler
Handling of electrical equipment
How to read electric wire code
Precautions when performing operation
Practical use of KOMTRAX
Standard tightening torque table
List of abbreviation
Conversion table

01 Specification
Table of contents
Specifications
Specification drawing
Specifications
Weight table
Table of fuel, coolant, and lubricants

10 Structure and function
Table of contents
Engine and cooling system
Engine related parts
Output shaft
Turbocharger
EGR system layout drawing
EGR system circuit diagram
EGR valve
Bypass valve
Venturi system
EGR cooler
Muffler
Cooling system
Radiator fan pump
Aftercooler fan motor
Radiator fan motor
Oil cooler bypass valve
Power train
Power train system
Drive shaft
Torque converter and transmission hydraulic piping
Torque converter
Transmission
Transmission control valve
Forward and reverse clutch ECMV and gear speed clutch ECMV
Lockup clutch ECMV
Differential lock clutch ECMV
Main relief valve, torque converter relief valve, and main flow selector valve
Axle
Differential
Final drive
Steering system
Layout of steering devices
Steering column
Flow amplifier valve
Steering valve
Emergency steering pump
Emergency steering motor
Brake system
Layout of brake parts
Parking brake solenoid and accumulator charge valve
Accumulator
Shut off solenoid valve
Brake valve
Proportional pressure reducing valve
Slack adjuster
Brake
Brake system tank
Parking brake
Undercarriage and frame
Suspension
Suspension cylinder
Oscillation hitch
Hydraulic system
Hydraulic component layout
Dump body control
Hydraulic tank
Steering and hoist pump
Hoist valve
Steering pump selector solenoid valve
Dump EPC valve
Center brake cooling remote motor
Front brake cooling relief valve
Center brake cooling relief valve
Cab and its attachments
ROPS cab
Cab tilt
Electrical system
Electrical control system
Machine monitor system
Rear view monitor system
KOMTRAX system
System component parts
Sensor

20 Standard value tables
Table of contents
Standard service value table
Standard value table for engine
Standard value table for machine

30 Testing and adjusting
Table of contents
Related information on testing and adjusting
Tools for testing and adjusting
Sketch of tools for testing and adjusting
Engine and cooling system
Testing engine speed
Testing boost pressure
Testing exhaust gas temperature
Testing exhaust gas color
Adjusting valve clearance
Testing compression pressure
Testing blowby pressure
Testing engine oil pressure
Testing drive pressure of EGR valve and bypass valve
Testing fuel pressure
Handling cylinder cutout mode operation
Handling no‐injection cranking operation
Testing fuel return rate and leakage
Bleeding air from fuel system
Testing fuel circuit for leakage
Testing radiator fan and aftercooler fan speed
Testing and adjusting alternator belt tension
Testing and adjusting air conditioner compressor belt tension
Power train
Testing torque converter stall speed
Testing power train oil pressure
Adjusting transmission speed sensor
Adjusting transmission controller
Retrieval of disabled machine that resulted from a trouble in electrical system
Retrieval of disabled machine due to traction control system (KTCS) failure
Steering system
Testing and adjusting steering circuit oil pressure
Brake system
Testing and adjusting brake oil pressure
Testing accumulator nitrogen gas pressure and charging procedure for accumulator nitrogen gas
Testing braking performance
Bleeding air from brake circuit
Testing wear of wheel brake disc
Parking brake emergency releasing procedure
Testing wear of parking brake pad and adjusting clearance
Hydraulic system
Testing and adjusting suspension cylinder
Testing and adjusting dump circuit oil pressure
Work equipment
Adjusting dump body positioner sensor
Cab and its attachments
Cab tilt up procedure
Electrical system
Setting and adjusting each equipment
Special functions of machine monitor
KOMTRAX terminal start-up procedure
Handling voltage circuit of engine controller
Handling battery disconnect switch
Pm clinic
Pm Clinic service

40 Troubleshooting
Table of contents
Related information on troubleshooting
Troubleshooting points
Sequence of events in troubleshooting
Check before troubleshooting
Inspection procedure before troubleshooting
Preparation for troubleshooting of electrical system
Classification and procedures for troubleshooting
Symptom and troubleshooting numbers
Information in troubleshooting table
Procedure for troubleshooting wiring harness of pressure sensor system for open circuit
Connector list and layout
Connector contact identification
T-branch box and T-branch adapter table
Fuse location table
Precautions on troubleshooting of machine monitor
Processing procedure of harness checker for troubleshooting of machine monitor LCD unit
Failure codes table
Troubleshooting by failure code (Display of code)
Failure code [1500L0] Double Engagement of T/M Clutches
Failure code [15B0NX] Transmission Oil Filter Clogging
Failure code [15F0KM] Abuse 1 of Gear Shifting from R to F
Failure code [15F0MB] Abuse 2 of Gear Shifting from R to F
Failure code [15F7KM] Abuse of TM Forward Clutch Disk
Failure code [15G0MW] Failure of Clutch (Reverse)
Failure code [15G7KM] Abuse of TM Reverse Clutch Disk
Failure code [15H0MW] Failure of Clutch (High)
Failure code [15J0MW] Failure of Clutch (Low)
Failure code [15K0MW] Failure of Clutch (1st)
Failure code [15L0MW] Failure of Clutch (2nd)
Failure code [15M0MW] Failure of Clutch (3rd)
Failure code [15SBL1] Release Trouble of ECMV (Reverse)
Failure code [15SBMA] Malfunction of ECMV (Reverse)
Failure code [15SCL1] Release Trouble of ECMV (High)
Failure code [15SCMA] Malfunction of ECMV (High)
Failure code [15SDL1] Release Trouble of ECMV (Low)
Failure code [15SDMA] Malfunction of ECMV (Low)
Failure code [15SEL1] Release Trouble of ECMV (1st)
Failure code [15SEMA] Malfunction of ECMV (1st)
Failure code [15SFL1] Release Trouble of ECMV (2nd)
Failure code [15SFMA] Malfunction of ECMV (2nd)
Failure code [15SGL1] Release Trouble of ECMV (3rd)
Failure code [15SGMA] Malfunction of ECMV (3rd)
Failure code [15SJMA] Malfunction of ECMV (Lockup)
Failure code [15SKMA] Malfunction of ECMV (Inter-Axle Diff.)
Failure code [2F00KM] Dragging of Parking Brake
Failure code [2G42ZG] Accumulator Oil Pressure Low (Front)
Failure code [2G43ZG] Accumulator Oil Pressure Low (Rear)
Failure code [879AKA] A/C Inner Sensor Open Circuit
Failure code [879AKB] A/C Inner Sensor Short Circuit
Failure code [879BKA] A/C Outer Sensor Open Circuit
Failure code [879BKB] A/C Outer Sensor Short Circuit
Failure code [879CKA] Ventilating Sensor Open Circuit
Failure code [879CKB] Ventilating Sensor Short Circuit
Failure code [879EMC] Ventilation Damper Abnormality
Failure code [879FMC] Air Mix Damper Abnormality
Failure code [879GKX] Refrigerant Abnormality
Failure code [989D00] Tilt Caution
Failure code [989L00] Engine Controller Lock Caution1
Failure code [989M00] Engine Controller Lock Caution2
Failure code [989N00] Engine Controller Lock Caution3
Failure code [AA10NX] Air Cleaner Clogging
Failure code [AB00KE] Charge Voltage Low
Failure code [AB00KY] Hot Short of Alternator R Terminal
Failure code [B@BAZG] Eng Oil Press Low
Failure code [B@BAZK] Engine Oil Level Low
Failure code [B@BCNS] Eng Water Overheat
Failure code [B@BCZK] Eng Water Level Low
Failure code [B@C6NS] Retarder Oil Overheat (Front)
Failure code [B@C8NS] Retarder Oil Overheat (Center)
Failure code [B@CENS] T/C Oil Temp. Overheat
Failure code [B@JANS] Steering Oil Overheat
Failure code [CA111] ECM Critical Internal Failure
Failure code [CA115] Eng Ne and Bkup Speed Sens Error
Failure code [CA122] Chg Air Press Sensor High Error
Failure code [CA123] Chg Air Press Sensor Low Error
Failure code [CA131] Throttle Sensor High Error
Failure code [CA132] Throttle Sensor Low Error
Failure code [CA135] Eng Oil Press Sensor High Error
Failure code [CA141] Eng Oil Press Sensor Low Error
Failure code [CA144] Coolant Temp Sens High Error
Failure code [CA145] Coolant Temp Sens Low Error
Failure code [CA153] Chg Air Temp Sensor High Error
Failure code [CA154] Chg Air Temp Sensor Low Error
Failure code [CA187] Sensor 2 Supply Volt Low Error
Failure code [CA221] Ambient Press Sensor High Error
Failure code [CA222] Ambient Press Sens Low Error
Failure code [CA227] Sensor 2 Supply Volt High Error
Failure code [CA234] Eng Overspeed
Failure code [CA238] Ne Speed Sensor Supply Volt Error
Failure code [CA263] Fuel Temp Sensor High Error
Failure code [CA265] Fuel Temp Sensor Low Error
Failure code [CA271] IMV/PCV1 Short Error
Failure code [CA272] IMV/PCV1 Open Error
Failure code [CA273] PCV2 Short Error
Failure code [CA274] PCV2 Open Error
Failure code [CA322] Inj #1(L#1) Open/Short Error
Failure code [CA323] Inj #5(L#5) Open/Short Error
Failure code [CA324] Inj #3(L#3) Open/Short Error
Failure code [CA325] Inj #6(L#6) Open/Short Error
Failure code [CA331] Inj #2(L#2) Open/Short Error
Failure code [CA332] Inj #4(L#4) Open/Short Error
Failure code [CA342] Calibration Code Incompatibility
Failure code [CA351] Injectors Drive Circuit Error
Failure code [CA352] Sensor 1 Supply Volt Low Error
Failure code [CA386] Sensor 1 Supply Volt High Error
Failure code [CA431] Idle Validation Sw Error
Failure code [CA432] Idle Validation Process Error
Failure code [CA441] Battery Voltage Low Error
Failure code [CA442] Battery Voltage High Error
Failure code [CA449] Rail Press Very High Error
Failure code [CA451] Rail Press Sensor High Error
Failure code [CA452] Rail Press Sensor Low Error
Failure code [CA553] Rail Press High Error
Failure code [CA554] Rail Press Sensor In Range Error
Failure code [CA559] Rail Press Low Error
Failure code [CA689] Eng Ne Speed Sensor Error
Failure code [CA731] Eng Bkup Speed Sens Phase Error
Failure code [CA757] All Continuous Data Lost Error
Failure code [CA778] Eng Bkup Speed Sensor Error
Failure code [CA1228] EGR valve servo error 1
Failure code [CA1625] EGR Valve Servo Error 2
Failure code [CA1626] Bypass Valve Solenoid Current High Error
Failure code [CA1627] Bypass Valve Solenoid Current Low Error
Failure code [CA1628] Bypass Valve Servo Error 1
Failure code [CA1629] Bypass Valve Servo Error 2
Failure code [CA1631] BP valve Lift Position Sensor High Error
Failure code [CA1632] BP valve Lift Position Sensor Low Error
Failure code [CA2185] Throt Sensor Sup Volt High Error
Failure code [CA2186] Throt Sensor Sup Volt Low Error
Failure code [CA2249] Rail Press Very Low Error
Failure code [CA2271] EGR Valve Pos Sens High Error
Failure code [CA2272] EGR Valve Pos Sens Low Error
Failure code [CA2351] EGR Valve Solenoid Short Error
Failure code [CA2352] EGR Valve Solenoid Open Error
Failure code [CA2555] Grid Htr Relay Volt Low Error
Failure code [CA2556] Grid Htr Relay Volt High Error
Failure code [D150KB] Ground Fault of Emerg. Steering Relay
Failure code [D150KZ] Failure of Emerg. Steering Relay
Failure code [D151KB] Ground Fault of Emerg. Steering Relay 2
Failure code [D151KZ] Failure of Emerg. Steering Relay 2
Failure code [D164KY] Hot Short of Head Light High Selector
Failure code [D19HKZ] Failure of Stop Lamp (R&L)
Failure code [D19JKZ] Personal Code Relay Abnormality
Failure code [D1EHKA] Disconnection of Engine Start Relay
Failure code [D1EHKB] Ground Fault of Engine Start Relay
Failure code [D1EHKY] Hot Short of Engine Start Relay
Failure code [D1EMKA] Disconnection of Parking Interlock Relay
Failure code [D1EMKB] Ground Fault of Parking Interlock Relay
Failure code [D1EMKY] Hot Short of Parking Interlock Relay
Failure code [D1FBKB] Ground Fault of Sol. Self-Holding Relay
Failure code [D5ZHL6] Disconnection of Key SW C
Failure code [D811MC] KOMTRAX Error
Failure code [D862KA] GPS Antenna Open Circuit
Failure code [D8ALKA] Operating Lamp Open Circuit (KOMTRAX)
Failure code [D8ALKB] Operating Lamp Short Circuit (KOMTRAX)
Failure code [D8AQK4] CAN2 Discon (KOMTRAX) 2
Failure code [D8AQKR] CAN2 Discon (KOMTRAX)
Failure code [DAF0KT] Abnormality of Non-volatile Memory (MON)
Failure code [DAF0MB] Monitor ROM Abnormality
Failure code [DAF0MC] Monitor Error
Failure code [DAF3KK] Controller Power Source Low (MON)
Failure code [DAF8KB] Camera Power Supply Short Circuit
Failure code [DAFDKB] Monitor 12V Power Output Short Circuit
Failure code [DAFGMC] GPS Module Error
Failure code [DAFLKA] Operating Lamp Open Circuit (MON)
Failure code [DAFLKB] Operating Lamp Short Circuit (MON)
Failure code [DAFQKR] CAN2 Discon (Monitor)
Failure code [DAQ0KK] Controller Power Source Low (T/M)
Failure code [DAQ0KT] Abnormality of Non-volatile Memory (T/M)
Failure code [DAQ0MC] T/M Con Error
Failure code [DAQ1KA] Disconnection of Key SW ACC (T/M)
Failure code [DAQ2KK] Solenoid Power Source Low (T/M)
Failure code [DAQ9KQ] Inconsistency of Model Selection (T/M)
Failure code [DAQLKA] Operating Lamp Open Circuit (T/M)
Failure code [DAQLKB] Operating Lamp Short Circuit (T/M)
Failure code [DAQQKR] CAN2 Discon (Transmission Con)
Failure code [DAQRKR] CAN1 Discon (Transmission Con)
Failure code [DAQRMA] Inconsistency of Option Selection (T/M)
Failure code [DAZ9KQ] A/C Model Selection Abnormality
Failure code [DAZQKR] CAN2 Discon (Aircon ECU)
Failure code [DB10KT] Abnormality of Non-volatile Memory (RHC)
Failure code [DB10MC] RHC Error
Failure code [DB11KA] Disconnection of Key SW ACC (RHC)
Failure code [DB12KK] Solenoid Power Source Low (RHC)
Failure code [DB13KK] Controller Power Source Low (RHC)
Failure code [DB19KQ] Inconsistency of Model Selection (RHC)
Failure code [DB1LKA] Disconnection of System Ope. Lamp (RHC)
Failure code [DB1LKB] Short Circuit of System Ope. Lamp (RHC)
Failure code [DB1QKR] CAN2 Discon (Retarder Hoist Con)
Failure code [DB1QMA] Inconsistency of Option Selection (RHC)
Failure code [DB1RKR] CAN1 Discon (Retarder Hoist Con)
Failure code [DB2QKR] CAN2 Discon (Engine Con)
Failure code [DBSQKR] CAN2 Discon (PLM)
Failure code [DBSQKQ] Inconsistency of Model Selection (PLM)
Failure code [DD1ML4] Failure of ARAC SW
Failure code [DDAAL6] Discon of Engine Shutdown Secondary Switch
Failure code [DDTHKA] Disconnection of Fill Switch (High)
Failure code [DDTJKA] Disconnection of Fill Switch (Low)
Failure code [DDTKKA] Disconnection of Fill Switch (1st)
Failure code [DDTLKA] Disconnection of Fill Switch (2nd)
Failure code [DDTMKA] Disconnection of Fill Switch (3rd)
Failure code [DDTNKA] Disconnection of Fill Switch (Reverse)
Failure code [DF10KA] Disconnection of Shift Lever Input
Failure code [DF10KB] Ground Fault of Shift Lever Input
Failure code [DGF1KX] Out of Range of T/M Oil Temp. Sensor
Failure code [DGR3KB] Ground Fault of Retarder Oil Temp. S.(C)
Failure code [DGR3L8] Failure of Retarder Oil Temp. Sensor (C)
Failure code [DGR4KB] Ground Fault of Retarder Oil Temp. S.(F)
Failure code [DGR4L8] Failure of Retarder Oil Temp. Sensor (F)
Failure code [DGR6KB] Ground Fault of Steering Oil Temp. S.
Failure code [DGR6L8] Failure of Steering Oil Temp. Sensor
Failure code [DGR7KX] Out of Range of Piston Pump Oil Temp. S.
Failure code [DGR8KX] Out of Range of CAC Output Temp. S.
Failure code [DGT1KX] Out of Range of T/C Oil Temp. Sensor
Failure code [DHP4KY] Hot Short of Suspension Press. S. (FR)
Failure code [DHP4KZ] Failure of Suspension Press. S. (FR)
Failure code [DHP5KY] Hot Short of Suspension Press. S. (FL)
Failure code [DHP5KZ] Failure of Suspension Press. S. (FL)
Failure code [DHP6KY] Hot Short of Suspension Press. S. (RR)
Failure code [DHP6KZ] Failure of Suspension Press. S. (RR)
Failure code [DHP7KY] Hot Short of Suspension Press. S. (RL)
Failure code [DHP7KZ] Failure of Suspension Press. S. (RL)
Failure code [DHQ2KX] Out of Range of Main Flow Sel. Valve S.
Failure code [DHT5KX] Out of Range of T/C Input Pressure Sensor
Failure code [DHT5L6] Failure of T/C Oil Press Sensor
Failure code [DHT8KX] Out of Range of Steering Oil Press. S.
Failure code [DHT8ZG] Steering Oil Pressure Low
Failure code [DHU2KX] Out of Range of Acc. Oil Press. S. (F)
Failure code [DHU3KX] Out of Range of Acc. Oil Press. S. (R)
Failure code [DHUAKX] Out of Range of Retarder Press. S. (CR)
Failure code [DHUBKX] Out of Range of Retarder Press. S. (FR)
Failure code [DHUCKX] Out of Range of Parking Brake Press. S.
Failure code [DHUDKX] Out of Range of Emerg. Steering Press. S.1
Failure code [DHUEKX] Out of Range of Emerg. Steering Press. S.2
Failure code [DHUQKX] Out of Range of Retarder Press. S. (FL)
Failure code [DHURKX] Out of Range of Retarder Press. S. (CL)
Failure code [DJF1KA] Disconnection of Fuel Level Sensor
Failure code [DK30KX] Out of Range of Steering Angle Pot.
Failure code [DK51L5] Failure of Retarder Lever Pot. and RVS
Failure code [DK52KX] Out of Range of Hoist Lever Potentio.
Failure code [DK53L8] Failure of Hoist Lever Potentio.
Failure code [DK54KX] Out of Range of Body Potentio.
Failure code [DK60KX] Out of Range of Acceleration Sensor
Failure code [DKH0KX] Out of Range of Inclination Angle Sensor
Failure code [DKH1KX] Out of Range of Long. Inclination Angle S.
Failure code [DLF1KA] Disconnection of T/M Input Speed Sensor
Failure code [DLF1LC] Failure of T/M Input Speed Sensor
Failure code [DLF2KA] Disconnection of T/M Inter. Speed Sensor
Failure code [DLF2LC] Failure of T/M Intermediate Speed Sensor
Failure code [DLF400] T/M Diff. Overrun Prevention Activated
Failure code [DLF4KA] Disconnection of T/M Diff. Speed Sensor
Failure code [DLF4LC] Failure of T/M Diff. Speed Sensor
Failure code [DLF6LC] Failure of Wheel Speed Sensor (FR)
Failure code [DLF7LC] Failure of Wheel Speed Sensor (FL)
Failure code [DLFDLC] Failure of Wheel Speed Sensor (CR)
Failure code [DLFELC] Failure of Wheel Speed Sensor (CL)
Failure code [DLFFLC] Failure of Wheel Speed Sensor (Front)
Failure code [DLFGLC] Failure of Wheel Speed Sensor (Center)
Failure code [DLM3KA] Disconnection of Radiator Fan Speed Sensor
Failure code [DLM3LC] Failure of Radiator Fan Speed Sensor
Failure code [DLM3MB] Radiator Fan Control Mismatch
Failure code [DLM4KA] Disconnection of CAC Fan Speed Sensor
Failure code [DLM4LC] Failure of CAC Fan Speed Sensor
Failure code [DLM4MB] CAC Fan Control Mismatch
Failure code [DLT3KA] Disconnection of Output Speed Sens. (Main)
Failure code [DLT3LC] Failure of Output Speed Sensor (Main)
Failure code [DPQ1KR] LIN Discon (Switch Panel)
Failure code [DPQ2KR] LIN Discon (LED Unit)
Failure code [DPQ3KR] LIN Discon (Rear View Monitor)
Failure code [DSJ0KR] CAN2 Discon (Meter Unit)
Failure code [DV00KB] Ground Fault of Buzzer Output
Failure code [DW2BKA] Disconnection of Main Flow Selector Sol.
Failure code [DW2BKB] Ground Fault of Main Flow Selector Sol.
Failure code [DW2BKY] Hot Short of Main Flow Selector Sol.
Failure code [DW2BL1] Release Trouble of Main Flow Sel. Valve
Failure code [DW2BLH] Malfunction of Main Flow Selector Valve
Failure code [DW4BK4] Release Trouble of Parking Brake Valve
Failure code [DW4BMA] Malfunction of Parking Brake Valve
Failure code [DW72KZ] Failure of Kick out Solenoid
Failure code [DW73KA] Disconnection of Hoist Selector Sol.
Failure code [DW73KB] Ground Fault of Hoist Selector Sol.
Failure code [DW73KY] Hot Short of Hoist Selector Sol.
Failure code [DW7BKB] Ground Fault of Radiator Fan Rev. Sol.
Failure code [DW7BKY] Hot Short of Radiator Fan Rev. Sol.
Failure code [DW7BKZ] Failure of Radiator Fan Rev. Sol.
Failure code [DW7LKB] Ground Fault of CAC Fan Rev. Sol.
Failure code [DW7LKY] Hot Short of CAC Fan Rev. Sol.
Failure code [DW7LKZ] Failure of CAC Fan Rev. Sol.
Failure code [DW7NKZ] Failure of Steering Pump Selector Sol.
Failure code [DWNJKZ] Failure of TCS Shut off Sol. (Front)
Failure code [DWNKKZ] Failure of TCS Shut off Sol. (Center)
Failure code [DX13KA] Disconnection of Hoist EPC Solenoid
Failure code [DX13KB] Ground Fault of Hoist EPC Solenoid
Failure code [DX13KY] Hot Short of Hoist EPC Solenoid
Failure code [DX16KA] Disconnection of Rad. Fan Pump EPC Sol.
Failure code [DX16KB] Ground Fault of Rad. Fan Pump EPC Sol.
Failure code [DX16KY] Hot Short of Radiator Fan Pump EPC Sol.
Failure code [DX29KA] Disconnection of CAC Fan Pump EPC Sol.
Failure code [DX29KB] Ground Fault of CAC Fan Pump EPC Sol.
Failure code [DX29KY] Hot Short of CAC Fan Pump EPC Sol.
Failure code [DX30K4] Release Trouble of Retarder EPC Valve(FL)
Failure code [DX30KA] Disconnection of Retarder EPC Sol. (FL)
Failure code [DX30KB] Ground Fault of Retarder EPC Sol. (FL)
Failure code [DX30KY] Hot Short of Retarder EPC Sol. (FL)
Failure code [DX30MA] Malfunction of Retarder EPC Valve (FL)
Failure code [DX31K4] Release Trouble of Retarder EPC Valve(CR)
Failure code [DX31KA] Disconnection of Retarder EPC Sol. (CR)
Failure code [DX31KB] Ground Fault of Retarder EPC Sol. (CR)
Failure code [DX31KY] Hot Short of Retarder EPC Sol. (CR)
Failure code [DX31MA] Malfunction of Retarder Valve (CR)
Failure code [DX32K4] Release Trouble of Retarder EPC Valve(CL)
Failure code [DX32KA] Disconnection of Retarder EPC Sol. (CL)
Failure code [DX32KB] Ground Fault of Retarder EPC Sol. (CL)
Failure code [DX32KY] Hot Short of Retarder EPC Sol. (CL)
Failure code [DX32MA] Malfunction of Retarder EPC Valve (CL)
Failure code [DX33K4] Release Trouble of Retarder EPC Valve (FR)
Failure code [DX33KA] Disconnection of Retarder EPC Sol. (FR)
Failure code [DX33KB] Ground Fault of Retarder EPC Sol. (FR)
Failure code [DX33KY] Hot Short of Retarder EPC Sol. (FR)
Failure code [DX33MA] Malfunction of Retarder EPC Valve (FR)
Failure code [DX34KA] Disconnection of Remote Cooling EPC Sol.
Failure code [DX34KB] Ground Fault of Remote Cooling EPC Sol.
Failure code [DX34KY] Hot Short of Remote Cooling EPC Sol.
Failure code [DXH0KA] Disconnection of ECMV (Inter-Axle Diff.)
Failure code [DXH0KB] Ground Fault of ECMV (Inter-Axle Diff.)
Failure code [DXH0KY] Hot Short of ECMV (Inter-Axle Diff.)
Failure code [DXH1KA] Disconnection of ECMV Solenoid (Lockup)
Failure code [DXH1KB] Ground Fault of ECMV Solenoid (Lockup)
Failure code [DXH1KY] Hot Short of ECMV Solenoid (Lockup)
Failure code [DXH2KA] Disconnection of ECMV Solenoid (High)
Failure code [DXH2KB] Ground Fault of ECMV Solenoid (High)
Failure code [DXH2KY] Hot Short of ECMV Solenoid (High)
Failure code [DXH3KA] Disconnection of ECMV Solenoid (Low)
Failure code [DXH3KB] Ground Fault of ECMV Solenoid (Low)
Failure code [DXH3KY] Hot Short of ECMV Solenoid (Low)
Failure code [DXH4KA] Disconnection of ECMV Solenoid (1st)
Failure code [DXH4KB] Ground Fault of ECMV Solenoid (1st)
Failure code [DXH4KY] Hot Short of ECMV Solenoid (1st)
Failure code [DXH5KA] Disconnection of ECMV Solenoid (2nd)
Failure code [DXH5KB] Ground Fault of ECMV Solenoid (2nd)
Failure code [DXH5KY] Hot Short of ECMV Solenoid (2nd)
Failure code [DXH6KA] Disconnection of ECMV Solenoid (3rd)
Failure code [DXH6KB] Ground Fault of ECMV Solenoid (3rd)
Failure code [DXH6KY] Hot Short of ECMV Solenoid (3rd)
Failure code [DXH7KA] Disconnection of ECMV Solenoid (Reverse)
Failure code [DXH7KB] Ground Fault of ECMV Solenoid (Reverse)
Failure code [DXH7KY] Hot Short of ECMV Solenoid (Reverse)
Failure code [DY30MA] Malfunction 1 of Emerg. Steering Motor
Failure code [DY30MC] Malfunction 2 of Emerg. Steering Motor
Failure code [DY30ME] Emerg. Steering Long-Time Activated
Failure code [DY32MC] Malfunction 2 of Emerg. Steering Motor 2
Troubleshooting of electrical system (E-mode)
E-1 Engine does not start (Engine does not crank)
E-2 Manual preheating system does not work
E-3 Automatic preheating system does not work
E-4 While preheating is working, preheating monitor does not light up
E-5 All of LCD unit, LED unit and meter unit on machine monitor display nothing
E-6 LCD unit on machine monitor displays nothing
E-7 Backlight of LCD unit on machine monitor is abnormal (Backlight goes out or flickers)
E-8 LCD on machine monitor does not display properly
E-9 Meter unit display on machine monitor is abnormal
E-10 Night lighting lamp of meter unit on machine monitor is abnormal
E-11 LED unit lamp on machine monitor is abnormal
E-12 Night lighting lamp of switch panel on machine monitor is abnormal or switches does not operate properly
E-13 2 switches operation of switch panel on machine monitor does not function
E-14 Switch panel buzzer of machine monitor is abnormal
E-15 Rear view monitor does not light up or backlight flickers
E-16 Rear view monitor images are not displayed clearly
E-17 Rear view monitor brightness cannot be adjusted
E-18 Night lighting lamp of rear view monitor is abnormal
E-19 Rearview monitor does not display images while reverse linked display function is enabled
E-20 Guide line on rear view monitor is not displayed while guide line is set
E-21 Some items of gauges and caution lamps on machine monitor are not displayed properly
E-22 Fuel level gauge does not indicate correct level
E-23 Seat belt caution lamp indication is abnormal
E-24 Machine monitor cannot be operated when starting switch is in OFF position
E-25 Alarm buzzer does not sound
E-26 Alarm buzzer does not stop sounding
E-27 Engine mode selector function does not operate properly
E-28 AISS function does not operate properly
E-29 Hoist lever does not operate properly
E-30 Turn signal lamp and winker lamp (hazard lamp) do not operate properly
E-31 None of headlamp, clearance lamp, and tail lamp lights
E-32 Clearance lamp does not light up
E-33 Tail lamp does not light up
E-34 Low beam of headlamp does not light up
E-35 High beam of headlamp does not light up
E-36 Neither Low beam nor High beam of headlamp lights up
E-37 High beams do not light up while passing switch is operated
E-38 KOMTRAX does not operate properly
Troubleshooting of hydraulic and mechanical system (H-mode)
Information described in troubleshooting table (H-mode)
System chart of hydraulic and mechanical systems
Failure mode and cause table
H-1 Machine does not start
H-2 Machine does not travel smoothly (engine hunts)
H-3 Lockup clutch is not disengaged
H-4 Abnormally large shocks result from starting of machine and gear shifting
H-5 Machine does not upshift
H-6 Machine lacks travel speed or power during travel in lockup drive mode through all gear speeds
H-7 Machine lacks travel speed or power during travel in torque converter drive mode
H-8 Machine lacks travel speed or power during travel in specific gear speed
H-9 Machine starts or gear speed shifts with long time lag
H-10 Torque converter oil temperature is high
H-11 Torque converter oil pressure is low
H-12 Front brake does not work sufficiently
H-13 Center brake does not work sufficiently
H-14 Steering wheel is heavy to turn
H-15 Steering wheel does not move
H-16 Steering wheel swings
H-17 Dump body raise speed or power is slow
H-18 Dump body does not move
H-19 Hydraulic drift of dump body is large
H-20 Radiator fan speed is abnormal (high, low, or stationary)
H-21 Aftercooler fan speed is abnormal (high, low, or stationary)
H-22 Unusual noise is heard from around radiator fan
H-23 Unusual noise is heard from around aftercooler fan
Troubleshooting of engine (S-mode)
Information mentioned in troubleshooting table (S mode)
S-1 When starting switch is turned to START position, engine is not cranked
S-2 The engine cranks but exhaust smoke does not come out
S-3 Fuel is injected but engine does not start (incomplete combustion, engine seems to start but does not)
S-4 Engine startability is poor
S-5 Engine does not pick up smoothly
S-6 Engine stops during operation
S-7 Engine runs rough or is unstable
S-8 Engine lacks power
S-9 Exhaust smoke is black
S-10 Engine oil consumption is excessive
S-11 Oil becomes contaminated quickly
S-12 Fuel consumption is excessive
S-13 Oil is in coolant (or coolant spurts or coolant level goes down)
S-14 Oil pressure drops
S-15 Fuel mixes into engine oil
S-16 Water mixes into engine oil (milky)
S-17 Coolant temperature rises too high (overheating)
S-18 Unusual noise is heard
S-19 Vibration is excessive
S-20 Air cannot be bled from fuel circuit

50 Disassembly and assembly
Table of contents
Related information on disassembly and assembly
How to read this manual
Coating materials list
Special tools list
Sketches of special tools
Engine and cooling system
Removal and installation of supply pump assembly
Removal and installation of injector assembly
Removal and installation of cylinder head assembly
Removal and installation of radiator assembly
Removal and installation of radiator core assembly
Removal and installation of cooling fan and fan motor assembly for radiator
Removal and installation of aftercooler assembly
Removal and installation of cooling fan and fan motor assembly for aftercooler
Removal and installation of engine assembly
Removal and installation of engine front oil seal
Removal and installation of engine rear oil seal
Removal and installation of output shaft assembly
.1 Removal:HM400_3R-CB30-520 K 00 A
Disassembly and assembly of output shaft assembly
Removal and installation of air cleaner assembly
Removal and installation of EGR (Exhaust Gas Recirculation) valve assembly
Removal and installation of EGR (Exhaust Gas Recirculation) cooler assembly
Removal and installation of fire prevention cover on exhaust pipe
Power train
Removal and installation of transmission and front differential assembly
Disconnection and connection of front differential assembly and transmission assembly
Disassembly and assembly of front differential assembly
Disassembly and assembly of torque converter assembly
Disassembly and assembly of transmission assembly
Removal and installation of center differential assembly
Disassembly and assembly of center differential assembly
Removal and installation of rear differential assembly
Disassembly and assembly of rear differential assembly
Removal and installation of front final drive and brake assembly
Disassembly and assembly of front final drive and brake assembly
Removal and installation of center final drive and brake assembly
Disassembly and assembly of center final drive and brake assembly
Removal and installation of rear final drive assembly
Disassembly and assembly of rear final drive assembly
Removal and installation of center axle assembly
Removal and installation of rear axle assembly
Steering system
Disassembly and assembly of steering cylinder assembly
Undercarriage and frame
Removal and installation of front suspension cylinder assembly
Removal and installation of rear suspension cylinder assembly
Disassembly and assembly of suspension cylinder assembly
Removal and installation of equalizer bar assembly
Removal and installation of front wheel assembly
Removal and installation of rear (front side) wheel assembly
Removal and installation of rear (back side) wheel assembly
Removal and installation of hitch frame assembly
Disassembly and assembly of hitch frame assembly
Hydraulic system
Removal and installation of flow amplifier valve assembly
Removal and installation of hoist valve assembly
Disassembly and assembly of hoist valve assembly
Disassembly and assembly of hoist cylinder assembly
Body
Removal and installation of dump body assembly
Cab and its attachments
Removal and installation of operator's cab assembly
Removal and installation of operator's cab glass (adhered glass)
Removal and installation of operator's seat assembly
Removal and installation of seat belt
Electrical system
Removal and installation of machine monitor assembly
Removal and installation of engine controller assembly
Removal and installation of retarder and hoist controller assembly
Removal and installation of transmission controller assembly
Removal and installation of KOMTRAX terminal assembly
Air conditioner unit
Removal and installation of air conditioner unit assembly
Removal and installation of air conditioner compressor assembly
Removal and installation of air conditioner condenser

60 Maintenance standard
Table of contents
Engine and cooling system
Engine mount
Output shaft
Radiator fan pump
Radiator fan motor
Aftercooler fan motor
Power train
Drive shaft
Torque converter and transmission mount
Torque converter
Transmission
Transmission control valve
Forward and reverse clutch ECMV and gear speed clutch ECMV
Lockup clutch ECMV
Differential lock clutch ECMV
Main relief valve, torque converter relief valve, and main flow selector valve
Differential
Axle
Final drive
Steering system
Steering column
Steering cylinder
Emergency steering pump
Brake system
Slack adjuster
Brake
Parking brake
Undercarriage and frame
Suspension
Suspension cylinder
Oscillation hitch
Hydraulic system
Steering and hoist pump
Pump for driving torque converter, transmission, aftercooler fan, and center brake cooling motors
Center brake cooling pump
Brake charge pump
Center brake cooling remote pump
Center brake cooling remote motor
Hoist valve
Hoist cylinder

80 Appendix
Table of contents
Air conditioner components
Precautions for refrigerant
Air conditioner component
Configuration and function of refrigeration cycle
Outline of refrigeration cycle
Air conditioner unit
Dual pressure switch
Air conditioner controller
Compressor
Condenser
Receiver drier
Outer temperature sensor (outside air temperature sensor)
Procedure for testing and troubleshooting
Circuit diagram and arrangement of connector pins
System diagram
Input and output signals of the air conditioner controller
Parts and connectors layout
Testing air leakage (duct)
Testing with self-diagnosis function
How to open the electrical system abnormality record screen in service mode of the machine monitor
Testing vent (mode) changeover
Testing FRESH/RECIRC air changeover
Testing (dual) pressure switch for refrigerant
Testing relays
Troubleshooting chart 1
Troubleshooting chart 2
Information in troubleshooting table
Failure code list related to air conditioner
Failure code [879AKA] A/C Inner sensor Open Circuit
Failure code [879AKB] A/C Inner sensor Short Circuit
Failure code [879BKA] A/C Outer sensor Open Circuit
Failure code [879BKB] A/C Outer sensor Short Circuit
Failure code [879CKA] Ventilating sensor Open Circuit
Failure code [879CKB] Ventilating sensor Short Circuit
Failure code [879EMC] Ventilating Damper Abnormality
Failure code [879FMC] Air Mix Damper Abnormality
Failure code [879GKX] Refrigerant Abnormality
A-1 Troubleshooting for power supply system (Air conditioner does not operate)
A-2 Troubleshooting for compressor and refrigerant system (Air is not cooled)
A-3 Troubleshooting for blower motor system (No air comes out or air flow is abnormal)
A-4 Troubleshooting for FRESH/RECIRC air changeover
Troubleshooting with gauge pressure
Connection of service tool
Precautions for disconnecting and connecting air conditioner piping
Handling of compressor oil

90 Diagrams and drawings
Table of contents
Hydraulic circuit diagram
Symbols in hydraulic circuit diagram
Power train hydraulic circuit diagram
Hydraulic circuit diagram
Electric circuit diagram
Symbols in electric circuit diagram
Inside cab electrical circuit diagram
Outside cab electrical circuit diagram
Electrical circuit diagram of engine

INDEX

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