The Komatsu WA470-7 Wheel Loader is a production loader used for quarry work, feed hoppers, stockpiles, and general material handling. People who reach for the Komatsu WA470-7 Wheel Loader Shop Manual (SEN06006-21) are usually shop mechanics, field techs, or owners trying to keep a machine working without calling the dealer every time. They’re normally looking for correct repair sequences, wiring info, and how to put things back together so they don’t break something twice and spend twice the money.
What this manual helps you do
- Trace electrical faults using circuit diagrams so you can track down no-start, warning light, or sensor problems logically.
- Diagnose engine, transmission, and hydraulic issues with step-by-step checks instead of just throwing parts at it.
- Follow teardown and reassembly procedures for major components like axles, cylinders, and drivetrain so they go back together correctly.
- Check adjustment procedures for linkages, brakes, steering, and machine settings after repairs or component swaps.
- Handle scheduled workshop-level service work beyond basic greasing and filter changes, the stuff most operators’ manuals don’t cover.
Who this is for
This shop manual suits a field tech, shop mechanic, or hands-on owner who’s comfortable with tools and wants dealer-level repair info. If you only need basic daily checks or how to run the machine, you’re better off with the Operation & Maintenance manual instead.
FAQ
Q: Is this a PDF I can search and print?
A: Yes, it’s a PDF you can search by keyword and print pages or sections you want in the workshop.
Q: Does it go deep enough for full overhauls?
A: This kind of shop manual usually covers workshop-level diagnostics, disassembly, inspection, and reassembly for the WA470-7.
Q: How do I know if it matches my exact machine variant?
A: Check your machine’s model tag and match WA470-7, then confirm the book reference SEN06006-21 against your dealer or current paperwork if you’re unsure.
Bottom line: If you’re repairing or diagnosing a Komatsu WA470-7 in a shop or field setting, this is the right manual; if you just operate the loader, you can skip it.
📘 Show Index
Table of Contents:
- 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
- KVGT
- EGR system piping drawing
- EGR system circuit diagram
- EGR valve
- EGR cooler
- KCCV layout drawing
- KCCV ventilator
- KDPF
- Cooling system
- Cooling fan pump
- Cooling fan motor
- Power train
- Power train system
- Drive shaft
- Power train piping drawing
- Transmission control
- Torque converter
- Transmission
- Transmission control valve
- Forward and reverse clutch ECMV and 1st and 2nd clutch ECMV
- 3rd, 4th clutch ECMV
- Lockup clutch ECMV
- Main relief and torque converter relief valve
- Axle
- Differential
- Final drive
- Steering system
- Layout of steering parts
- Steering column
- Joystick steering lever linkage
- Steering pump
- Steering valve
- Orbit-roll valve
- Stop valve
- Emergency steering motor
- Emergency steering pump
- Brake system
- Layout of brake parts
- Charge valve
- Brake valve
- Slack adjuster
- Accumulator (for brake)
- Brake
- Parking brake control
- Parking brake
- Parking brake solenoid valve
- Parking brake emergency release valve
- Undercarriage and frame
- Axle mount and center hinge pin
- Tire
- Hydraulic system
- Hydraulic component layout
- Work equipment control
- Hydraulic tank
- Double type gear pump
- Work equipment pump
- Control valve
- CLSS
- Hydraulic circuit diagram and names of valves
- Accumulator charge valve
- Work equipment lock solenoid valve
- Accumulator (for PPC circuit)
- Accumulator (for ECSS)
- Work equipment
- Work equipment linkage
- Bucket
- Bucket positioner and boom positioner
- Cab and its attachments
- Electrical system
- Engine control system
- Preheating system
- Engine power mode selector circuit
- Engine output limit function
- Automatic warm-up function
- Parking brake control system
- System operating lamp function
- Battery disconnect switch function
- Transmission controller system
- Work equipment control system
- Machine monitor system
- Rear view monitor system
- KOMTRAX system
- System component parts
- Sensor
- 20 STANDARD VALUE TABLE
- Table of contents
- Standard service value table
- Standard value table for engine
- Standard value table for machine
- Standard value table for electrical system
- 30 TESTING AND ADJUSTING
- Table of contents
- Precautions before work
- 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 color
- Test mass air flow and temperature sensor
- Testing and adjusting valve clearance
- Testing compression pressure
- Testing blowby pressure
- Testing engine oil pressure
- Testing EGR valve and KVGT oil pressures
- Testing fuel pressure
- Testing fuel return rate and leakage
- Bleeding air from fuel system
- Testing fuel circuit for leakage
- Handling cylinder cutout mode operation
- Handling no-injection cranking operation
- Testing of KDPF and muffler stack for looseness and damage
- Testing of installed condition of cylinder heads and manifolds
- Testing engine piping for damage and looseness
- Testing and adjusting air conditioner compressor belt tension
- Testing and adjusting alternator belt tension
- Procedures for cleaning fuel doser
- Writing compensation values at replacement of injector and engine controller
- Writing compensation amount for soot accumulation caused by ash on engine controller
- Power train
- Adjusting transmission output speed sensor
- Adjusting transmission input speed sensor
- Flushing procedure for torque converter and transmission hydraulic circuit
- Retrieval of disabled machine due to transmission valve failure
- Testing oil leakage from axle final drive
- Testing drive shaft for looseness, backlash, and damage
- Testing and adjusting power train oil pressure
- Steering system
- Testing directional lever
- Testing steering wheel
- Testing work equipment control lever
- Testing and adjusting steering circuit oil pressure
- Bleeding air from steering cylinder circuit.
- Testing and adjusting steering stopper valve
- Brake system
- Testing brake pedal
- Testing and adjusting brake pedal linkage
- Testing braking performance
- Testing and adjusting of accumulator charge pressure
- Testing of brake accumulator nitrogen gas pressure and procedure for charging brake accumulator with nitrogen gas
- Testing wheel brake oil pressure
- Testing lowering of wheel brake pressure
- Testing wear of wheel brake disc
- Bleeding air from wheel brake circuit
- Bleeding air from brake valve
- Releasing remaining pressure in brake accumulator circuit
- Testing parking brake performance
- Testing parking brake oil pressure
- Testing wear of parking brake disc
- Method of releasing parking brake manually
- Hydraulic system
- Testing cooling fan speed
- Testing cooling fan pump circuit oil pressure
- Bleeding air from hydraulic fan circuit
- Testing and adjusting work equipment EPC oil pressure
- Testing and adjusting work equipment oil pressure
- Bleeding air from work equipment circuit
- Releasing remaining pressure from work equipment circuit
- Testing of ECSS accumulator nitrogen gas pressure and procedure for charging accumulator with nitrogen gas
- Work equipment
- Testing and adjusting bucket position detection lever.
- Testing and adjusting boom position detection lever
- Electrical system
- Adjusting replaced, reassembled or added sensor, controller, etc. with machine monitor
- Special functions of machine monitor
- Adjusting rearview camera angle
- Handling voltage circuit of engine controller
- Handling battery disconnect switch
- Testing diodes
- Pm clinic
- Pm Clinic service
- Check sheet
- 40 Troubleshooting
- Table of contents
- Precautions before work
- Related information on troubleshooting
- Troubleshooting points
- Sequence of events in troubleshooting
- Check before troubleshooting
- Inspection procedure before troubleshooting
- Preparation work for troubleshooting of electrical system
- Classification and procedures for troubleshooting
- Symptom and troubleshooting numbers
- Information in troubleshooting table
- Connector list and layout
- Connector contact identification
- T-branch box and T-branch adapter table
- Fuse location table
- Precautions for KDPF (KCSF and KDOC) Cleaning and Replacement
- Precautions when performing troubleshooting of machine monitor
- Processing procedure of harness checker for troubleshooting of machine monitor LCD unit
- Preparation of dummy temperature sensor (for KDOC and KDPF temperature sensors)
- Preparation of short circuit electrical connector (for failure codes [CA1883] and [CA3135])
- Failure codes table
- Troubleshooting by failure code (display of code)
- Failure code [1500L0]
- Failure code [15SAL1]
- Failure code [15SALH]
- Failure code [15SBL1]
- Failure code [15SBLH]
- Failure code [15SEL1]
- Failure code [15SELH]
- Failure code [15SFL1]
- Failure code [15SFLH]
- Failure code [15SGL1]
- Failure code [15SGLH]
- Failure code [15SHL1]
- Failure code [15SHLH]
- Failure code [2F00MA]
- Failure code [2G42ZG]
- Failure code [2G43ZG]
- Failure code [879AKA]
- Failure code [879AKB]
- Failure code [879BKA]
- Failure code [879BKB]
- Failure code [879CKA]
- Failure code [879CKB]
- Failure code [879DKZ]
- Failure code [879EMC]
- Failure code [879FMC]
- Failure code [989A00]
- Failure code [989L00]
- Failure code [989M00]
- Failure code [989N00]
- Failure code [A1U0N3]
- Failure code [A1U0N4]
- Failure code [AA10NX]
- Failure code [AB00KE]
- Failure code [AB00KY]
- Failure code [B@BAZG]
- Failure code [B@BAZK]
- Failure code [B@BCNS]
- Failure code [B@BCZK]
- Failure code [B@C7NS]
- Failure code [B@CENS]
- Failure code [B@HANS]
- Failure code [CA115]
- Failure code [CA122]
- Failure code [CA123]
- Failure code [CA131]
- Failure code [CA132]
- Failure code [CA135]
- Failure code [CA141]
- Failure code [CA144]
- Failure code [CA145]
- Failure code [CA153]
- Failure code [CA154]
- Failure code [CA187]
- Failure code [CA221]
- Failure code [CA222]
- Failure code [CA227]
- Failure code [CA234]
- Failure code [CA238]
- Failure code [CA239]
- Failure code [CA271]
- Failure code [CA272]
- Failure code [CA273]
- Failure code [CA274]
- Failure code [CA322]
- Failure code [CA323]
- Failure code [CA324]
- Failure code [CA325]
- Failure code [CA331]
- Failure code [CA332]
- Failure code [CA343]
- Failure code [CA351]
- Failure code [CA352]
- Failure code [CA356]
- Failure code [CA357]
- Failure code [CA386]
- Failure code [CA431]
- Failure code [CA432]
- Failure code [CA441]
- Failure code [CA442]
- Failure code [CA449]
- Failure code [CA451]
- Failure code [CA452]
- Failure code [CA515]
- Failure code [CA516]
- Failure code [CA553]
- Failure code [CA555]
- Failure code [CA556]
- Failure code [CA559]
- Failure code [CA595]
- Failure code [CA687]
- Failure code [CA689]
- Failure code [CA691]
- Failure code [CA692]
- Failure code [CA697]
- Failure code [CA698]
- Failure code [CA731]
- Failure code [CA778]
- Failure code [CA1117]
- Failure code [CA1664]
- Failure code [CA1691]
- Failure code [CA1695]
- Failure code [CA1696]
- Failure code [CA1843]
- Failure code [CA1844]
- Failure code [CA1879]
- Failure code [CA1881]
- Failure code [CA1883]
- Failure code [CA1921]
- Failure code [CA1922]
- Failure code [CA1923]
- Failure code [CA1924]
- Failure code [CA1925]
- Failure code [CA1927]
- Failure code [CA1928]
- Failure code [CA1942]
- Failure code [CA1963]
- Failure code [CA1977]
- Failure code [CA1993]
- Failure code [CA2185]
- Failure code [CA2186]
- Failure code [CA2249]
- Failure code [CA2265]
- Failure code [CA2266]
- Failure code [CA2271]
- Failure code [CA2272]
- Failure code [CA2349]
- Failure code [CA2353]
- Failure code [CA2357]
- Failure code [CA2381]
- Failure code [CA2382]
- Failure code [CA2383]
- Failure code [CA2386]
- Failure code [CA2387]
- Failure code [CA2555]
- Failure code [CA2556]
- Failure code [CA2637]
- Failure code [CA2639]
- Failure code [CA2732]
- Failure code [CA2733]
- Failure code [CA2741]
- Failure code [CA2765]
- Failure code [CA2878]
- Failure code [CA2881]
- Failure code [CA3133]
- Failure code [CA3134]
- Failure code [CA3135]
- Failure code [CA3167]
- Failure code [CA3251]
- Failure code [CA3253]
- Failure code [CA3254]
- Failure code [CA3255]
- Failure code [CA3256]
- Failure code [CA3311]
- Failure code [CA3312]
- Failure code [CA3313]
- Failure code [CA3314]
- Failure code [CA3315]
- Failure code [CA3316]
- Failure code [CA3317]
- Failure code [CA3318]
- Failure code [CA3319]
- Failure code [CA3321]
- Failure code [CA3322]
- Failure code [CA3419]
- Failure code [CA3421]
- Failure code [D150KA]
- Failure code [D150KB]
- Failure code [D150KY]
- Failure code [D160KA]
- Failure code [D160KB]
- Failure code [D160KY]
- Failure code [D191KA]
- Failure code [D191KB]
- Failure code [D191KY]
- Failure code [D192KA]
- Failure code [D192KB]
- Failure code [D192KY]
- Failure code [D193KA]
- Failure code [D193KB]
- Failure code [D193KY]
- Failure code [D193MC]
- Failure code [D19JKZ]
- Failure code [D1E6KA]
- Failure code [D1E6KB]
- Failure code [D1E6KY]
- Failure code [D5ZHKA]
- Failure code [D5ZHKB]
- Failure code [D5ZHKZ]
- Failure code [D5ZHL6]
- Failure code [D811MC]
- Failure code [D862KA]
- Failure code [D8ALKA]
- Failure code [D8ALKB]
- Failure code [D8AQK4]
- Failure code [D8AQKR]
- Failure code [DAF0KT]
- Failure code [DAF0MB]
- Failure code [DAF0MC]
- Failure code [DAF3KK]
- Failure code [DAF8KB]
- Failure code [DAFDKB]
- Failure code [DAFGMC]
- Failure code [DAFLKA]
- Failure code [DAFLKB]
- Failure code [DAFQKR]
- Failure code [DAQ0KK]
- Failure code [DAQ0KT]
- Failure code [DAQ0MC]
- Failure code [DAQ1KA]
- Failure code [DAQ2KK]
- Failure code [DAQ4KB]
- Failure code [DAQ9KQ]
- Failure code [DAQLKA]
- Failure code [DAQLKB]
- Failure code [DAQQKR]
- Failure code [DAQRKR]
- Failure code [DAQRMA]
- Failure code [DAZ9KQ]
- Failure code [DAZQKR]
- Failure code [DB2QKR]
- Failure code [DB2RKR]
- Failure code [DB90KK]
- Failure code [DB90KT]
- Failure code [DB90MC]
- Failure code [DB91KA]
- Failure code [DB92KK]
- Failure code [DB95KX]
- Failure code [DB96KX]
- Failure code [DB99KQ]
- Failure code [DB9LKA]
- Failure code [DB9LKB]
- Failure code [DB9QKR]
- Failure code [DB9RKR]
- Failure code [DB9RMA]
- Failure code [DBE5KX]
- Failure code [DBE6KX]
- Failure code [DD1ALD]
- Failure code [DDAAL6]
- Failure code [DDB6L4]
- Failure code [DDD1LD]
- Failure code [DDK3KA]
- Failure code [DDK3KB]
- Failure code [DDK4KA]
- Failure code [DDK4KB]
- Failure code [DDK5L4]
- Failure code [DDK6KA]
- Failure code [DDK6KB]
- Failure code [DDNRKY]
- Failure code [DDT0L4]
- Failure code [DDT4LD]
- Failure code [DDT9LD]
- Failure code [DDW9LD]
- Failure code [DDWLLD]
- Failure code [DF10KA]
- Failure code [DF10KB]
- Failure code [DGF1KA]
- Failure code [DGF1KB]
- Failure code [DGH2KX]
- Failure code [DGR2KB]
- Failure code [DGR2KZ]
- Failure code [DGT1KA]
- Failure code [DGT1KB]
- Failure code [DH21KA]
- Failure code [DH21KB]
- Failure code [DHA4KA]
- Failure code [DHPCKX]
- Failure code [DHPDKX]
- Failure code [DHT1KX]
- Failure code [DHT5KX]
- Failure code [DHT7KX]
- Failure code [DHT8KA]
- Failure code [DHT8KB]
- Failure code [DHT8ZG]
- Failure code [DHUDKA]
- Failure code [DHUDKB]
- Failure code [DJF1KA]
- Failure code [DK55KA]
- Failure code [DK55KY]
- Failure code [DK55L5]
- Failure code [DK59KA]
- Failure code [DK59KY]
- Failure code [DK59L8]
- Failure code [DK5AKA]
- Failure code [DK5AKY]
- Failure code [DK5BKA]
- Failure code [DK5BKY]
- Failure code [DK5BL8]
- Failure code [DK5CKA]
- Failure code [DK5CKY]
- Failure code [DK5DKA]
- Failure code [DK5DKY]
- Failure code [DK5DL8]
- Failure code [DK5EKA]
- Failure code [DK5EKY]
- Failure code [DK5FKA]
- Failure code [DK5FKY]
- Failure code [DK5FL8]
- Failure code [DK5GKA]
- Failure code [DK5GKY]
- Failure code [DKA0KA]
- Failure code [DKA0KY]
- Failure code [DKA0L0]
- Failure code [DKA1KA]
- Failure code [DKA1KY]
- Failure code [DLF1KA]
- Failure code [DLF1LC]
- Failure code [DLM3KA]
- Failure code [DLM3LC]
- Failure code [DLT3KA]
- Failure code [DLT3LC]
- Failure code [DPQ1KR]
- Failure code [DPQ2KR]
- Failure code [DPQ3KR]
- Failure code [DSJ0KR]
- Failure code [DT20KB]
- Failure code [DT22KB]
- Failure code [DV00KB]
- Failure code [DW4PKA]
- Failure code [DW4PKB]
- Failure code [DW4PKY]
- Failure code [DW4QKA]
- Failure code [DW4QKB]
- Failure code [DW4QKY]
- Failure code [DW4RKA]
- Failure code [DW4RKB]
- Failure code [DW4RKY]
- Failure code [DW4SKA]
- Failure code [DW4SKB]
- Failure code [DW4SKY]
- Failure code [DW7BKA]
- Failure code [DW7BKB]
- Failure code [DW7BKY]
- Failure code [DWM1KA]
- Failure code [DWM1KB]
- Failure code [DWM1KY]
- Failure code [DWN6KA]
- Failure code [DWN6KB]
- Failure code [DWN6KY]
- Failure code [DWN8KA]
- Failure code [DWN8KB]
- Failure code [DWN8KY]
- Failure code [DX16KA]
- Failure code [DX16KB]
- Failure code [DX16KY]
- Failure code [DXA1KA]
- Failure code [DXA1KB]
- Failure code [DXA1KY]
- Failure code [DXANKA]
- Failure code [DXANKB]
- Failure code [DXANKY]
- Failure code [DXH1KA]
- Failure code [DXH1KB]
- Failure code [DXH1KY]
- Failure code [DXH4KA]
- Failure code [DXH4KB]
- Failure code [DXH4KY]
- Failure code [DXH5KA]
- Failure code [DXH5KB]
- Failure code [DXH5KY]
- Failure code [DXH6KA]
- Failure code [DXH6KB]
- Failure code [DXH6KY]
- Failure code [DXH7KA]
- Failure code [DXH7KB]
- Failure code [DXH7KY]
- Failure code [DXH8KA]
- Failure code [DXH8KB]
- Failure code [DXH8KY]
- Failure code [DXHHKA]
- Failure code [DXHHKB]
- Failure code [DXHHKY]
- Failure code [DXHJKA]
- Failure code [DXHJKB]
- Failure code [DXHJKY]
- Failure code [DXHKKA]
- Failure code [DXHKKB]
- Failure code [DXHKKY]
- Failure code [DXHLKA]
- Failure code [DXHLKB]
- Failure code [DXHLKY]
- Failure code [DXHMKA]
- Failure code [DXHMKB]
- Failure code [DXHMKY]
- Failure code [DY30MA]
- Failure code [DY30MC]
- Failure code [DY30ME]
- Failure code [LA00L3]
- Troubleshooting of electrical system (E-mode)
- E-1 The engine does not start
- 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 Caution LED on machine monitor is abnormal
- E-12 LED 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 rearview monitor is abnormal
- E-19 Some items of gauges and caution lamps on machine monitor are not displayed properly
- E-20 Parking brake indicator lamp does not light when the parking brake is set to ON (Parking) position
- E-21 When brake accumulator oil pressure drops, the brake oil pressure caution lamp does not light
- E-22 Air cleaner clogging indicator lamp does not light up
- E-23 Radiator coolant level caution lamp does not light up
- E-24 Indication of hydraulic oil temperature gauge does not increase, or hydraulic oil temperature caution lamp does not light
- E-25 Indication of torque converter oil temperature gauge does not increase, or torque converter oil temperature caution lamp does not light up
- E-26 Fuel level gauge does not indicate correct level
- E-27 Seat belt caution lamp indication is abnormal.
- E-28 Horn does not sound
- E-29 Horn does not stop sounding
- E-30 Alarm buzzer does not sound
- E-31 When starting switch is in ON position, alarm buzzer does not stop sounding
- E-32 Kickdown does not work when kickdown switch is turned on
- E-33 Hold switch does not work when it is pressed
- E-34 Parking brake does not work even if it is applied, or the brake drags when parking brake is released and FR drive is operated
- E-35 Transmission cut-off mode is not selected or not released
- E-36 Transmission cut-off setting cannot be released
- E-37 Directional selector (FNR) switch mode is not selected or not released
- E-38 When operating engine power mode selector switch, engine mode selector function does not operate properly
- E-39 Flow of loader pump does not increase from the minimum rate
- E-40 ECSS function cannot be selected or cannot be released
- E-41 None of headlamp, clearance lamp, and tail lamp light up
- E-42 Clearance lamp and tail lamp do not light up or go out
- E-43 Both high and low beams of headlamp do not light up or go out
- E-44 Low beam of head lamp does not light up or go out
- E-45 High beam of headlamp does not light up or go out
- E-46 Front working lamp does not light up or go out
- E-47 Rear working lamp does not light up or go out
- E-48 All of turn signal lamps and hazard lamps do not light up or go out
- E-49 Turn signal lamps do not light up or go out
- E-50 Hazard lamp does not light up or go out
- E-51 Brake lamp does not light or stays lighted
- E-52 Backup lamp does not light up or does not go out
- E-53 Backup buzzer does not sound or continues to sound
- E-54 Front wiper does not operate
- E-55 Rear wiper does not operate
- E-56 Window washer does not operate
- E-57 Fuel feed pump does not operate or stop automatically
- E-58 Fan does not rotate in reverse
- E-59 Fan remains rotated in reverse
- E-60 KOMTRAX system does not operate normally
- Troubleshooting of hydraulic and mechanical systems (H-mode)
- Information mentioned 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 Torque converter lockup pressure cannot be released (engine stalls)
- H-3 Torque converter lockup clutch does not engage
- H-4 Travel speed is slow, bucket thrust force is weak, gradability is low, or gear speed does not shift
- H-5 Large shock is made when machine moves off or gear is shifted
- H-6 Large time lag is observed when machine starts and gear is shifted
- H-7 Oil temperature of torque converter is high
- H-8 Machine does not turn
- H-9 Turning response is poor
- H-10 Steering wheel is heavy to turn
- H-11 Machine sways or large shocks are made while machine turns
- H-12 Turning radius differs between right and left turns
- H-13 Wheel brakes do not work or are weak
- H-14 Wheel brakes are not released or drag
- H-15 Parking brake does not work or it is weak
- H-16 Parking brake is not released or drags (including emergency release system)
- H-17 When brake pedal is pushed, unusual noise or vibration occurs
from around pedal
- H-18 Boom does not rise
- H-19 Boom moves slow or boom lacks lifting force
- H-20 Rising boom slows down at certain height
- H-21 Lift cylinders do not serve to hold bucket on ground
- H-22 Hydraulic drift of boom is large
- H-23 Boom moves up and down during operation
- H-24 Bucket does not tilt back
- H-25 Bucket moves slow or lacks tilt-back force
- H-26 Bucket decelerates during tilt-back operation
- H-27 Bucket cylinder does not hold bucket on ground
- H-28 Hydraulic drift of bucket is large
- H-29 Bucket tilts back and forth during carrying load (work equipment valve in HOLD).
- H-30 Boom and bucket control levers do not move smoothly and are heavy to move
- H-31 Operating work equipment causes engine speed to lower significantly or engine to stall
- H-32 Large shocks are made when work equipment starts to move and stops
- H-33 When certain work equipment stalls hydraulically, other work equipment moves
- H-34 E.C.S.S. (travel damper) does not work and machine pitches and bounces
- H-35 Bucket does not stop at the position which is set with remote bucket positioner
- H-36 Fan speed is abnormal (too high or low, or fan does not rotate)
- H-37 Unusual noise is heard from around fan
- Troubleshooting of engine (S-mode)
- Information mentioned in troubleshooting table (S-mode)
- S-1 Engine does not crank when starting switch is turned to start position
- S-2 Engine cranks but no exhaust smoke comes 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 KDPF gets clogged in a short time
- 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 back 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
- S-21 Active regeneration is executed frequently
- S-22 Active regeneration takes time
- S-23 White smoke is exhausted during active regeneration
- 50 Disassembly and assembly
- Table of contents
- Precautions before work
- 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 of supply pump assembly
- Installation of supply pump assembly
- Removal and installation of injector assembly
- Removal of injector assembly
- Installation of injector assembly
- Removal and installation of fuel doser assembly
- Removal of fuel doser assembly
- Installation of fuel doser assembly
- Removal and installation of cylinder head assembly
- Removal of cylinder head assembly
- Installation of cylinder head assembly
- Removal and installation of engine hood assembly
- Removal of engine hood assembly
- Installation of engine hood assembly
- Removal and installation of grille assembly
- Removal of grille assembly
- Installation of grille assembly
- Removal and installation of cooling assembly
- Removal of cooling assembly
- Installation of cooling assembly
- Removal and installation of radiator core assembly
- Removal of radiator core assembly
- Installation of radiator core assembly
- Removal and installation of aftercooler
- Removal of aftercooler
- Installation of aftercooler
- Removal and installation of hydraulic oil cooler
- Removal of hydraulic oil cooler
- Installation of hydraulic oil cooler
- Removal and installation of power train oil cooler assembly
- Removal of power train oil cooler assembly
- Installation of power train oil cooler assembly
- Removal and installation of engine assembly
- Removal of engine assembly
- Installation of engine assembly
- Removal and installation of engine front oil seal
- Removal of engine front oil seal
- Installation of engine front oil seal
- Removal and installation of engine rear oil seal
- Removal of engine rear oil seal
- Installation of engine rear oil seal
- Removal and installation of cooling fan and cooling fan motor assembly
- Removal of cooling fan and cooling fan motor assembly
- Installation of cooling fan and cooling fan motor assembly
- Removal and installation of KDPF assembly
- Removal of KDPF assembly
- Installation of KDPF assembly
- Disassembly and assembly of KDPF assembly
- Disassembly of KDPF assembly
- Assembly of KDPF assembly
- Removal and installation of bellows pipe assembly
- Removal of bellows pipe assembly
- Installation of bellows pipe assembly
- Removal and installation of KCCV assembly
- Removal of KCCV assembly
- Installation of KCCV assembly
- Removal and installation of VGT assembly
- Removal of VGT assembly
- Installation of VGT assembly
- Removal and installation of EGR valve assembly
- Removal of EGR valve assembly
- Installation of EGR valve assembly
- Removal and installation of EGR cooler assembly
- Removal of EGR cooler assembly
- Installation of EGR cooler assembly
- Removal and installation of air cleaner assembly
- Removal of air cleaner assembly
- Installation of air cleaner assembly
- Removal and installation of air conditioner compressor belt
- Removal of air conditioner compressor belt
- Installation of air conditioner compressor belt
- Removal and installation of alternator belt
- Removal of alternator belt
- Installation of alternator belt
- Removal and installation of fuel tank assembly
- Removal of fuel tank assembly
- Installation of fuel tank assembly
- Power train
- Removal and installation of torque converter and transmission assembly
- Removal of torque converter and transmission assembly
- Installation of torque converter and transmission assembly
- Disassembly and assembly of transmission assembly
- Disassembly of transmission assembly
- Assembly of transmission assembly
- Disassembly and assembly of torque converter assembly
- Disassembly of torque converter assembly
- Assembly of torque converter assembly
- Disassembly and assembly of transmission clutch pack assembly
- Disassembly of transmission clutch pack assembly
- Assembly of transmission clutch pack assembly
- Removal and installation of front axle assembly
- Removal of front axle assembly
- Installation of front axle assembly
- Removal and installation of rear axle assembly
- Removal of rear axle assembly
- Installation of rear axle assembly
- Disassembly and assembly of axle housing assembly
- Disassembly of axle housing assembly
- Assembly of axle housing assembly
- Disassembly and assembly of differential assembly
- Disassembly of differential assembly
- Assembly of differential assembly
- Steering system
- Removal and installation of steering valve assembly
- Removal of steering valve assembly
- Installation of steering valve assembly
- Brake system
- Removal and installation of brake charge valve assembly
- Removal of brake charge valve assembly
- Installation of brake charge valve assembly
- Removal and installation of parking brake disc and plate
- Removal of parking brake disc and plate
- Installation of parking brake disc and plate
- Undercarriage and frame
- Removal and installation of center hinge pin
- Removal of center hinge pin
- Installation of center hinge pin
- Removal and installation of counterweight assembly
- Removal of counterweight assembly
- Installation of counterweight assembly
- Removal and installation of full-length fender assembly
- Removal of full-length fender assembly
- Installation of full-length fender assembly
- Hydraulic system
- Removal and installation of hydraulic tank assembly
- Removal of hydraulic tank assembly
- Installation of hydraulic tank assembly
- Removal and installation of control valve assembly
- Removal of control valve assembly
- Installation of control valve assembly
- Removal and installation of steering pump and power train pump assembly
- Removal of steering pump and power train pump assembly
- Installation of steering pump and power train pump assembly
- Removal and installation of work equipment pump and cooling fan pump assembly
- Removal of work equipment pump and cooling fan pump assembly
- Installation of work equipment pump and cooling fan pump assembly
- Disassembly and assembly of hydraulic cylinder assembly
- Disassembly of hydraulic cylinder assembly
- Assembly of hydraulic cylinder assembly
- Work equipment
- Removal and installation of work equipment assembly
- Removal of work equipment assembly
- Installation of work equipment assembly
- Cab and its attachments
- Removal and installation of operator's cab and floor frame assembly
- Removal of operator's cab and floor frame assembly
- Installation of operator's cab and floor frame assembly
- Removal and installation of operator's cab glass (adhered glass)
- Removal of operator's cab glass (adhered glass)
- Installation of operator's cab glass (adhered glass)
- Removal and installation of operator's seat assembly
- Removal of operator's seat assembly
- Installation of operator's seat assembly
- Removal and installation of seat belt
- Removal of seat belt
- Installation of seat belt
- Removal and installation of air conditioner unit assembly
- Removal of air conditioner unit assembly
- Installation of air conditioner unit assembly
- Removal and installation of air conditioner compressor assembly
- Removal of air conditioner compressor assembly
- Installation of air conditioner compressor assembly
- Removal and installation of air conditioner condenser assembly
- Removal of air conditioner condenser assembly
- Installation of air conditioner condenser assembly
- Electrical system
- Removal and installation of machine monitor assembly
- Removal of machine monitor assembly
- Installation of machine monitor assembly
- Removal and installation of engine controller assembly
- Removal of engine controller assembly
- Installation of engine controller assembly
- Removal and installation of work equipment controller assembly
- Removal of work equipment controller assembly
- Installation of work equipment controller assembly
- Removal and installation of transmission controller assembly
- Removal of transmission controller assembly
- Installation of transmission controller assembly
- Removal and installation of monitor controller assembly
- Removal of monitor controller assembly
- Installation of monitor controller assembly
- Removal and installation of mass air flow and temperature sensor
- Removal of mass air flow and temperature sensor
- Installation of mass air flow and temperature sensor
- Removal and installation of KOMTRAX terminal assembly
- Removal of KOMTRAX terminal assembly
- Installation of KOMTRAX terminal assembly
- 60 Maintenance standard
- Table of contents
- Engine and cooling system
- Engine related parts
- Cooling fan pump
- Cooling fan motor
- Power train
- Drive shaft
- Torque converter
- Transmission
- Transmission control valve
- Forward and reverse clutch ECMV and 1st and 2nd clutch ECMV
- 3rd, 4th clutch ECMV
- Lockup clutch ECMV
- Main relief and torque converter relief valve
- Axle
- Final drive
- Steering system
- Steering column
- Steering pump
- Steering valve
- Steering cylinder
- Emergency steering pump
- Brake system
- Charge valve
- Slack adjuster
- Brake
- Parking brake
- Parking brake solenoid valve
- Undercarriage and frame
- Axle mount and center hinge pin
- Hydraulic system
- Hydraulic tank
- Double type gear pump
- Work equipment pump
- Control valve
- Work equipment
- Work equipment linkage
- Bucket
- Work equipment cylinder
- 80 Appendix
- Table of contents
- Precautions before work
- Air conditioner components
- Precautions for refrigerant
- Air conditioner components
- Configuration and function of refrigeration cycle
- Outline of refrigeration cycle
- Air conditioner unit
- Dual pressure switch
- Air conditioner controller
- Compressor
- Condenser
- Receiver drier
- Sunlight sensor
- Outer temperature sensor (outside air temperature sensor)
- Procedure for testing and troubleshooting
- Circuit diagram and arrangement of connector pins
- System diagram
- Parts and connectors layout
- Testing with self-diagnosis function
- How to open the electrical system abnormality record screen in service mode of the machine monitor
- Testing temperature control system
- Testing vent (mode) changeover
- Testing FRESH/RECIRC air changeover
- Check evaporator temperature sensor
- Testing relays
- Troubleshooting chart 1
- Troubleshooting chart 2
- Information in troubleshooting table
- Failure code list related to air conditioner
- Failure code [879AKA]
- Failure code [879AKB]
- Failure code [879BKA]
- Failure code [879BKB]
- Failure code [879CKA]
- Failure code [879CKB]
- Failure code [879DKZ]
- Failure code [879EMC]
- Failure code [879FMC]
- A-1 Troubleshooting for power supply and CAN communication 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 hoses and tubes in air conditioner circuit
- Handling of compressor oil
- 90 Diagrams and drawings
- Table of contents
- Hydraulic circuit diagram
- Symbols in hydraulic circuit diagram
- Hydraulic circuit diagram (Steering wheel specifications)
- Hydraulic circuit diagram (Boom RAISE, back tilt)
- Hydraulic circuit diagram (Boom LOWER, turn left, left brake)
- Hydraulic circuit diagram (Joystick steering specifications)
- Hydraulic circuit diagram of power train
- Electric circuit diagram
- Symbols in electric circuit diagram
- Electrical circuit diagram of machine body (1/5)
- Electrical circuit diagram of machine body (2/5)
- Electrical circuit diagram of machine body (3/5)
- Electrical circuit diagram of machine body (4/5)
- Electrical circuit diagram of machine body (5/5)
- Electrical circuit diagram of floor (1/8)
- Electrical circuit diagram of floor (2/8)
- Electrical circuit diagram of floor (3/8)
- Electrical circuit diagram of floor (4/8)
- Electrical circuit diagram of floor (5/8)
- Electrical circuit diagram of floor (6/8)
- Electrical circuit diagram of floor (7/8)
- Electrical circuit diagram of floor (8/8)
- Electrical circuit diagram of floor (EU specifications) (1/8)
- Electrical circuit diagram of floor (EU specifications) (2/8)
- Electrical circuit diagram of floor (EU specifications) (3/8)
- Electrical circuit diagram of floor (EU specifications) (4/8)
- Electrical circuit diagram of floor (EU specifications) (5/8)
- Electrical circuit diagram of floor (EU specifications) (6/8)
- Electrical circuit diagram of floor (EU specifications) (7/8)
- Electrical circuit diagram of floor (EU specifications) (8/8)
- Wiring harness diagram
- Wiring harness diagram (1/30)
- Wiring harness diagram (2/30)
- Wiring harness diagram (3/30)
- Wiring harness diagram (4/30)
- Wiring harness diagram (5/30)
- Wiring harness diagram (6/30)
- Wiring harness diagram (7/30)
- Wiring harness diagram (8/30)
- Wiring harness diagram (9/30)
- Wiring harness diagram (10/30)
- Wiring harness diagram (11/30)
- Wiring harness diagram (12/30)
- Wiring harness diagram (13/30)
- Wiring harness diagram (14/30)
- Wiring harness diagram (15/30)
- Wiring harness diagram (16/30)
- Wiring harness diagram (17/30)
- Wiring harness diagram (18/30)
- Wiring harness diagram (19/30)
- Wiring harness diagram (20/30)
- Wiring harness diagram (21/30)
- Wiring harness diagram (22/30)
- Wiring harness diagram (23/30)
- Wiring harness diagram (24/30)
- Wiring harness diagram (25/30)
- Wiring harness diagram (26/30)
- Wiring harness diagram (27/30)
- Wiring harness diagram (28/30)
- Wiring harness diagram (29/30)
- Wiring harness diagram (30/30)
- INDEX
Komatsu
