Komatsu D37EXi-23, D37PXi-23, D39EXi-23, D39PXS-23 Bulldozer Service Manual
1,700 pages · Publication SEN06486-00
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What's inside
From the manual's own table of contents: 356 sections, 671 entries. See sample pages (PDF, 798 KB)
Index and foreword
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
Specification
Specifications
Specification drawing
Weight table
Table of fuel, coolant, and lubricants
Structure and function
Engine and cooling system
Engine related parts
Show all 356 sections
EGR system piping drawing
EGR system circuit diagram
EGR valve
EGR cooler
KCCV layout drawing
KCCV ventilator
KDOC muffler
Cooling system
Cooling fan motor
Oil cooler bypass and HSTcharge safety valve
Power train
Power train system
Damper
Hydraulic component layout of HST
Steering and brake control
HST pump
HST motor
Charge pump
Solenoid valve
Final drive
Undercarriage and frame
Main frame
Track frame and idler cushion
Hydraulic system
Hydraulic component layout of work equipment
Work equipment control system
Hydraulic tank
CLSS5 topics
- Work equipment and cooling fan pump
- Control valve
- Ripper PPC valve
- Angle control EPC valve
- Accumulator
Work equipment3 topics
- Blade
- Ripper
- Piston valve
Cab and its attachments2 topics
- ROPS cab
- Cab mount
Electrical system5 topics
- Electrical control system
- Machine monitor system
- KOMTRAX system
- System component parts
- Sensor
Standard value tables
Standard service value table3 topics
- Standard value table for engine
- Standard value table for machine
- Standard value table for electrical system
Testing and adjusting
Related information on testing and adjusting28 topics
- Tools for testing and adjusting
- Sketch of tools for testing and adjusting
- Testing engine speed
- Testing exhaust gas color
- Testing and adjusting valve clearance
- Testing compression pressure
- Testing blowby pressure
- Testing engine oil pressure
- 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 installed condition of cylinder heads and manifolds
- Testing engine piping for damage and looseness
- Replacing belt for alternator and air conditioner compressor
- Writing compensation values at replacement of injector and engine controller
- Testing and adjusting HSToil pressure
- Testing outlet pressure of solenoid valve
- Testing if machine travels straight
- Simple test procedure for brake performance
- Adjusting deceleration/brake pedal
- Adjusting parking brake lever
- Move disabled machine urgently
- Adjusting idler clearance
- Checking sprocket wear
- Testing and adjusting track tension
Releasing remaining pressure in work equipment cylinder
Testing and adjusting work equipment oil pressure
Testing source pressure of control circuit
Testing outlet pressure of work equipment EPC valve and fan EPC valve
Isolating the parts causing hydraulic drift in blade and ripper
Testing internal oil leakage of work equipment cylinder
Testing fan speed
Testing fan circuit oil pressure
Bleeding air from hydraulic circuit
Adjusting work equipment lock lever
Adjusting play of blade center ball
Special functions of machine monitor
Special functions of iB monitor
Testing stroke sensor for lift cylinder
Testing stroke sensor for tilt cylinder
Testing stroke sensor for angle cylinder
Testing and adjusting reset sensor for lift cylinder
Testing and adjusting reset sensor for angle cylinder
Adjustment method when HSTcontroller has been replaced
Adjustment method when ICTsensor controller has been replaced
Adjustment method when devices have been repaired or replaced
Adjusting rearview camera angle
Testing windshield wiper operation
Replacing windshield wiper blade
Handling voltage circuit of engine controller
Handling battery disconnect switch
Testing diodes
Pm clinic
Pm Clinic service (D37EXI-23,D37PXI-23)
Pm Clinic service (D39EXI-23,D39PXI-23)
Troubleshooting
Related information on troubleshooting
Troubleshooting points
Sequence of events in troubleshooting
Checks 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
Troubleshooting method for open circuit in wiring harness of pressure sensor system
Connector list and layout
Connector contact identification
T-branch box and T-branch adapter table
Fuse location table
Failure codes table
Troubleshooting by failure code (Display of code)
Failure code [6091NX] HST Oil Filter Clogging
Failure code [989L00] Engine Controller Lock Caution 1
Failure code [989M00] Engine Controller Lock Caution 2
Failure code [989N00] Engine Controller Lock Caution 3
Failure code [AA10NX] Air Cleaner Clogging
Failure code [AB00KE] Charge Voltage Low
Failure code [B@BAZG] Eng Oil Press Low
Failure code [B@BCNS] Eng Water Overheat
Failure code [B@CRNS] HST Oil Overheat59 topics
- Failure code [B@CRZG] HST Charge Press Low
- 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 [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 Sensor 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 [CA239] Ne Speed Sens Supply Volt High Error
- Failure code [CA271] IMV/PCV1 Short Error
- Failure code [CA272] IMV/PCV1 Open Error
- Failure code [CA322] Inj #1(L#1) Open/Short Error
- Failure code [CA324] Inj #3(L#3) 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 [CA343] ECM Critical Internal Failure
- Failure code [CA351] Injectors Drive Circuit Error
- Failure code [CA352] Sensor 1 Supply Volt Low Error
- Failure code [CA356] Mass Air Flow Sensor High Error
- Failure code [CA357] Mass Air Flow Sensor Low Error
- Failure code [CA386] Sensor 1 Supply Volt High Error
- Failure code [CA435] Eng Oil Press Sw 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 [CA466] KVGT Motor Driver Position Error
- Failure code [CA515] Rail Press Sens Sup Volt High Error
- Failure code [CA516] Rail Press Sens Sup Volt Low Error
- Failure code [CA553] Rail Press High Error
- Failure code [CA555] Crankcase Press High Error 1
- Failure code [CA556] Crankcase Press High Error 2
- Failure code [CA559] Rail Press Low Error
- Failure code [CA689] Eng Ne Speed Sensor Error
- Failure code [CA691] Intake Air Temp Sens High Error
- Failure code [CA692] Intake Air Temp Sens Low Error
- Failure code [CA697] ECM Internal Temp Sensor High Error
- Failure code [CA698] ECM Int Temp Sensor Low Error
- Failure code [CA731] Eng Bkup Speed Sens Phase Error
- Failure code [CA778] Eng Bkup Speed Sensor Error
- Failure code [CA1117] Persistent Data Lost Error
- Failure code [CA1695] Sensor 5 Supply Volt High Error
- Failure code [CA1696] Sensor 5 Supply Volt Low Error
- Failure code [CA1843] Crankcase Press Sens High Error
- Failure code [CA1844] Crankcase Press Sens Low Error
- Failure code [CA1896] EGR Valve Stuck Error
- Failure code [CA1942] Crankcase Press Sens In Range Error
- Failure code [CA1961] EGR_Motor Driver IC Over Temp 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 [CA2272] EGR Valve Pos Sens Low Error
Failure code [CA2311] IMV Solenoid Error
Failure code [CA2349] EGR Valve Solenoid Open Error
Failure code [CA2353] EGR Valve Solenoid Short Error
Failure code [CA2357] EGR Valve Servo Error
Failure code [CA2555] Grid Htr Relay Volt Low Error
Failure code [CA2556] Grid Htr Relay Volt High Error
Failure code [CA2765] Inj Trim Data Error
Failure code [CA3419] Mass Air Flow Sensor Sup Volt High Error
Failure code [CA3421] Mass Air Flow Sensor Sup Volt Low Error
Failure code [CA3724] EGR/KVGT Motor Driver Power Low Error
Failure code [CA3918] KVGT Stuck Error
Failure code [CA3919] KVGT Motor Driver IC Over Temp Error
Failure code [CA3921] KVGT Servo Error 2
Failure code [CA3922] KVGT Motor Driver Open Error
Failure code [CA3923] KVGT Motor Driver Short Error
Failure code [D130KA] Neutral relay Open
Failure code [D130KB] Neutral relay Short circuit
Failure code [D130KY] Neutral relay: Hot Short
Failure code [D19JKZ] Personal Code Relay Abnormality
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 [D8AQKR] CAN2 Discon (KOMTRAX)
Failure code [DAF0MB] Monitor ROM Abnormality
Failure code [DAF0MC] Monitor Error
Failure code [DAF8KB] Camera Power Supply Short Circuit
Failure code [DAF9KQ] Model Selection Abnormality
Failure code [DAFGMC] GPS Module Error
Failure code [DAFLKA] Operating Lamp Open Circuit (Monitor)
Failure code [DAFLKB] Operating Lamp Short Circuit (Monitor)
Failure code [DAFQKR] CAN2 Discon (Monitor)
Failure code [DAJ000] HSTcontroller: Abnormality in controller
Failure code [DAJ0KQ] HSTcontroller: Type select signal
Failure code [DAJ0KT] HSTcontroller: Abnormality in controller
Failure code [DAJ0MC] HST Con Error
Failure code [DAJ1KK] HSTcontroller: Source voltage low
Failure code [DAJ2KK] HSTcontroller: Output voltage low
Failure code [DAJ5KK] HST: Sensor volt 5V (0) Out of normal range
Failure code [DAJ6KK] HST: Sensor volt 5V (1) Out of normal range
Failure code [DAJLKA] Operating Lamp Open Circuit (HST Con)
Failure code [DAJLKB] Operating Lamp Short Circuit (HST Con)
Failure code [DAJPMA] Inconsistency of Option Selection (HST)
Failure code [DAJQKR] CAN2 Discon ( HST Con)
Failure code [DAJRKR] CAN1 Discon ( HST Con)
Failure code [DB2QKR] CAN2 Discon (Engine Con)
Failure code [DB2RKR] CAN1 Discon (Engine Con)
Failure code [DBR0KT] ICT Controller: Abnormality in controller
Failure code [DBR0MC] ICT Con Error
Failure code [DBR1KK] ICTcontroller: Source voltage low
Failure code [DBR2KK] ICTcontroller: Output voltage low
Failure code [DBR5KK] ICT: Sensor volt 5V (0) Out of normal range
Failure code [DBRLKA] Operating Lamp Open Circuit (ICT Con)
Failure code [DBRLKB] Operating Lamp Short Circuit (ICT Con)
Failure code [DBRPMA] Inconsistency of Option Selection (ICT)
Failure code [DBRQKR] CAN2 Discon (ICT Con)
Failure code [DBRRKR] CAN1 Discon (ICT Con)59 topics
- Failure code [DBTSKR] LAN Discon (iB Monitor)
- Failure code [DBUTKA] GNSS Antenna Open Circuit
- Failure code [DD12KA] Shift up SW: Open
- Failure code [DD12KB] Shift up SW: Short Circuit
- Failure code [DD13KA] Shift down SW: Open
- Failure code [DD13KB] Shift down SW: Short Circuit
- Failure code [DD14KA] Parking lever SW: Open
- Failure code [DD14KB] Parking lever SW: Short circuit
- Failure code [DDKAKA] Blade float Sw: Open
- Failure code [DDKAKB] Blade float Sw: Short circuit
- Failure code [DDKFL4] Left Angle Sw: Signal mismatch
- Failure code [DDKGL4] Right Angle Sw: Signal mismatch
- Failure code [DDKHKA] iB Sw: Open
- Failure code [DDKHKB] iB Sw: Short circuit
- Failure code [DDNLKA] Weq lock Sw: Open
- Failure code [DDNLKB] Weq lock Sw: Short circuit
- Failure code [DDP6KA] Brake Pressure Sensor: Open
- Failure code [DDP6KB] Brake Pressure Sensor: Hot Short
- Failure code [DDP6MA] Brake pressure sensor: Malfunction
- Failure code [DDU1FS] Parking lever Switch 2: Signal mismatch
- Failure code [DDU1KA] Parking lever Sw2:Open
- Failure code [DDU1KY] Parking lever Sw2:Hot Short
- Failure code [DFA4KX] Blade lift lever: Main and Sub Error
- Failure code [DFA4KZ] Blade lift lever: Main and Sub Error
- Failure code [DFA4L8] Blade lift lever: Signal mismatch
- Failure code [DFA5KA] Blade lift lever1: Open
- Failure code [DFA5KB] Blade lift lever1: Hot Short
- Failure code [DFA6KA] Blade lift lever2: Open
- Failure code [DFA6KB] Blade lift lever2: Hot Short
- Failure code [DFA7KX] Blade tilt lever: Main and Sub Error
- Failure code [DFA7KZ] Blade tilt lever: Main and Sub Error
- Failure code [DFA7L8] Blade tilt lever: Signal mismatch
- Failure code [DFA8KA] Blade tilt lever1: Open
- Failure code [DFA8KB] Blade tilt lever1: Hot Short
- Failure code [DFA9KA] Blade tilt lever2: Open
- Failure code [DFA9KB] Blade tilt lever2: Hot Short
- Failure code [DGS1KA] HSToil temp sensor: Open
- Failure code [DGS1KX] HSToil temp sensor:Out of normal range
- Failure code [DH21KA] Weq pressure sensor: Open
- Failure code [DH21KB] Weq pressure sensor: Hot Short
- Failure code [DHA4KA] Air Cleaner Clog Sensor Open Circuit
- Failure code [DHH7KA] LF HST Pressure Sensor: Open
- Failure code [DHH7KB] LF HST Pressure Sensor: Hot Short
- Failure code [DHH8KA] RF HST Pressure Sensor: Open
- Failure code [DHH8KB] RF HST Pressure Sensor: Hot Short
- Failure code [DHH9KA] LR HST Pressure Sensor: Open
- Failure code [DHH9KB] LR HST Pressure Sensor: Hot Short
- Failure code [DHHAKA] RR HST Pressure Sensor: Open
- Failure code [DHHAKB] RR HST Pressure Sensor: Hot Short
- Failure code [DK30KA] ST lever1: Open
- Failure code [DK30KB] ST lever1: Hot Short
- Failure code [DK30KX] ST lever: Main and Sub Error
- Failure code [DK30KZ] ST lever: Main and Sub Error
- Failure code [DK30L8] ST lever: Signal mismatch
- Failure code [DK31KA] ST lever2: Open
- Failure code [DK31KB] ST lever2: Hot Short
- Failure code [DK40KA] Decel/Brake potentiometer: Open
- Failure code [DK40KB] Decel/Brake potentiometer: Hot Short
- Failure code [DK55KX] FR lever: Main and Sub Error
Failure code [DK55KZ] FR lever: Main and Sub Error
Failure code [DK55L8] FR lever: Signal mismatch
Failure code [DK56KA] FR lever1: Open
Failure code [DK56KB] FR lever1: Hot Short
Failure code [DK57KA] FR lever2: Open
Failure code [DK57KB] FR lever2: Hot Short
Failure code [DK80KA] IMU Sensor: Open
Failure code [DKS0L8] Blade lift Stroke sensor: Signal mismatch
Failure code [DKS1KA] Blade lift Stroke sensor A: Open
Failure code [DKS1KB] Blade lift Stroke sensor A: Hot Short
Failure code [DKS2KA] Blade lift Stroke sensor B: Open
Failure code [DKS2KB] Blade lift Stroke sensor B: Hot Short
Failure code [DKS3KA] Blade lift Reset sensor: Open
Failure code [DKS3KB] Blade lift Reset sensor: Hot Short
Failure code [DKS3MB] Blade lift Reset sensor: Signal mismatch
Failure code [DKS4L8] Blade tilt Stroke sensor: Signal mismatch
Failure code [DKS5KA] Blade tilt Stroke sensor A: Open
Failure code [DKS5KB] Blade tilt Stroke sensor A: Hot Short
Failure code [DKS6KA] Blade tilt Stroke sensor B: Open
Failure code [DKS6KB] Blade tilt Stroke sensor B: Hot Short
Failure code [DKS7MB] Blade tilt Reset sensor: Signal mismatch
Failure code [DKSCL8] Angle left Stroke sensor: Signal mismatch
Failure code [DKSDKA] Angle left Stroke sensor A: Open
Failure code [DKSDKB] Angle left Stroke sensor A: Hot Short
Failure code [DKSEKA] Angle left Stroke sensor B: Open
Failure code [DKSEKB] Angle left Stroke sensor B: Hot Short
Failure code [DKSFKA] Angle left Reset sensor: Open
Failure code [DKSFKB] Angle left Reset sensor: Hot Short
Failure code [DKSFMB] Angle left Reset sensor: Signal mismatch
Failure code [DLM0KX] HST Motor Speed Sensor: Left/Right Error
Failure code [DLM0MA] HST motor speed sensor: Malfunction
Failure code [DLM1KA] Left HST motor speed sensor: Open
Failure code [DLM1KB] Left HST motor speed sensor: Short circuit
Failure code [DLM1MA] Left HST motor speed sensor: Malfunction
Failure code [DLM2KA] Right HST motor speed sensor: Open
Failure code [DLM2KB] Right HST motor speed sensor: Short circuit
Failure code [DLM2MA] Right HST motor speed sensor: Malfunction
Failure code [DLM3KA] Fan Speed Sensor Open Circuit
Failure code [DLM3KB] Fan Speed Sensor Short Circuit
Failure code [DLM3MB] Fan control: Mismatch
Failure code [DN21FS] Decel/Brake pedal SW: Signal mismatch
Failure code [DR21KX] Camera 2 Picture Rev. Drive Abnormality
Failure code [DR31KX] Camera 3 Picture Rev. Drive Abnormality
Failure code [DV20KB] Back-up alarm : Short circuit
Failure code [DW4BKA] Parking brake solenoid: Open
Failure code [DW4BKB] Parking brake solenoid: Short circuit
Failure code [DW4BKY] Parking brake solenoid: Hot Short
Failure code [DW7BKA] Fan reverse solenoid: Open
Failure code [DW7BKB] Fan reverse solenoid: Short circuit
Failure code [DW7EKA] Slow brake solenoid: Open
Failure code [DW7EKB] Slow brake solenoid: Short circuit
Failure code [DW7EKY] Slow brake solenoid: Hot Short
Failure code [DWN5KA] Fan EPC: Open
Failure code [DWN5KB] Fan EPC: Short circuit
Failure code [DWN5KY] Fan EPC: Hot Short
Failure code [DXA4KA] LF HST pump EPC: Open
Failure code [DXA4KB] LF HST pump EPC: Short circuit
Failure code [DXA4KY] LF HST pump EPC: Hot Short
Failure code [DXA5KA] LR HST pump EPC:Open34 topics
- Failure code [DXA5KB] LR HST pump EPC:Short circuit
- Failure code [DXA5KY] LR HST pump EPC: Hot Short
- Failure code [DXA6KA] RF HST pump EPC: Open
- Failure code [DXA6KB] RF HST pump EPC: Short circuit
- Failure code [DXA6KY] RF HST pump EPC: Hot Short
- Failure code [DXA7KA] RR HST pump EPC: Open
- Failure code [DXA7KB] RR HST pump EPC: Short circuit
- Failure code [DXA7KY] RR HST pump EPC: Hot Short
- Failure code [DXHRKA] Blade lift up EPC: Open
- Failure code [DXHRKB] Blade lift up EPC: Short circuit
- Failure code [DXHRKY] Blade lift up EPC: Hot short
- Failure code [DXHSKA] Blade lift down EPC: Open
- Failure code [DXHSKB] Blade lift down EPC: Short circuit
- Failure code [DXHSKY] Blade lift down EPC: Hot short
- Failure code [DXHTKA] Blade tilt left EPC: Open
- Failure code [DXHTKB] Blade tilt left EPC: Short circuit
- Failure code [DXHTKY] Blade tilt left EPC: Hot short
- Failure code [DXHUKA] Blade tilt right EPC: Open
- Failure code [DXHUKB] Blade tilt right EPC: Short circuit
- Failure code [DXHUKY] Blade tilt right EPC: Hot short
- Failure code [DXJ4KA] Weq lock Sol.: Open
- Failure code [DXJ4KB] Weq lock Sol.: Short circuit
- Failure code [DXJCKA] Blade angle left EPC: Open
- Failure code [DXJCKB] Blade angle left EPC: Short circuit
- Failure code [DXJCKY] Blade angle left EPC: Hot short
- Failure code [DXJDKA] Blade angle right EPC: Open
- Failure code [DXJDKB] Blade angle right EPC: Short circuit
- Failure code [DXJDKY] Blade angle right EPC: Hot short
- Failure code [DXK1KA] Left HST motor EPC: Open
- Failure code [DXK1KB] Left HST motor EPC: Short circuit
- Failure code [DXK1KY] Left HST motor EPC: Hot Short
- Failure code [DXK2KA] Right HST motor EPC: Open
- Failure code [DXK2KB] Right HST motor EPC: Short circuit
- Failure code [DXK2KY] Right HST motor EPC: Hot Short
Troubleshooting of electrical system (E-mode)22 topics
- Engine does not start (Engine does not crank)
- Manual preheating system does not work
- Automatic preheating system does not work
- While preheating is working, preheating monitor does not light up
- When starting switch is turned to ON position, machine monitor displays nothing
- Air cleaner clogging monitor lights up in yellow while engine is running
- Charge level monitor lights up in red while engine is running
- Engine coolant temperature monitor lights up in red while engine is running
- Engine oil pressure monitor lights up in red while engine is running
- HSTcharge pressure monitor lights up in red while engine is running
- Hydraulic oil temperature monitor lights up in red while engine is running
- HSToil filter clogging monitor lights up in red while engine is running
- Fuel level gauge does not indicate correct level
- Engine coolant temperature gauge does not indicate correct temperature
- Hydraulic oil temperature gauge does not indicate correct temperature
- Operation mode does not change
- Service mode cannot be selected
- Operating customize switch does not display customize screen
- Modifying setting on customize screen does not change setting of machine
- Service meter is not displayed, while starting switch is in OFF position
- Work equipment does not operate
- Foot heater does not operate
Horn does not sound
Horn does not stop sounding
Backup alarm does not sound
Backup alarm does not stop sounding
Headlamp does not light up
Rear lamp does not light up
No wiper operates continuously or intermittently
Front wiper does not operate
Rear wiper does not operate1 topic
- operations)
Front washer does not operate
Rear washer does not operate
Left door washer does not operate
Right door washer does not operate
KOMTRAX system does not operate normally2 topics
- [Slope sensor not connected!]
- connected!]
iB monitor displays the message [Waiting for radio link
iB monitor displays the message [IMU sensor not connected]
iB monitor displays the message [Waiting for satellites
iB monitor displays the message [Komatsu controller not connected!]
iB monitor displays the message [Cylinder Stroke Reading Abnormal]
iB monitor displays the message [Komatsu CAN Comms Abnormal]
iB monitor displays the message [Komatsu Machine Trouble]
iB monitor displays the message [Waiting to initialize
iB monitor displays the message [System Initializing
iB monitor displays the message [Initializing
iB monitor displays the message [Configuring GPS]
iB monitor displays the message [No GPS Localization
iB monitor displays the message [Low precisions
iB monitor displays the message [Heading Initializing]
iB monitor displays [Out of design area
iB monitor can not be turned on
iB monitor does not display intelligent Machine Control screen
iB monitor does not display bulldozer image
iB monitor does not display design surface
iB monitor touch panel does not respond
iB monitor touch panel is inaccurate
Cylinder stroke reset indication does not go out
Blade automatic lower control does not start while AUTO is displayed
Blade automatic raise control does not start while AUTO is displayed3 topics
- automatic control stops)
- machine
- designed surface or blade does not touch the surface)
Finished surface is inaccurate (The finished surface is not smooth)5 topics
- direction)
- (Shoes frequently slips)
- Machine speed does not increase while blade automatic control is activated
- Blade tilt angle does not coincide with design surface
- Blade tilts back while blade automatic control is activated
Troubleshooting of hydraulic and mechanical system (H-mode)22 topics
- Information described in troubleshooting table (H-mode)
- System chart of hydraulic and mechanical systems
- Failure mode and cause table
- Travel speed or power is low
- Travel speed range does not change
- Shock is large when machine starts or stops
- Machine deviates largely
- Machine drift on a slope is large
- Engine stalls during travel or engine speed drops significantly
- Unusual noise is heard from around HST pump or motor
- All work equipment do not operate
- All work equipment operates slowly or lacks power
- Blade lift speed or power is low
- Blade tilt speed or power is low
- Blade angle speed or power is low
- Time lag of blade lift is large
- Hydraulic drift of lifted blade is large
- Hydraulic drift of tilted blade is large
- Unusual noise is heard from around work equipment pump or control valve
- HSToil temperature (hydraulic oil temperature) rises too high
- Fan speed is abnormal (too high or low, or fan doe not rotate)
- Unusual noise is heard from around fan
Troubleshooting of engine (S-mode)20 topics
- Information described in troubleshooting table (S mode)
- Engine does not crank when starting switch is turned to START position
- Engine cranks but no exhaust smoke comes out
- Engine startability is poor
- Engine does not pick up smoothly
- Engine stops during operation
- Engine runs rough or is unstable
- Engine lacks power
- Exhaust smoke is black
- Engine oil consumption is excessive
- Oil becomes contaminated quickly
- Fuel consumption is excessive
- Oil is in coolant (or coolant spurts or coolant level goes down)
- Oil pressure drops
- Fuel mixes into engine oil
- Water mixes into engine oil (milky)
- Coolant temperature rises too high (overheating)
- Unusual noise is heard
- Vibration is excessive
- Air cannot be bled from fuel circuit
Disassembly and assembly
Related information on disassembly and assembly1 topic
- How to read this manual
Coating materials list
Special tools list
Sketches of special tools
Removal and installation of supply pump assembly
Removal and installation of fuel injector assembly
Removal and installation of cylinder head assembly
Removal and installation of radiator assembly
Removal and installation of aftercooler assembly
Removal and installation of hydraulic oil cooler assembly
Removal and installation of cooling fan drive assembly
Removal and installation of cooling fan motor assembly
Removal and installation of engine and HST pump assembly
Disassembly and assembly of damper assembly
Removal and installation of engine front oil seal
Removal and installation of engine rear oil seal
Removal and installation of engine hood assembly
Removal and installation of fuel tank assembly
Removal and installation of KCCV assembly
Removal and installation of VFTassembly
Removal and installation of EGR (Exhaust Gas Recirculation) cooler assembly
Removal and installation of EGR (Exhaust Gas Recirculation) valve assembly
Removal and installation of starting motor assembly
Removal and installation of belt for alternator and air conditioner compressor
Removal and installation of air cleaner assembly
Removal and installation of HST motor and final drive assembly
Disassembly and assembly of final drive
Removal and installation of idler and recoil spring assembly
Disassembly and assembly of idler
Disassembly and assembly of recoil spring
Disassembly and assembly of track roller assembly
Disassembly and assembly of carrier roller assembly
Separation and connection of track shoe assembly (Standard type track shoe)
Separation and connection of track shoe assembly (PLUS type track shoe)
Removal and installation of hydraulic tank assembly
Removal and installation of control valve assembly
Removal and installation of HST pump assembly
Disassembly and assembly of hydraulic cylinder assembly
Removal and installation of work equipment assembly
Removal and installation of blade assembly
Removal and installation of U-frame assembly
Removal and installation of ROPS cab assembly
Removal and installation of wiper arm
Removal and installation of operator's cab glass (adhesion glass)
Removal and installation of operator's seat
Removal and installation of seat belt
Removal and installation of foot heater assembly
Disassembly and assembly of foot heater assembly
Removal and installation of air conditioner unit assembly
Removal and installation of air conditioner compressor assembly
Removal and installation of machine monitor assembly
Removal and installation of engine controller assembly
Removal and installation of HSTcontroller assembly7 topics
- Removal and installation of mass air flow and temperature sensor
- Removal and installation of KOMTRAX terminal
- Removal and installation of ICTsensor controller assembly
- Removal and installation of iB monitor
- Removal and installation of GNSS receiver
- Removal and installation of iB GNSS antenna
- Removal and installation of IMU sensor
Maintenance standard24 topics
- Engine mount
- Cooling fan motor
- Oil cooler bypass and HSTcharge safety valve
- Damper
- HST pump
- HST motor
- Charge pump
- Solenoid valve
- Final drive
- Sprocket
- Full-scale drawing of sprocket tooth profile
- Track frame and idler cushion
- Idler
- Track roller
- Carrier roller
- Track shoe
- Hydraulic tank
- Cutting edge and end bit
- Lift cylinder
- Lift cylinder with stroke and reset sensor
- Tilt cylinder with stroke sensor
- Angle cylinder
- Angle cylinder with stroke and reset sensor
- Ripper cylinder
Appendix
Air conditioner components8 topics
- Precautions for refrigerant
- Air conditioner component
- Configuration and function of refrigeration cycle
- Outline of refrigeration cycle
- Air conditioner unit
- Dual pressure switch
- Pressure switch
- Compressor
Condenser
Receiver drier
Procedure for testing and troubleshooting
Electrical circuit diagram
System diagram
Parts and connectors layout
Testing relays
Troubleshooting chart 1
Troubleshooting chart 2
Information described in troubleshooting table
Troubleshooting for condenser fan
Troubleshooting for compressor and refrigerant system (Air is not cooled)1 topic
- abnormal)
Troubleshooting for temperature control
Troubleshooting with gauge pressure
Connection of service tool1 topic
- circuit
Handling of compressor oil
Diagrams and drawings
Hydraulic circuit diagram
Symbols in hydraulic circuit diagram
Electric circuit diagram
Symbols in electric circuit diagram
tools and parts in their correct places. Always
only in the areas provided for smoking. Never
• When performing any work, always wear the
Inside this manual
Real pages from this service manual (1,700 pages). Open the sample pages (PDF, 798 KB)
- Specifications, page 97: 01 Specification
- Troubleshooting, page 799: Failure code [CA692] Intake Air Temp Sens Low Error
- Diagram, page 1,137: Circuit diagram related to right reverse HST pump EPC solenoid
- Foldout diagram, page 1,681: Electrical circuit diagram (3/10)
Other manuals for this machine
Save 10% on 2 manuals, 15% on 3 or more. Other manuals for the D37EXi-23, D37PXi-23, D39EXi-23 are listed below. Editions cover different serial number ranges: check the serial coverage and tick only the ones that match your machine.
This manual: Service Manual SEN06486-00$169.69
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This is a service manual
Here's how it compares to the other manual types.
This manual
Service manual
Factory repair procedures and technical information such as specifications, troubleshooting, and wiring and hydraulic diagrams, for the models and systems the manual covers. See What's inside for its topics.
Operator's manual
Safe operation, controls, maintenance schedules, lubrication points, inspections, and basic checks. Repair procedures are in the service manual.
Parts manual
Illustrated diagrams with factory part numbers for identifying components and ordering parts. Repair procedures are in the service manual.
Engine service manuals are sometimes sold separately, since certain machine models were offered with more than one engine option.
What it's used for
Factory manual for in-house farm and construction shop use. Straightforward, complete, and easy to follow. It contains the OEM information dealership service departments and parts counters use to diagnose problems, identify components, and perform maintenance or repairs correctly.
Service shops and owner/operators who repair their own equipment
Identifying correct parts and seeing how assemblies come apart and go back together
Keeping equipment running with less downtime
Factory manual, 1,700 pages
Quantity one is the manual described above.
Fast free USA shipping
Ships in 1 business day.
60-day returns
Free if the mistake is ours. A manual ordered in error must come back unopened in its shrink-wrap; you pay return shipping and a 20% restocking fee applies. Return policy
Binder not included
Manuals over about 300 pages may need a standard 3-ring binder, which you can buy locally to keep the pages organized for shop use.
Questions about model, serial number, engine coverage or contents? Contact us before purchasing and we'll help confirm it's the right manual. Please verify the manual type, machine model, serial number range and engine coverage before purchasing: manuals ordered in error carry a 20% restocking fee (return policy).