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Komatsu WA400-5L Wheel Loader Service Manual

1,224 pages · Publication CEBM010002

$129.87
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Models
WA400-5L
Serial coverage
A40001 and up
Manual type
Service Manual
Pages
1,224
Publication
CEBM010002
Condition
Brand new
Komatsu WA400-5L Wheel Loader Service Manual, publication CEBM010002

What's inside

From the manual's own table of contents: 4 sections, 358 entries. See sample pages (PDF, 686 KB)

FOREWORD5 topics
  • GENERAL
  • STRUCTURE AND FUNCTION
  • TESTING, ADJUSTING AND TROUBLESHOOTING
  • DISASSEMBLY AND ASSEMBLY
  • OTHER
TESTING AND ADJUSTING6 topics
  • LOAD METER
  • BLEEDING AIR
  • RELEASING REMAINING PRESSURE
  • IN HYDRAULIC CIRCUIT
  • E.C.S.S. DAMPER CIRCUIT
  • PM-CLINIC INSPECTION TABLE
TROUBLESHOOTING310 topics
  • NEUTRAL SAFETY RELAY SYSTEM OPEN
  • ERROR CODE [D191KB]
  • NEUTRAL SAFETY RELAY SYSTEM SHORTED
  • ERROR CODE [D192KA]
  • TRAVEL DAMPER RELAY SYSTEM OPEN
  • ERROR CODE [D192KB]
  • TRAVEL DAMPER RELAY SYSTEM SHORTED
  • ERROR CODE [D198KB]
  • LOW TEMPERATURE BYPASS RELAY SYSTEM SHORTED
  • ERROR CODE [D198KY]
  • LOW TEMPERATURE BYPASS RELAY SYSTEM OPEN
  • ERROR CODE [DAQ0KK]
  • CONTROLLER POWER SUPPLY TO MONITOR LOW
  • ERROR CODE [DAQ2KK]
  • DEFECTIVE SOLENOID POWER SUPPLY
  • ERROR CODE [DAQ9KQ]
  • MODEL SELECTION SIGNAL MISMATCH
  • ERROR CODE [DDK3KA]
  • NO JOYSTICK FORWARD/REVERSE SIGNAL
  • ERROR CODE [DDK4KB]
  • MULTIPLE JOYSTICK FORWARD OR/REVERSE SIGNALS
  • ERROR CODE [DDK4KA]
  • NO INPUT FROM JOYSTICK SWITCH
  • ERROR CODE [DDK5LD]
  • SHORT CIRCUIT IN POWER SOURCE FOR JOYSTICK SHIFT UP/SHIFT DOWN SWITCH
  • ERROR CODE [DDK6KA]
  • FORWARD-REVERSE SIGNAL FAULT
  • ERROR CODE [DDK6KB]
  • MULTIPLE FORWARD-REVERSE SIGNAL INPUTS
  • ERROR CODE [DDS5KA]
  • STEERING PRESSURE SWITCH OPEN
  • ERROR CODE [DDS5KB]
  • STEERING PRESSURE SWITCH SHORTED
  • ERROR CODE [DDT0L4]
  • MANUAL/AUTO-SHIFT SELECTOR SELECTION FAILURE
  • ERROR CODE [DDT4LD]
  • GROUND FAULT IN TRANSMISSION CUT-OFF SWITCH
  • ERROR CODE [DDW9LD]
  • SHORT IN KICKDOWN SWITCH SYSTEM
  • ERROR CODE [DDWLLD]
  • GROUND FAULT IN HOLD SWITCH SYSTEM
  • ERROR CODE [DF10KA]
  • NO INPUT SIGNAL IN GEAR SHIFT LEVER
  • ERROR CODE [DF10KB]
  • MULTIPLE GEAR SHIFT LEVER SIGNALS
  • ERROR CODE [DGF1KX]
  • TRANSMISSION OIL TEMPERATURE SENSOR SYSTEM FAILURE
  • ERROR CODE [DGR2KA]
  • REAR BRAKE OIL TEMPERATURE SENSOR SYSTEM OPEN
  • ERROR CODE [DGR2KB]
  • GROUND FAULT IN REAR BRAKE OIL TEMPERATURE SENSOR SYSTEM
  • ERROR CODE [DHT1KX]
  • TRANSMISSION CUT-OFF (LEFT BRAKE PRESSURE SENSOR) SIGNAL OPEN
  • ERROR CODE [DLE2KA]
  • ENGINE SPEED SENSOR OPEN
  • ERROR CODE [DLE2LC]
  • ENGINE SPEED SENSOR SHORTED
  • ERROR CODE [DLT3KA]
  • SPEED SENSOR SYSTEM OPEN
  • ERROR CODE [DT20KB]
  • GROUND FAULT IN INDICATOR LAMP SYSTEM (TRANSMISSION CUT-OFF SWITCH)
  • ERROR CODE [DW7BKA]
  • FAN PUMP REVERSE SOLENOID SYSTEM OPEN
  • ERROR CODE [DW7BKB]
  • FAN REVERSE SOLENOID SYSTEM SHORTED
  • ERROR CODE [DW7CKA]
  • SWITCH PUMP CUT-OFF RELAY OPEN
  • ERROR CODE [DW7CKB]
  • SWITCH PUMP CUT-OFF RELAY GROUND FAULT
  • ERROR CODE [DX16KA]
  • FAN PUMP EPC SOLENOID SYSTEM OPEN
  • ERROR CODE [DX16KB]
  • FAN PUMP EPC SOLENOID SYSTEM GROUND FAULT
  • ERROR CODE [DXH1KA]
  • LOCK-UP CLUTCH_ECMV SOLENOID SYSTEM OPEN
  • ERROR CODE [DXH1KB]
  • LOCK-UP CLUTCH ECMV SOLENOID SYSTEM SHORTED
  • ERROR CODE [DXH4KA]
  • 1ST_ECMV SOLENOID SYSTEM OPEN
  • ERROR CODE [DXH4KB]
  • 1ST_ECMV SOLENOID SYSTEM SHORTED
  • ERROR CODE [DXH5KA]
  • 2ND_ECMV SOLENOID SYSTEM OPEN
  • ERROR CODE [DXH5KB]
  • 2ND_ECMV SOLENOID SYSTEM SHORTED
  • ERROR CODE [DXH6KA]
  • 3RD_ECMV SOLENOID SYSTEM OPEN
  • ERROR CODE [DXH6KB]
  • 3RD_ECMV SOLENOID SYSTEM SHORTED
  • ERROR CODE [DXH7KA]
  • R_ECMV SOLENOID SYSTEM OPEN
  • ERROR CODE [DXH7KB]
  • R_ECMV SOLENOID SYSTEM GROUND FAULT
  • ERROR CODE [DXH8KA]
  • F_ECMV SOLENOID SYSTEM OPEN
  • ERROR CODE [DXH8KB]
  • F_ECMV SOLENOID SYSTEM GROUND FAULT
  • ERROR CODE [DXHHKA]
  • 4TH_ECMV SOLENOID SYSTEM OPEN
  • ERROR CODE [DXHHKB]
  • 4TH_ECMV SOLENOID SYSTEM SHORTED
  • ERROR CODE [DY30MA]
  • MOTOR-DRIVEN EMERGENCY STEERING PUMP FAILURE
  • ERROR CODE [DY30MC]
  • ACTION CODE [TM-1]
  • OPEN OR SHORT IN KICKDOWN SWITCH SYSTEM
  • ACTION CODE [TM-2]
  • HOLD SWITCH SYSTEM OPEN OR SHORT
  • ACTION CODE [TM-3]
  • TORQUE CONVERTER LOCK-UP SWITCH SYSTEM FAILURE
  • ACTION CODE [TM-4]
  • NEUTRAL SIGNAL SYSTEM FAILURE
  • ACTION CODE [TM-5]
  • EMERGENCY STEERING SWITCH SIGNAL SYSTEM FAILURE
  • ACTION CODE [TM-6]
  • TRANSMISSION CUT-OFF SWITCH SYSTEM OPEN OR SHORTED
  • ACTION CODE [TM-7]
  • TRANSMISSION CUT-OFF SETTING SWITCH SYSTEM OPEN OR SHORTED
  • ACTION CODE [TM-8]
  • TRANSMISSION CUT-OFF (LEFT BRAKE SENSOR) SIGNAL SHORTED
  • ACTION CODE [TM-9]
  • JOYSTICK SHIFT UP/SHIFT DOWN SWITCH SYSTEM FAILURE
  • ACTION CODE [TM-10A]
  • JOYSTICK ON/OFF CHANGE OVER SWITCH SYSTEM FAILURE
  • ACTION CODE [TM-10B]
  • IGNITION SWITCH "C" (IGN C) SIGNAL SYSTEM FAILURE
  • ACTION CODE [TM-11]
  • FNR SWITCH SYSTEM FAILURE
  • ACTION CODE [TM-12]
  • ENGINE POWER MODE SWITCH OPEN OR SHORTED
  • ACTION CODE [TM-13]
  • OPEN OR SHORT IN TRAVEL DAMPER ON/OFF SWITCH
  • ACTION CODE [TM-14]
  • OPEN OR SHORT IN HYDRAULIC FAN REVERSE SIGNAL SYSTEM
  • ACTION CODE [TM-15]
  • SHORT IN MOTOR DRIVEN EMERGENCY STEERING RELAY SYSTEM
  • ACTION CODE [TM-16]
  • SHORT IN TRAVEL DAMPER RELAY SYSTEM
  • ACTION CODE [TM-17]
  • SWITCH PUMP CUT-OFF RELAY SYSTEM SHORTED
  • ACTION CODE [TM-18]
  • BACK LAMP RELAY SYSTEM SHORTED
  • ACTION CODE [TM-19]
  • NEUTRAL SYSTEM SHORTED
  • ACTION CODE [TM-20]
  • F_ECMV SOLENOID SYSTEM SHORTED
  • ACTION CODE [TM-21]
  • R_ECMV SOLENOID SYSTEM SHORTED
  • ACTION CODE [TM-22]
  • ACTION CODE [TM-23]
  • ACTION CODE [TM-24]
  • ACTION CODE [TM-25]
  • ACTION CODE [TM-26]
  • LOCK-UP ECMV SOLENOID SYSTEM SHORTED
  • ACTION CODE [TM-27]
  • FAN PUMP EPC SOLENOID SYSTEM SHORTED
  • ACTION CODE [TM-28]
  • ACTION CODE [TM-29]
  • SPEED SENSOR SYSTEM FAILURE
  • DEFECTIVE 3RD VALVE POTENTIOMETER LEVER
  • ERROR CODE [DK5FKA]
  • DEFECTIVE JOYSTICK STEERING EPC SYSTEM (MAIN CIRCUIT OPEN OR SHORTED)
  • ERROR CODE [DK5FKY]
  • SHORTED)
  • ERROR CODE [DK5FKM]
  • JOYSTICK STEERING EPC LEVER NEUTRAL SYSTEM CAUTION
  • ERROR CODE [DK5FL8]
  • DEFECTIVE JOYSTICK STEERING EPC LEVER POTENTIOMETER INPUT SIGNAL
  • ERROR CODE [DK5GKA]
  • SUB CIRCUIT)
  • ERROR CODE [DK5GKY]
  • ERROR CODE [DKAOKA]
  • DEFECTIVE LIFT ARM ANGLE SENSOR SYSTEM (OPEN OR SHORT)
  • ERROR CODE [DKAOKY]
  • DEFECTIVE LIFT ARM ANGLE SENSOR (SYSTEM SHORTED)
  • DEFECTIVE ENGINE SPEED SENSOR SYSTEM
  • ERROR CODE [DLT3LC]
  • DEFECTIVE TRANSMISSION OUTPUT AXLE SPEED SENSOR SYSTEM (OPEN)
  • ERROR CODE [DUM1KB]
  • REMOTE POSITIONER GROUND FAULT
  • ERROR CODE [DUM2KB]
  • ERROR CODE [DW4PKA]
  • RAISE EPC SOLENOID FAULT
  • ERROR CODE [DW4PKB]
  • ERROR CODE [DW4QKA]
  • LOWER EPC SOLENOID FAULT
  • ERROR CODE [DW4QKB]
  • ERROR CODE [DW4RKA]
  • TILT EPC SOLENOID FAULT
  • ERROR CODE [DW4RKB]
  • ERROR CODE [DW4SKA]
  • DUMP EPC SOLENOID FAULT
  • ERROR CODE [DW4SKB]
  • ERROR CODE [DWM1KA]
  • LOCK EPC SOLENOID FAULT
  • ERROR CODE [DWM1KB]
  • ERROR CODE [DWN6KA]
  • DEFECTIVE RAISE DETENT SYSTEM
  • ERROR CODE [DWN6KB]
  • ERROR CODE [DWN7KA]
  • DEFECTIVE FLOAT DETENT SYSTEM
  • ERROR CODE [DWN7KB]
  • ERROR CODE [DWN8KA]
  • DEFECTIVE TILT DETENT SYSTEM
  • ERROR CODE [DWN8KB]
  • ERROR CODE [DXHJKA]
  • 3RD VALVE EPC SOLENOID FAULT
  • ERROR CODE [DXHJKB]
  • ERROR CODE [DXHKKA]
  • ERROR CODE [DXHKKB]
  • ERROR CODE: [DXHLKA]
  • OPEN IN JOYSTICK STEERING RIGHT-HAND EPC SOLENOID SYSTEM
  • ERROR CODE: [DXHLKB]
  • JOYSTICK STEERING RIGHT-HAND EPC SOLENOID SYSTEM GROUND FAULT
  • ERROR CODE: [DXHMKA]
  • JOYSTICK STEERING LEFT-HAND EPC SOLENOID SYSTEM OPEN
  • ERROR CODE: [DXHMKB]
  • JOYSTICK STEERING LEFT-HAND EPC SOLENOID SYSTEM GROUND FAULT
  • LIFT ARM LOCK SWITCH FAILURE
  • DEFECTIVE REMOTE POSITIONER RAISE SETTING
  • DEFECTIVE REMOTE POSITIONER LOWER SETTING
  • DEFECTIVE BUCKET PROXIMITY SWITCH
  • DEFECTIVE BUCKET FULL STROKE SWITCH
  • DEFECTIVE SEMI-AUTO DIGGING SYSTEM
  • DEFECTIVE JOYSTICK ON/OFF SWITCH SYSTEM
  • DEFECTIVE JOYSTICK STEERING HI/LO SYSTEM
  • DEFECTIVE JOYSTICK SOLENOID RELAY SYSTEM
  • SHORT IN JOYSTICK STEERING RIGHT EPC SOLENOID SYSTEM
  • SHORT IN JOYSTICK STEERING LEFT EPC SOLENOID SYSTEM
  • DEFECTIVE KICK-OUT FUNCTION BUCKET FLOAT
  • DEFECTIVE KICK-OUT FUNCTION LIFT ARM
  • DEFECTIVE BUCKET LEVER FUNCTION
  • DEFECTIVE FLOAT FUNCTION
  • CONTROLLER
  • ERROR CODE [DBQSKR]
  • ERROR CODE [DB9SKR]
  • ERROR CODE [DD15LD]
  • MONITOR PANEL MODE SELECTOR SWITCH 1 [n] (PANEL SW1) INPUT ERROR
  • ERROR CODE [DD16LD]
  • MONITOR PANEL MODE SELECTOR SWITCH 1 [‡] (PANEL SW2) INPUT ERROR
  • ERROR CODE [DD17LD]
  • MONITOR PANEL MODE SELECTOR SWITCH 2 [<] (PANEL SW3) INPUT ERROR
  • ERROR CODE [DD18LD]
  • MONITOR PANEL MODE SELECTOR SWITCH 2 [>] (PANEL SW4) INPUT ERROR
  • ERROR CODE [DD1CLD]
  • SUB-TOTAL SWITCH FAILURE
  • ERROR CODE [DDS5L6]
  • DECREASED STEERING OIL PRESSURE
  • ERROR CODE [DDY0LD]
  • CANCEL SWITCH FAILURE
  • ERROR CODE [DGE2KX]
  • ENGINE COOLANT TEMPERATURE (HIGH TEMPERATURE) SENSOR SYSTEM FAILURE
  • ERROR CODE [DGE3L6]
  • SENSOR SYSTEM
  • ERROR CODE [DGH2KX]
  • HYDRAULIC OIL TEMPERATURE SENSOR SYSTEM FAILURE
  • ERROR CODE [DGT1KX]
  • TORQUE CONVERTER OIL TEMPERATURE SENSOR SYSTEM FAILURE
  • ERROR CODE [DHE4L6]
  • ENGINE OIL PRESSURE SENSOR SYSTEM FAILURE
  • ERROR CODE [DHPCKX]
  • BOTTOM PRESSURE SENSOR FAILURE
  • ERROR CODE [DHPDKX]
  • HEAD PRESSURE SENSOR FAILURE
  • ERROR CODE [DKA0KX]
  • LIFT ARM ANGLE SENSOR FAILURE
  • ERROR CODE [DV00KB]
  • SHORTED ALARM BUZZER OUTPUT SYSTEM
  • ERROR CODE [DY30ME]
  • EMERGENCY STEERING REMAINS ACTUATED FOR MORE THAN ONE MINUTE
  • ACTION CODE [MON-1]
  • SWITCH IS TURNED ON
  • ACTION CODE [MON-2]
  • CIRCUIT DIAGNOSTIC PROCEDURES FOR ERROR CODE
  • ACTION CODE [MON-3]
  • BRAKE IS APPLIED (REAR CIRCUIT)
  • ACTION CODE [MON-4]
  • AIR CLEANER CLOGGING INDICATOR LAMP DOES NOT LIGHT
  • ACTION CODE [MON-5]
  • ENGINE OIL PRESSURE CAUTION LAMP DOES NOT LIGHT
  • ACTION CODE [MON-6]
  • ENGINE OIL LEVEL CAUTION LAMP DOES NOT LIGHT
  • ACTION CODE [MON-7]
  • ENGINE COOLANT TEMPERATURE CAUTION LAMP DOES NOT LIGHT
  • ACTION CODE [MON-8]
  • COOLANT LEVEL CAUTION LAMP DOES NOT LIGHT
  • ACTION CODE [MON-9]
  • HYDRAULIC OIL TEMPERATURE CAUTION LAMP DOES NOT LIGHT
  • ACTION CODE [MON-10]
  • TORQUE CONVERTER OIL TEMPERATURE CAUTION LAMP DOES NOT LIGHT
  • ACTION CODE [MON-11]
  • STEERING HYDRAULIC CAUTION LAMP DOES NOT LIGHT
  • ACTION CODE [MON-12]
  • INPUT FAULT IN MONITOR PANEL MODE SWITCH 1 (PANEL SW1)
  • ACTION CODE [MON-13]
  • INPUT FAULT IN MONITOR PANEL MODE SWITCH 1 (PANEL SW2)
  • ACTION CODE [MON-14]
  • INPUT FAULT IN MONITOR PANEL MODE SWITCH 2 (PANEL SW3)
  • ACTION CODE [MON-15]
  • INPUT FAULT IN MONITOR PANEL MODE SWITCH 2 (PANEL SW4)
  • ACTION CODE [MON-16]
  • DEFECTIVE SUBTOTAL SWITCH
  • ACTION CODE [MON-17]
  • DEFECTIVE CANCEL SWITCH
  • ACTION CODE [MON-18]
  • DEFECTIVE BOTTOM PRESSURE SENSOR (SHORT FAULT)
  • ACTION CODE [MON-19]
  • DEFECTIVE HEAD SENSOR
  • ACTION CODE [MON-20]
  • ALARM BUZZER DOES NOT SOUND OR STOP
DISASSEMBLY AND ASSEMBLY33 topics
  • TRANSMISSION
  • DISASSEMBLY
  • ASSEMBLY
  • TRANSMISSION CLUTCH PACK
  • FORWARD AND REVERSE CLUTCH PACKS
  • 1ST AND 4TH CLUTCH PACK
  • 2ND AND 3RD CLUTCH PACK
  • PARKING BRAKE
  • TORQUE CONVERTER (STANDARD)
  • TORQUE CONVERTER (LOCK-UP)
  • REAR AXLE
  • REMOVAL
  • INSTALLATION
  • FRONT AXLE
  • AXLE HOUSING
  • DIFFERENTIAL
  • CENTER HINGE PIN
  • CAB AND FLOOR FRAME
  • TRANSMISSION, WORK EQUIPMENT, PPC PUMP
  • STEERING, SWITCHING, AND FAN PUMP
  • STEERING DEMAND VALVE
  • ORBITROL VALVE
  • CONTROL SIDE
  • ECSS VALVE
  • WORK EQUIPMENT VALVE
  • HYDRAULIC CYLINDERS
  • STEERING, LIFT, AND BUCKET
  • HYDRAULIC TANK
  • WORK EQUIPMENT
  • COUNTERWEIGHT
  • AIR CONDITIONER
  • AIR CONDITIONER COMPRESSOR
  • OPERATOR’S SEAT

Inside this manual

Real pages from this service manual (1,224 pages). Open the sample pages (PDF, 685 KB)

Sample pages from the Komatsu WA400-5L Wheel Loader Service Manual: Specifications, Troubleshooting, Diagram, Foldout diagram
  • Specifications, page 393: TESTING AND ADJUSTING
  • Troubleshooting, page 897: ERROR CODE [DGE2KX]
  • Diagram, page 1,185: OTHERS
  • Foldout diagram, page 1,189: OTHERS

Other manuals for this machine

Save 10% on 2 manuals, 15% on 3 or more. Other manuals for the WA400-5L 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 CEBM010002$129.87
Other manuals for the WA400-5L

Operator's manuals

Details

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, 1,224 pages

Quantity one is the manual described above.

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