Komatsu D51EX-24, Operation & Maintenance Manual

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Problem Main causes Remedy
Charge level caution lamp does not
light up when engine is stopped.
(Starting switch is at ON position.) Defective monitor Replace. (*)
Defective wiring Check, repair. (*)
Outside of electrical heater is not
warm when touched by hand. Defective wiring Check, repair. (*)
Wire breakage in electrical intake air
heater Replace. (*)
Malfunction of heater relay Check, repair heater relay. (*)
Malfunction of air conditioner Blown fuse Check, repair. (*)
Insufficient battery charge Charge the battery.
Defective air conditioner switch Replace air conditioner switch. (*)
Defective blower switch Replace blower switch. (*)
Defective compressor Replace. (*)
Engine does not start.
(L04 lights up on monitor.) Damaged data in the controller Check, repair. (*)
Other system troubles Check, repair. (*)
PHENOMENA AND ACTIONS FOR CHASSIS
• Contact your Komatsu distributor for the remedies indicated with (*) in the remedy column.
• Ask your Komatsu distributor for repairs for problems or causes which are not listed below.
Problem Main causes Remedy
Machine does not stop even if the de-
celerator/brake pedal is depressed. Incorrect adjustment of decelerator/
brake pedal sensor and switch
Adjust, check, repair. (*)
Track shoe comes off. Track tension is too loose. Adjust the track tension. See WHEN
REQUIRED.
Abnormal wear of sprocket Track shoe is too low, or too high. Adjust track tension. See WHEN RE-
QUIRED.
Blade rises slowly or do not rise. Lack of hydraulic oil Add oil to the specified level. See
CHECKS BEFORE STARTING.
Work equipment lock lever is in
LOCK position. Set to FREE.
Charge pump is worn or scuffed. Check, replace. (*)
Defective work equipment EPC valve Check, replace. (*)
When machine is steered, it does not
turn. Parking lever is in LOCK position. Set to FREE.
Defective lever wiring Check, repair. (*)
Abnormal noise is heard from idler. Lack of idler oil Adjust track tension. See WHEN RE-
QUIRED.
Add oil to the specified level. (*)
Lack of traction force (Travel speed is
low.) Lack of engine power See “PHENOMENA AND ACTIONS
FOR ENGINE RELATED PARTS”
Acceleration of travel speed is low. Hydraulic oil temperature is low. Warm-up.
TROUBLES AND ACTIONS OPERATION
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