Komatsu D155AX-8E0, Operation & Maintenance Manual

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Problem Main causes Remedy
Starting motor turns engine sluggish-
ly. Insufficient battery charge Charge battery.
Defective starting motor Replace. (*)
Starting motor disengages before en-
gine starts. Defective wiring Check, repair. (*)
Insufficient battery charge Charge battery.
Automatic preheating does not work. Defective wiring Check, repair. (*)
Defective heater relay Replace. (*)
Defective engine controller Check, replace (*)
Preheating pilot lamp does not light
up.
(when coolant temperature is -5 °C or
below) Defective wiring Check, repair. (*)
Defective heater relay Replace. (*)
Defective monitor Replace. (*)
Oil pressure caution lamp does not
light up when engine is stopped.
(starting switch is at ON position) Defective monitor Replace. (*)
Defective caution lamp switch Replace. (*)
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 intake air heater
is not warm when touched with hand. Defective wiring Check, repair. (*)
Wire breakage in electrical intake air
heater Replace. (*)
Defective operation of heater relay Check, repair heater relay. (*)
Defective operation of air conditioner Fuse blow Check, repair. (*)
Insufficient battery charge Charge 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
• For the remedies indicated with (*) in the remedy column, always contact your Komatsu distributor.
• In cases of problems or causes which are not listed below, ask your Komatsu distributor for repairs.
Problem Main causes Remedy
When brake pedal is depressed, ma-
chine does not stop. Brakes out of adjustment, defective
oil pressure
Adjust, check, repair. (*)
Track shoe comes off. Track tension is too low. Adjust track tension, see WHEN RE-
QUIRED.
Abnormal wear of sprocket Track shoe is too low, or too high. Adjust track tension, see WHEN RE-
QUIRED.
Blade and ripper rise slowly or do not
rise. Insufficient hydraulic oil level Set oil to specified level. See
CHECKS BEFORE STARTING.
Work equipment lock lever is in
LOCK. Set to FREE.
TROUBLES AND ACTIONS OPERATION
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