Komatsu D375A-8, Operation & Maintenance Manual

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Problem Main causes Remedy
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
• Contact your Komatsu distributor for the remedies indicated with (*) in the remedy column.
• In cases of problems or causes which are not listed below, ask your Komatsu distributor for repairs.
Problem Main causes Remedy
Torque converter oil pressure is low. Leakage of oil or entry of air due to
damage or defective tightening of oil
pipe, pipe joint
Check, repair.
Wear, scuffing of gear pump Check, replace. (*)
Lack of oil in transmission case
Add oil to the specified level. See
CHECKS BEFORE STARTING.
Clogged oil filter element strainer in
transmission case Clean. See EVERY 500 HOURS
MAINTENANCE.
OPERATION TROUBLES AND ACTIONS
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