Komatsu D85EX-18 Operation & Maintenance Manual page 285

OPERATION
Problem
Starting motor turns engine sluggish-
ly.
Starting motor disengages before en-
gine starts.
Automatic preheating does not work.
Preheating pilot lamp does not light
up.
(when coolant temperature is -5 °C or
below)
Oil pressure caution lamp does not
light up when engine is stopped.
(starting switch is at ON position)
Charge level caution lamp does not
light up when engine is stopped.
(starting switch is at ON position)
Outside of electrical intake air heater
is not warm when touched with hand.
Defective operation of air conditioner Fuse blow
Engine does not start.
(L04 lights up on monitor.)
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
When brake pedal is depressed, ma-
chine does not stop.
Track shoe comes off.
Abnormal wear of sprocket
Blade and ripper rise slowly or do not
rise.
Main causes
Insufficient battery charge
Defective starting motor
Defective wiring
Insufficient battery charge
Defective wiring
Defective heater relay
Defective engine controller
Defective wiring
Defective heater relay
Defective monitor
Defective monitor
Defective caution lamp switch
Defective monitor
Defective wiring
Defective wiring
Wire breakage in electrical intake air
heater
Defective operation of heater relay
Insufficient battery charge
Defective air conditioner switch
Defective blower switch
Defective compressor
Damaged data in the controller
Other system troubles
Main causes
Brakes out of adjustment, defective
oil pressure
Track tension is too low.
Track shoe is too low, or too high.
Insufficient hydraulic oil level
Work equipment lock lever is in
LOCK.
TROUBLES AND ACTIONS
Remedy
Charge battery.
Replace. (*)
Check, repair. (*)
Charge battery.
Check, repair. (*)
Replace. (*)
Check, replace (*)
Check, repair. (*)
Replace. (*)
Replace. (*)
Replace. (*)
Replace. (*)
Replace. (*)
Check, repair. (*)
Check, repair. (*)
Replace. (*)
Check, repair heater relay. (*)
Check, repair. (*)
Charge battery.
Replace air conditioner switch. (*)
Replace blower switch. (*)
Replace. (*)
Check, repair. (*)
Check, repair. (*)
Remedy
Adjust, check, repair. (*)
Adjust track tension, see WHEN RE-
QUIRED.
Adjust track tension, see WHEN RE-
QUIRED.
Set oil to specified level. See
CHECKS BEFORE STARTING.
Set to FREE.
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