Komatsu D37EX-24 Operation & Maintenance Manual page 273

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