Komatsu PC45MR-30403, Operation And Maintenance Manual

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OTHER TROUBLE
PHENOMENA AND ACTIONS FOR ELECTRICAL SYSTEM
• 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
Lamp does not glow brightly even
when the engine runs at high speeds. Defective wiring Check and repair loose terminals,
open circuit. (*)
Loose fan belt Adjust fan belt tension. See EVERY
500 HOURS MAINTENANCE.
Blown fuse Replace
Lamp flickers while engine is running. Defective wiring Check and repair loose terminals,
open circuit. (*)
Loose fan belt Adjust fan belt tension. See EVERY
500 HOURS MAINTENANCE.
Blown fuse Replace
Charge level caution lamp does not
go out even when engine is running. Defective alternator Replace. (*)
Defective wiring Check, repair. (*)
Unusual noise is generated from al-
ternator Defective alternator Replace. (*)
Starting motor does not rotate even
when starting switch is turned to
START position. Defective wiring Check, repair. (*)
Insufficient battery charge Charge battery.
Blown fuse Replace
Battery disconnect switch (if equip-
ped) is at OFF position Turn it to ON position.
Engine shutdown secondary switch is
at “ENGINE STOP” position Set it to “NORMAL” position and
close the cover.
Lock lever is in FREE position Set the lock lever to LOCK position.
Pinion of starting motor repeats en-
gaging and disengaging (rattles). Insufficient battery charge Charge battery.
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.
Preheating pilot lamp does not light
up. Defective wiring Check, repair. (*)
Oil pressure caution lamp does not
light up when engine is stopped
(starting switch is at ON position). Defective caution lamp Replace. (*)
Defective oil pressure switch Replace. (*)
TROUBLES AND ACTIONS OPERATION
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