Komatsu HB365LC-3, Operation & Maintenance Manual

Page: 344 / 506

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, deterioration of bat-
tery Check and repair loose terminal or
wire breakage, replace battery. (*)
Loosening and damage of alternator
belt Check alternator belt tension and re-
place. (*)
Lamp flickers while engine is run-
ning.
Defective wiring, deterioration of bat-
tery Check and repair loose terminal or
wire breakage, replace battery. (*)
Loosening and damage of alternator
belt Check alternator belt tension and re-
place. (*)
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. (*)
Defective starting motor Replace. (*)
Insufficient battery charge Charge battery.
Battery disconnect switch at OFF po-
sition Turn ON.
Engine shutdown secondary switch
at “STOP ENGINE” position Set it to “NORMAL” position.
Apply the cover.
Pinion of starting motor repeats en-
gaging and disengaging (rattles). Insufficient battery charge Charge battery.
Defective safety relay Replace. (*)
Starting motor turns engine sluggish-
ly. Insufficient battery charge Charge battery.
Defective starting motor Replace. (*)
Starting motor disengages before
engine starts. Defective wiring, defective ring gear
and pinion Check, repair. (*)
Insufficient battery charge Charge battery.
Preheating pilot lamp does not light
up. 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 oil pressure caution switch Replace. (*)
When startability at low temperature
is poor, if you touch the outside of
the electric heater by hand after pre-
heating, it is not felt warm. Defective wiring Check, repair. (*)
Wire breakage in electrical intake air
heater Replace. (*)
Defective operation of heater relay Replace. (*)
Blown fuse of the heater Replace. (*)
TROUBLES AND ACTIONS OPERATION
3-272