Komatsu HB215LC-3, Operation & Maintenance Manual, Page: 339 / 492

Problem Main causes Remedy
Lamp does not glow brightly even
when the engine runs at high speed.
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 is at OFF
position Turn it to ON position.
Engine shutdown secondary switch
at “engine stop” position Set it to “normal” position.
Put cover on it.
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. (*)
Engine oil pressure switch error 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. (*)
Malfunction of heater relay Replace. (*)
Blown fuse of heater Replace. (*)
Engine does not start.
(“L04” lights up on monitor.) Damaged data in the controller Check, repair. (*)
Other system troubles Check, repair. (*)
OPERATION TROUBLES AND ACTIONS
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