Other Trouble - Komatsu HB365LC-3 Operation & Maintenance Manual

TROUBLES AND ACTIONS

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
Lamp does not glow brightly even
when the engine runs at high
speeds.
Lamp flickers while engine is run-
ning.
Charge level caution lamp does not
go out even when engine is running.
Unusual noise is generated from al-
ternator.
Starting motor does not rotate even
when starting switch is turned to
START position.
Pinion of starting motor repeats en-
gaging and disengaging (rattles).
Starting motor turns engine sluggish-
ly.
Starting motor disengages before
engine starts.
Preheating pilot lamp does not light
up.
Oil pressure caution lamp does not
light up when engine is stopped
(starting switch is at ON position).
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.
3-272
Main causes
Defective wiring, deterioration of bat-
tery
Loosening and damage of alternator
belt
Defective wiring, deterioration of bat-
tery
Loosening and damage of alternator
belt
Defective alternator
Defective wiring
Defective alternator
Defective wiring
Defective starting motor
Insufficient battery charge
Battery disconnect switch at OFF po-
sition
Engine shutdown secondary switch
at "STOP ENGINE" position
Insufficient battery charge
Defective safety relay
Insufficient battery charge
Defective starting motor
Defective wiring, defective ring gear
and pinion
Insufficient battery charge
Defective wiring
Defective heater relay
Defective monitor
Defective monitor
Defective oil pressure caution switch
Defective wiring
Wire breakage in electrical intake air
heater
Defective operation of heater relay
Blown fuse of the heater
Remedy
Check and repair loose terminal or
wire breakage, replace battery. (*)
Check alternator belt tension and re-
place. (*)
Check and repair loose terminal or
wire breakage, replace battery. (*)
Check alternator belt tension and re-
place. (*)
Replace. (*)
Check, repair. (*)
Replace. (*)
Check, repair. (*)
Replace. (*)
Charge battery.
Turn ON.
Set it to "NORMAL" position.
Apply the cover.
Charge battery.
Replace. (*)
Charge battery.
Replace. (*)
Check, repair. (*)
Charge battery.
Check, repair. (*)
Replace. (*)
Replace. (*)
Replace. (*)
Replace. (*)
Check, repair. (*)
Replace. (*)
Replace. (*)
Replace. (*)
OPERATION