Komatsu WA100M-7, Operation And Maintenance Manual

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Troubleshooting 4.6 Other troubles
WA80M-7, WA100M-7 – VENAM03001
4-11
4.6 Other troubles
4.6.1 Electrical system
If errors or causes of errors occur that are not listed here, have
the repair performed by your Komatsu distributor.
*) These tasks should be performed by the distributor.
ELECTRIC SYSTEM
Fault Cause Remedy
Battery charge circuit caution lamp:
The battery charge circuit caution lamp
does not light up after the engine has
been switched off and the starting
switch has been set to the operating
position, 'ON'.
Electrical connection is not
functioning Check loose terminals, disconnections
and cables *)
Battery charge circuit caution lamp:
The battery charge circuit caution lamp
does not go out when the engine is
running
Electrical connection is not
functioning Check loose terminals, disconnections
and cables *)
Alternator is not functioning
Check the function of the alternator;
replace defective alternator *)
Drive belts of the alternator
are not tensioned properly.
Tension drive belt
Alternator creates abnormal noises Defective alternator Renew alternator *)
Starter motor does not turn
Electrical connection is not
functioning Check loose terminals, disconnections
and cables *)
Battery main switch is in OFF
position.
Turn the switch to the ON position.
Insufficient battery charge
Charge battery
Check the function of the battery;
replace the battery if it is defective *)
Pinion of starter motor repeatedly shifts
in and out
Insufficient battery charge Charge battery
Defective starter motor Replace starter motor *)
Starter motor turns engine sluggishly
Insufficient battery charge Charge battery
Defective starter motor Replace starter motor *)
Starter motor disengages before
engine starts
Insufficient battery charge Charge battery
Defective starter motor Replace starter motor *)