Other Trouble - Komatsu WA380-6 Operation & Maintenance Manual

OPERATION

OTHER TROUBLE

ELECTRICAL SYSTEM
( ): Always contact your Komatsu distributor when dealing with these items.
In cases of problems or causes which are not listed below, contact your Komatsu distributor for repairs.
Problem
Lamp does not glow brightly even
when the engine runs at high
speed
Lamp flickers while engine is
running
Even when the engine is rotating,
the battery charge circuit caution
lamp does not go out
Abnormal noise is generated from
alternator
Starting motor does not turn when
starting switch is turned to ON
Pinion of starting motor keeps
going in and out
Starting motor turns engine
sluggishly
Starting motor disengages before
engine starts
Preheating pilot lamp does not
light up
Even when engine is stopped,
battery charge circuit caution
lamp does not light up (starting
switch at ON position)
Main causes
Defective wiring
Defective adjustment of belt
tension
Defective alternator
Defective wiring
Defective adjustment of alternator
belt tension
Defective alternator
Defective wiring
Insufficient battery charge
Insufficient battery charge
Insufficient battery charge
Defective starting motor
Defective wiring
Insufficient battery charge
Defective wiring
Defective heater relay, heater
controller, temperature sensor
Defective preheating pilot lamp
Defective wiring
Defective monitor
TROUBLESHOOTING
Remedy
( Check, repair loose terminals,
disconnections)
Adjust alternator belt tension For
details, see EVERY 250 HOURS
SERVICE
( Replace)
( Check, repair)
Adjust alternator belt tension For
details, see EVERY 250 HOURS
SERVICE
( Replace)
( Check, repair)
Charge
Charge
Charge
( Replace)
( Check, repair)
Charge
( Check, repair)
( Replace)
( Replace)
( Check, repair)
( Replace)
3 - 175