Komatsu WA380-6 Service Manual

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OPERATION
TROUBLESHOOTING
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 Main causes Remedy
Lamp does not glow brightly even
when the engine runs at high
speed
Lamp flickers while engine is
running
Defective wiring
Defective adjustment of belt
tension
(
Check, repair loose terminals,
disconnections)
Adjust alternator belt tension For
details, see EVERY 250 HOURS
SERVICE
Even when the engine is rotating,
the battery charge circuit caution
lamp does not go out
Defective alternator
Defective wiring
Defective adjustment of alternator
belt tension
(
Replace)
(
Check, repair)
Adjust alternator belt tension For
details, see EVERY 250 HOURS
SERVICE
Abnormal noise is generated from
alternator
Defective alternator ( Replace)
Starting motor does not turn when
starting switch is turned to ON
Defective wiring
Insufficient battery charge
(
Check, repair)
Charge
Pinion of starting motor keeps
going in and out
Insufficient battery charge Charge
Starting motor turns engine
sluggishly
Insufficient battery charge
Defective starting motor
Charge
(
Replace)
Starting motor disengages before
engine starts
Defective wiring
Insufficient battery charge
(
Check, repair)
Charge
Preheating pilot lamp does not
light up
Defective wiring
Defective heater relay, heater
controller, temperature sensor
Defective preheating pilot lamp
(
Check, repair)
(
Replace)
(
Replace)
Even when engine is stopped,
battery charge circuit caution
lamp does not light up (starting
switch at ON position)
Defective wiring
Defective monitor
(
Check, repair)
(
Replace)
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Komatsu WA380-6 Specifications

General

Brand	Komatsu
Model	WA380-6
Category	Compact Loader
Language	English