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OPERATION
TROUBLES AND ACTIONS
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
Defective wiring, deterioration of
battery
Loose fan belt
(
Check, repair loose terminals,
disconnections, replace battery)
(
Replace fan belt, Check tension)
Lamp flickers while engine is
running
Charge level monitor does not go
out even when engine is running
Defective alternator
Defective wiring
(
Replace)
(
Check, repair)
Abnormal noise is generated from
alternator
Defective alternator ( Replace)
Starting motor does not turn when
starting switch is turned to ON
Defective wiring
Defective starting motor
Insufficient battery charge
(
Check, repair)
(
Replace)
Charge
Pinion of starting motor keeps
going and out
Insufficient battery charge
Defective safety relay
Charge
(
Replace)
Starting motor turns engine
sluggishly
Insufficient battery charge
Defective starting motor
Charge
(
Replace)
Starting motor disengages before
engine starts
Defective wiring, defective ring
gear pinion
Insufficient battery charge
(
Check, repair)
Charge
Engine pre-heating monitor does
not light
Defective wiring
Defective heater relay
Defective monitor
(
Check, repair)
(
Replace)
(
Replace)
Oil pressure monitor does not light
up when engine is stopped
(starting switch at ON position)
Defective monitor
Defective caution lamp switch
(
Replace)
(
Replace)
Outside of electrical heater is not
warm when touched by hand
Defective wiring
Disconnection in electric heater
Defective operation of heater
(
Check, repair)
(
Replace)
(
Replace)
3 - 153
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