.
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 cause Remedy
Lamp does not glow brightly even
when the engine runs at high speed
Defective wiring
(
Check, repair loose terminals,
disconnections
Check fuses and diodes in fuse
box)
Adjust fan belt tension
For details, see EVERY 250
HOURS SERVICE
Lamp flickers while engine is
running
Fefective adjustment of fan belt
tension
Charge lamp doe not go out even
when engine is running
Defective alternator
Defective wiring
(
Replace)
(
Check, repair
Check fuse, diode in fuse box)
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 monitor lamp does not
light up
(When the temperature of the
engine cooling water exceed 20
°
C
(68
°
F), this condition is normal)
Defective wiring
Defective timer
Defective monitor
Disconnection in glow plug
(
Check, repair)
(
Replace)
(
Replace)
(
Replace)
Air conditioner operation is
defective
Blown fuse
Insufficient battery charge
Defective air conditioner switch
Defective blower switch
Defective compressor
(
Check, repair)
Charge
(
Replace air conditioner switch)
(
Replace blower switch)
(
Replace)
3 - 148
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