Other Trouble - Komatsu D155A-6 Operation & Maintenance Manual

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
Lamp does not glow brightly even
when the engine runs at high speed
Lamp flickers while engine is
running
Charge lamp does not go out even
when engine is running
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
Automatic pre-heating is not
actuated
Outside of electrical heater in not
worm when touched by hand
Air conditioner does not work
properly
3 - 182
Main causes
Defective wiring
Defective adjustment of fan belt
tension
Defective alternator
Defective wiring
Defective alternator
Defective wiring
Insufficient battery charge
Safety switch out of adjust
Insufficient battery charge
Insufficient battery charge
Defective starting motor
Defective wiring
Insufficient battery charge
Defective wiring
Defective heater relay
Defective engine controller
Defective wiring
Disconnection in electrical
intake air heater
Defective operation of heater
relay
Blown fuse
Insufficient battery charge
Defective air conditioner switch
Defective blower switch
Defective compressor
Remedy
( Check,repair loose terminals,
disconnections)
Adjust alternator belt tension For
details, see EVERY 250
HOURS SERVICE
( Replace)
( Check, repair)
( Replace)
( Check, repair)
Charge
( Adjust safety switch)
Charge
Charge
( Replace)
( Check, repair)
Charge
( Check, repair)
( Replace)
( Check, replace)
( Check, repair)
( Replace)
( Check, repair heater relay)
( Check, repair)
Charge
( Replace air conditioner switch)
( Replace blower switch)
( Replace)
OPERATION