Komatsu D31EX-21, Руководство по эксплуатации и техническому обслуживанию, Страница: 177 / 256

OPERATION
TROUBLESHOOTING
3-125
OTHER TROUBLE 3
ELECTRICAL SYSTEM 3
q
( ): Always contact your Komatsu distributor when dealing with these items.
q
In cases of abnormalities 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
•Defective adjustment of belt tension
(•Check, repair loose terminals, dis-
connections)
•Adjust fan belt tension. For
details, see EVERY 250
HOURS SERVICE
Lamp flackers while engine is run-
ning
Charge lamp does not goes out
even when engine is running
•Defective alternator
•Defective wiring
•Defective alternator belt (•Replace)
(•Check, repair)
(•Replace)
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
•Defective safety switch (•Check, repair)
•Charge
(•Replace)
Pinion of starting motor keeps
going in and out •Insufficient battery charge •Charge
Starting motor turns engine slug-
gishly •Insufficient battery charge
•Defective starting motor •Charge
(•Replace)
Starting motor disengages before
engine starts •Defective wiring
•Insufficient battery charge (•Check, repair)
•Charge
Engine preheating pirot lamp dose
not go out •Defective wiring
•Defective heater relay (•Check, repair)
(•Replace)
Outside of electrical intake air
heater is not warm when touched
by hand •Defective wiring
•Disconnection in electrical intake air
heater
•Defective operation of heater relay
switch (•Check, repair)
(•Replace)
(•Check, repair heater switch)
Air conditioner does not work
properly •Blown fuse
•Insufficient battery charge
•Defective aie conditioner switch
•Defective air flow selector switch
•Defwective compressor (•Check repair)
•Charge
(•Repalce air conditioner switch)
(•Replace air flow selector switch)
(•Replace)