Komatsu WA800-3E0 Series Operation & Maintenance Manual page 217

OPERATION
OTHER TROUBLE
ELECTRICAL SYSTEM
q (
): Always contact your Komatsu distributor when dealing with these items.
q 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 hight speed
Lamp flickers while engine is running
Battery charge caution pilot 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 slug-
gishly
Starting motor disengages before
engine starts
Pre-heating monitor does not light
Engine oil pressure monitor lamp
does not light up when engine is
stopped (starting switch at ON posi-
tion)
Battery charge caution pilot lamp
does not light up when engine is
stopped
(starting switch at ON position)
Outside of electrical heater is not
warm when touched by hand
Main causes
•Defective wiring
•Defective adjustment of alternator
best tension
•Defective alternator
•Defective wiring
•Defective alternator
•Defective wiring
•Insufficient battery charge
•Insufficient battery charge
•Insufficient battery charge
•Defective starting motor
•Defective wiring
•Insufficient battery charge
•Defective wiring
•Defective heater relay
•Defective monitor pilot lamp
•Defective wiring
•Defective wiring, defective sensor
•Defective wiring
•Defective monitor
•Defective wiring
•Disconnection in electrical heater
•Defective operation of heater relay
switch
TROUBLESHOOTING
Remedy
(•Check, repair loose terminals,
disconnections)
•Adjust alternator belt tension
For details, see EVERY 250
HOURS SERVICE
(•Replace)
(•Check, repair)
(•Replace)
(•Check, repair)
•Charge
•Charge
•Charge
(•Replace)
(•Check, repair)
•Charge
(•Check, repair)
(•Replace)
(•Replace)
(•Replace)
(•Check, repair, replace)
(•Check, repair)
(•Replace)
(•Check, repair)
(•Replace)
(•Replace heater switch)
3
3
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