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3.31 Other trouble
3.31
Other trouble
3.31.1
Electrical system
( ) Always contact your KOMATSU distributor when dealing
with these items.
In cases of abnormalities or causes which are not listed
below, please 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 level monitor 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
Oil pressure monitor does not light
up when engine is stopped (starting
switch at ON position)
Outside of electrical heater is not
warm when touched by hand
3-176
Main causes
Defective wiring, deterioration of
battery
Loose fan belt
Defective alternator
Defective wiring
Defective alternator
Defective wiring
Defective starting motor
Insufficient battery charge
Insufficient battery charge
Defective safety relay
Insufficient battery charge
Defective starting motor
Defective wiring, defective ring
gear pinion
Insufficient battery charge
Defective wiring
Defective heater relay
Defective monitor
Defective monitor
Defective caution lamp switch
Defective wiring
Disconnection in electric heater
Defective operation of heater
relay switch
Remedy
(Check, repair loose terminals,
disconnections, replace battery)
Check fan belt tension, replace
(Replace)
(Check, repair)
(Replace)
(Check, repair)
(Replace)
Charge
Charge
(Replace)
Charge
(Replace)
(Check, repair)
Charge
(Check, repair)
(Replace)
(Replace)
(Replace)
(Replace)
(Check, repair)
(Replace)
(Replace)
PW180-7E0 – VEAM400102
Operation
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