Other Trouble - Komatsu D475A-5E0 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, ask 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 crank
when starting switch is turned ON
Pinion of starting motor keeps
going in and out
Starting motor turns engine
sluggishly
Starting motor disengages before
engine starts
Engine pre-heating monitor lamp
does not light up
(When the temperature of the
engine coolant exceed 20 ° C
(68 ° F), this condition is normal)
Air conditioner operation is
defective
Blade does not pitch when pitch
operation is carried out (dual tilt
specification machine only)
3 - 184
Main cause
Defective wiring
Defective adjustment of fan belt
tension
Defective alternator
Defective wiring
Defective alternator
Defective wiring
Battery isolator switch is OFF
(if equipped)
Insufficient battery charge
Insufficient battery charge
Insufficient battery charge
Defective starting motor
Defective wiring
Insufficient battery charge
Defective wiring
Defective timer
Defective monitor
Disconnection in glow plug
Blown fuse
Insufficient battery charge
Defective air conditioner switch
Defective blower switch
Defective compressor
Defective wiring
Defective switch
Defective solenoid valve
Remedy
( Check, repair loose terminals,
disconnections
Check fuses and diodes in fuse
box)
Adjust fan belt tension
For details, see EVERY 250
HOURS SERVICE
( Replace)
( Check, repair
Check fuse, diode in fuse box)
( Replace)
( Check, repair)
Turn switch ON.
Charge
Charge
Charge
( Replace)
( Check, repair)
Charge
( Check, repair)
( Replace)
( Replace)
( Replace)
( Check, repair)
Charge
( Replace air conditioner switch)
( Replace blower switch)
( Replace)
( Check, repair)
( Replace)
( Replace)
OPERATION