Komatsu WA480-8 Operation & Maintenance Manual page 319

OPERATION
Problem
Lamp flickers while engine is run-
ning.
Unusual noise is generated from al-
ternator.
Battery charge level caution lamp
lights up while engine is running.
Starting motor does not rotate even
when starting switch is turned to
START position.
Pinion of starting motor repeats en-
gaging and disengaging (rattles).
Starting motor turns engine sluggish-
ly.
Starting motor disengages before
engine starts.
Preheating pilot lamp does not light
up.
Engine does not start.
("L04" lights up on monitor.)
PHENOMENA AND ACTIONS FOR CHASSIS
• For the remedies indicated with (*) in the remedy column, always contact your Komatsu distributor.
• In cases of problems or causes which are not listed below, ask your Komatsu distributor for repairs.
Problem
Transmission
Engine runs but machine does not
move.
Main causes
Defective wiring
Defective adjustment of belt tension
Defective alternator
Defective alternator
Defective wiring
Defective adjustment of belt tension
Defective wiring
Defective starting motor
Battery disconnect switch at OFF
Engine shutdown secondary switch
at "engine stop" position
Insufficient battery charge
Insufficient battery charge
Defective starting motor
Insufficient battery charge
Defective starting motor
Defective wiring
Defective ring gear and pinion
Insufficient battery charge
Defective wiring
Defective heater relay, heater control-
ler and temperature sensor
Defective monitor
Damaged data in the controller
Other system troubles
Main causes
Parking brake is applied.
Directional lever is not shifted in posi-
tion completely.
Lack of oil in transmission case
TROUBLES AND ACTIONS
Remedy
Check and repair loose terminal or
wire breakage, replace battery. (*)
Check alternator belt tension. See
"EVERY 1000 HOURS MAINTE-
NANCE".
Replace. (*)
Replace. (*)
Check, repair. (*)
Check alternator belt tension. See
"EVERY 1000 HOURS MAINTE-
NANCE".
Check, repair. (*)
Replace. (*)
Turn ON.
Set it "NORMAL" position.
Install cover.
Charge battery.
Charge battery.
Replace. (*)
Charge battery.
Replace. (*)
Check, repair. (*)
Charge battery.
Check, repair. (*)
Replace. (*)
Replace. (*)
Check, repair. (*)
Check, repair. (*)
Remedy
Release the parking brake.
Set the lever completely in position.
Add specified capacity of oil. See
WHEN REQUIRED.
3-251