Problem Main causes Remedy
Lamp flickers while engine is run-
ning.
Defective wiring Check and repair loose terminal or
wire breakage, replace battery
. (*)
Defective adjustment of belt tension Check alternator belt tension. See
"EVERY 1000 HOURS MAINTE-
NANCE".
Unusual noise is generated from al-
ternator.
Defective alternator Replace. (*)
Battery charge level caution lamp
lights up while engine is running.
Defective alternator Replace. (*)
Defective wiring Check, repair
. (*)
Defective adjustment of belt tension
Check alternator belt tension. See
"EVER
Y 1000 HOURS MAINTE-
NANCE".
Starting motor does not rotate even
when starting switch is turned to
START position.
Defective wiring Check, repair
. (*)
Defective starting motor Replace. (*)
Battery disconnect switch at OFF Turn ON.
Engine shutdown secondary switch
at “engine stop”
position
Set it “NORMAL” position.
Install cover.
Insufficient battery charge Charge battery
.
Pinion of starting motor repeats en-
gaging and disengaging (rattles).
Insufficient battery charge Charge battery.
Defective starting motor Replace. (*)
Starting motor turns engine sluggish-
ly
.
Insufficient battery charge Charge battery
.
Defective starting motor Replace. (*)
Starting motor disengages before
engine starts.
Defective wiring
Defective ring gear and pinion
Check, repair. (*)
Insufficient battery charge Charge battery.
Preheating pilot lamp does not light
up.
Defective wiring Check, repair. (*)
Defective heater relay, heater control-
ler and temperature sensor
Replace. (*)
Defective monitor Replace. (*)
Engine does not start.
(“L04” lights up on monitor
.)
Damaged data in the controller Check, repair
. (*)
Other system troubles Check, repair. (*)
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 Main causes Remedy
Transmission
Engine runs but machine does not
move.
Parking brake is applied. Release the parking brake.
Directional lever is not shifted in posi-
tion completely
.
Set the lever completely in position.
Lack of oil in transmission case Add specified capacity of oil. See
WHEN REQUIRED.
TROUBLES AND ACTIONS OPERATION
3-252
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