Other Trouble - Komatsu D37EX-24 Operation & Maintenance Manual

TROUBLES AND ACTIONS

OTHER TROUBLE

PHENOMENA AND ACTIONS FOR ELECTRICAL SYSTEM
• Contact your Komatsu distributor for the remedies indicated with (*) in the remedy column.
• Ask your Komatsu distributor for repairs for problems or causes which are not listed below.
Problem
Lamp does not glow brightly even
when the engine runs at high speeds.
Lamp flickers while engine is running. Defective wiring
Charge level caution lamp does not
go out even when engine is running.
Unusual noise is generated from al-
ternator
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 incapable of cranking
engine smoothly.
Starting motor disengages before en-
gine starts.
Automatic preheating does not work.
Preheating pilot lamp does not light
up.
(When engine coolant temperature is
-3 °C or below.)
Oil pressure caution lamp does not
light up even when engine is stop-
ped.
(Starting switch is at ON position.)
3-214
Main causes
Defective wiring
Incorrect adjustment of belt tension
Incorrect adjustment of belt tension
Defective alternator
Defective wiring
Defective alternator
Defective wiring
Insufficient battery charge
Battery disconnect switch is at OFF
position.
Engine shutdown secondary switch is
at "ENGINE STOP" position
Incorrect adjustment of safety switch
Insufficient battery charge
Insufficient battery charge
Defective starting motor
Defective wiring
Insufficient battery charge
Defective wiring
Defective heater relay
Defective engine controller
Defective wiring
Defective heater relay
Defective monitor
Defective monitor
Defective caution lamp switch
Remedy
Check and repair loose terminals,
open circuit. (*)
Adjust alternator drive belt tension.
See EVERY 1000 HOURS MAINTE-
NANCE.
Check and repair loose terminals,
open circuit. (*)
Adjust alternator drive belt tension.
See EVERY 1000 HOURS MAINTE-
NANCE.
Replace. (*)
Check, repair. (*)
Replace. (*)
Check, repair. (*)
Charge the battery.
Turn it to ON position.
Set it "NORMAL" position.
Adjust safety switch. (*)
Charge the battery.
Charge the battery.
Replace. (*)
Check, repair. (*)
Charge the battery.
Check, repair. (*)
Replace. (*)
Check, replace. (*)
Check, repair. (*)
Replace. (*)
Replace. (*)
Replace. (*)
Replace. (*)
OPERATION