Komatsu PC490LC User Manual

1.
Connect the clip of jumper cable (A) to the positive (+) ter-
minal of battery (C) on the failed machine.
2.
Connect the clip at the other end of jumper cable (A) to the
positive (+) terminal of battery (D) on the normal machine.
3.
Connect the clip of jumper cable (B) to the negative (-) ter-
minal of battery (D) on the normal machine.
4.
Turn the battery disconnect switch (S) of the failed ma-
chine to ON position.
5.
Connect the other clip of jumper cable (B) to the revolving
frame (E) of the failed machine.
METHOD FOR STARTING ENGINE
1.
Check both of normal machine and failed machine that the lock lever is set to LOCK position.
Check also that all the control levers are in NEUTRAL position.
2.
Make sure the clips are firmly connected to the battery terminals.
3.
Start the engine of the normal machine and run it at high idle (max. speed).
4.
Turn the starting switch of the failed machine to START position and start the engine.
If the engine does not start, try again after at least 2 minutes.
PROCEDURE FOR REMOVING JUMPER CABLE
After the engine has started, disconnect the jumper cables in the reverse of the order in which they were con-
nected.
1.
Remove the clip of jumper cable (B) from the revolving
frame (E) of the failed machine.
2.
Remove the clip of jumper cable (B) from the negative (-)
terminal of battery (D) on the normal machine.
3.
Remove the clip of jumper cable (A) from the positive (+)
terminal of battery (D) on the normal machine.
4.
Remove the clip of jumper cable (A) from the positive (+)
terminal of battery (C) on the failed machine.
OTHER TROUBLE
PHENOMENA AND ACTIONS FOR ELECTRICAL SYSTEM
• 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
Lamp does not glow brightly even
when the engine runs at high
speeds.
Defective wiring, deterioration of bat-
tery
Check and repair loose terminal or
wire breakage, replace battery. (*)
Loosening and damage of alternator
belt
Check alternator belt tension and re-
place. (*)
Lamp flickers while engine is run-
ning.
Defective wiring, deterioration of bat-
tery
Check and repair loose terminal or
wire breakage, replace battery. (*)
Loosening and damage of alternator
belt
Check alternator belt tension and re-
place. (*)
Charge level caution lamp does not
go out even when engine is running.
Defective alternator Replace. (*)
Defective wiring Check, repair. (*)
OPERATION TROUBLES AND ACTIONS
3-263

Komatsu PC490LC Specifications

General

Brand	Komatsu
Model	PC490LC
Category	Excavators
Language	English