Komatsu PC18MR-3, Operation & Maintenance Manual

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TROUBLESHOOTING
WEAM012101
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3.7.6 OTHER TROUBLES
(•) Always contact your Komatsu Distributor when you have to carry out this operation.
• In case of anomalies or problems that are not listed here below, contact your Komatsu Distributor, who will pro-
vide for the necessary repairs.
3.7.6.1 ELECTRICAL SYSTEM
TROUBLE CAUSE SOLUTION
Lights do not work satisfactorily even
with engine running at high speed.
(•) Faulty cables
(•) Faulty fan belt tension.
(•) Blown fuse
(•) Check and repair any loose termi-
nals and connections.
• Adjust fan belt tension.
For details, see “EVERY 500
HOURS OF OPERATION”
• Change.
Lights come on intermittently with en-
gine running.
Battery charge warning light does not
go out even with engine running.
• Faulty alternator.
• Faulty cables. (•) Change.
(•) Check and repair.
Alternator emits abnormal noise. • Faulty alternator. (•) Change.
Starter does not turn with ignition
switch in position ON.
• Faulty cables.
• Battery charge insufficient.
• Faulty fuse.
• Battery main switch turned to OFF. (•) Check and repair.
• Charge battery.
• Change.
• Turn the switch to ON.
Starter pinion engages and disengag-
es repeatedly. • Battery charge insufficient. • Charge battery.
Starter makes engine run slowly.
• Battery charge insufficient.
• Faulty starter. • Charge battery.
(•) Change.
Starter disengages before engine
start. • Faulty cables.
• Battery charge insufficient. (•) Check and repair.
• Charge battery.
Preheating warning light does not
come on. • Faulty cables.
• Faulty bulb. (•) Check and repair.
(•) Change.
Engine oil pressure warning light does
not come on when engine stops (igni-
tion key in position ON). • Faulty bulb.
• Faulty oil pressure switch. (•) Change.
(•) Change.