Other Troubles; Electrical Circuit; Hydraulic System - Komatsu PC12R-8 Operation & Maintenance Manual

TROUBLESHOOTING

3.16.5 OTHER TROUBLES

(•): Always contact your Komatsu Utility Dealer when you have to carry out this operation.
• : If the anomaly or its cause are not included in the failures indicated below, contact your Komatsu Utility Deal-
er for the necessary repair.

3.16.5.1 ELECTRICAL CIRCUIT

TROUBLE
Lights do not work satisfactorily even
with engine running at high speed:
Lights come on intermittently with
engine running:
Alternator charge warning light does
not go out with engine running and
increasing speed:
Alternator emits an abnormal noise:
Starter does not turn with key in
START position:
Starter pinion engages and then dis-
engages:
Starter makes engine run slowly:
Starter disengages before engine has
started:
Engine oil pressure warning light does
not come on when engine is stopped
(ignition key in position « »):
Alternator charge warning light does
not come on when engine is stopped
(ignition key in position « »):

3.16.5.2 HYDRAULIC SYSTEM

TROUBLE
Pump emits an abnormal noise:
Equipment control levers do not return
automatically to neutral position:
Equipment moves only at low speed:
116
CAUSE
•
Faulty cables.
•
Faulty fan belt tension.
•
Faulty alternator.
•
Faulty cables.
•
Faulty alternator.
•
Faulty cables.
•
Battery charge insufficient.
•
Faulty main fuse.
•
Battery charge insufficient.
•
Battery charge insufficient.
•
Faulty starter.
•
Faulty cables.
•
Battery charge insufficient.
•
Faulty bulb.
•
Faulty pressure sensor.
•
Faulty bulb.
•
Faulty cables.
CAUSE
•
No oil in the tank.
•
Faulty pump.
•
Hydraulic oil unsuitable for the tem-
perature.
•
Broken return spring or seized ele-
ment.
•
Faulty pump.
•
Max. pressure valve setting incor-
rect, or valves not closed due to im-
purities.
•
Dirty drain filter.
REMEDY
(•)
Check and repair any loose termi-
nal and connection.
•
Adjust fan tension (see "EVERY 250
HOURS").
(•)
Change.
(•)
Check and repair.
(•)
Change.
(•)
Check and repair.
•
Charge battery.
•
Change.
•
Charge battery.
•
Charge battery.
(•)
Change.
(•)
Check and repair.
•
Charge battery.
(•)
Change.
(•)
Change.
(•)
Change.
(•)
Check and repair.
REMEDY
•
Top up.
(•)
Repair or change.
•
Change.
(•)
Change spring or distributor ele-
ment.
(•)
Repair or change.
(•)
Set or change.
•
Change.