Other Troubles - Komatsu WB93S-5 F50003 Operation & Maintenance Manual

3.15.4 OTHER TROUBLES

(•) Always contact your Komatsu Dealer when you have to carry out this operation.
• If the anomaly or its cause is not included in the table below, contact your Komatsu Dealer for the necessary
repair.
3.15.4.1 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
disengages:
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 « »):
3.15.4.2 HYDRAULIC SYSTEM
TROUBLE
Pump emits an abnormal noise:
Equipment control levers do not return
automatically to neutral position:
Equipment moves only at low speed:
• Faulty cables.
• Faulty fan belt tension.
• Faulty alternator.
• Faulty cables.
• Faulty alternator.
• Faulty cables.
• Battery charge insufficient.
• Faulty engine start fuse.
and then • Battery charge insufficient.
• Battery charge insufficient.
• Faulty starter.
• Faulty cables.
• Battery charge insufficient.
• Faulty bulb.
• Faulty pressure sensor.
• Faulty bulb.
• Faulty cables.
• No oil in the tank.
• Faulty pump.
• Hydraulic oil unsuitable for the
temperature.
• Broken return spring or seized
element.
• Faulty pump.
• Max. pressure valves out of rating,
or not closed due to impurities.
• Dirty drain filter.
CAUSE
CAUSE
TROUBLESHOOTING
REMEDY
(•) Check and repair any loose terminal
and connection.
• Adjust fan tension
(see "EVERY 250 HOURS).
(•) Change.
(•) Check and repair.
(•) Change.
(•) Check and repair.
• Charge the battery.
• Change.
• Charge the battery.
• Charge the battery.
(•) Change.
(•) Check and repair.
• Charge the battery.
(•) Change.
(•) Change.
(•) Change.
(•) Check and repair.
REMEDY
• Top up.
(•) Repair or change.
• Change.
(•) Change spring or distributor
element.
(•) Repair or change.
(•) Calibrate or change.
• Change.
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