114
TROUBLESHOOTING
3.15.5 OTHER TROUBLES
3.15.5.1 ELECTRICAL CIRCUIT
3.15.5.2 HYDRAULIC SYSTEM
(•):
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.
TROUBLE CAUSE REMEDY
Lights do not work satisfactorily even
with engine running at high speed:
•
Faulty cables.
•
Faulty fan belt tension.
(•)
Check and repair any loose termi-
nal and connection.
•
Adjust fan tension (see “EVERY 250
HOURS”).
Lights come on intermittently with
engine running:
Alternator charge warning light does
not go out with engine running and
increasing speed:
•
Faulty alternator.
•
Faulty cables.
(•)
Change.
(•)
Check and repair.
Alternator emits an abnormal noise:
•
Faulty alternator.
(•)
Change.
Starter does not turn with key in
START position:
•
Faulty cables.
•
Battery charge insufficient.
•
Faulty main fuse.
(•)
Check and repair.
•
Charge battery.
•
Change.
Starter pinion engages and then dis-
engages:
•
Battery charge insufficient.
•
Charge battery.
Starter makes engine run slowly:
•
Battery charge insufficient.
•
Faulty starter.
•
Charge battery.
(•)
Change.
Starter disengages before engine has
started:
•
Faulty cables.
•
Battery charge insufficient.
(•)
Check and repair.
•
Charge battery.
Engine oil pressure warning light does
not come on when engine is stopped
(ignition key in position
« »):
•
Faulty bulb.
•
Faulty pressure sensor.
(•)
Change.
(•)
Change.
Alternator charge warning light does
not come on when engine is stopped
(ignition key in position « »):
•
Faulty bulb.
•
Faulty cables.
(•)
Change.
(•)
Check and repair.
TROUBLE CAUSE REMEDY
Pump emits an abnormal noise:
•
No oil in the tank.
•
Faulty pump.
•
Hydraulic oil unsuitable for the tem-
perature.
•
Top up.
(•)
Repair or change.
•
Change.
Equipment control levers do not return
automatically to neutral position:
•
Broken return spring or seized ele-
ment.
(•)
Change spring or distributor ele-
ment.
Equipment moves only at low speed:
•
Faulty pump.
•
Max. pressure valve setting incor-
rect, or valves not closed due to im-
purities.
•
Dirty drain filter.
(•)
Repair or change.
(•)
Set or change.
•
Change.
Summary of Contents for PC20R-8
Page 2: ......
Page 12: ...10...
Page 20: ...18...
Page 21: ...SAFETY AND ACCIDENT PREVENTION...
Page 23: ...SAFETY NOISE AND VIBRATION PLATES 21 MACHINE WITH CANOPY RWA00010 RWA00030 RWA00020 RYA11890...
Page 54: ...52...
Page 55: ...THE MACHINE AND ITS OPERATIONS...
Page 118: ...116...
Page 119: ...MAINTENANCE...
Page 172: ...170...
Page 173: ...TECHNICAL SPECIFICATIONS...
Page 182: ...180...
Page 183: ...AUTHORISED OPTIONAL EQUIPMENT...
