Komatsu PC22MR-3, Operation & Maintenance Manual

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TROUBLESHOOTING
FUNCTIONING
3-118
Engine 3
q
( ): Always contact the Komatsu distributor when you must carry out these operations.
q
If the anomaly or its cause is not included in the table below, contact your Komatsu distributor for the
necessary repair.
Hydraulic oil temperature increases
excessively.
q
No hydraulic oil.
q
Fan belt slack.
q
Radiator or exchanger fins
clogged.
q
Restore level. See "Checks to be
carried out before starting the
engine".
q
Adjust fan belt tension. See
"Every 500 hours".
q
Clean or repair. See "Every 500
hours of operation".
Tracks come off. q
Slack tracks.
q
Adjust track tension. See "When
required"
Sprocket excessively worn.
TROUBLE CAUSE SOLUTION
TROUBLE CAUSE SOLUTION
The engine oil pressure warning light
blinks (and the acoustic alarm
sounds at the same time).
q
Oil level in oil pan too low (air
sucked in).
q
Oil filter clogged.
q
Oil leakage due to damage or
incorrect tightening of oil pipes or
joints.
q
Engine oil pressure sensor faulty.
q
Restore level. See "Checks to be
carried out before starting the
engine".
q
Replace cartridge.
See "Every 500 hours".
q
(Check and repair).
q
(Change).
Steam comes out of radiator top
(pressure valve).
q
Fluid level low, fluid leakages.
q
Fan belt slack.
q
Mud or limestone accumulated in
cooling system.
q
Radiator fins damaged or closed.
q
Faulty thermostat.
q
Radiator cap loose (work at
considerable heights).
q
Fluid level sensor faulty.
q
Add fluid, repair. See "Checks to
be carried out before starting the
engine".
q
Adjust fan belt tension. See
"Every 500 hours".
q
Change fluid and clean cooling
system. See "When required"
q
Clean or repair. See "Every 500
hours".
q
(Change).
q
Tighten cap or change unit.
q
(Change).
The engine water temperature
indicator has reached the red
overheating area (warning light
blinks and acoustic alarm sounds at
the same time)
Even if the engine runs for a long
time, the engine water temperature
indicator does not reach the correct
range.
q
Faulty thermostat.
q
Faulty display.
q
(Change).
q
(Change display).
The warning light blinks even when
the engine water temperature
indicator is in the correct range.
q
Faulty thermostat.
q
(Change).
WEAM014500