Komatsu PC20R-8, Руководство по эксплуатации и техническому обслуживанию

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115
TROUBLESHOOTING
3.15.5.3 ENGINE
TROUBLE CAUSE REMEDY
Oil pressure warning light remains on
even with engine at high speed:
•
Oil level in oil pan too low.
•
Oil filter clogged.
•
Oil unsuitable for the season.
•
Top up.
•
Change filter.
•
Change.
Steam comes out of radiator breather
pipe:
Engine coolant temperature indicator
enters the red overheating field:
•
Fluid level low, fluid leakages.
•
Fan belt slackened.
•
Mud or limestone accumulated in
cooling system.
•
Radiator fins damaged or closed.
•
Faulty thermostat.
•
Radiator cap loose or broken. Work-
ing at considerable altitude.
•
Top up, repair.
•
Check belt tension.
•
Change fluid and clean cooling sys-
tem.
•
Repair or clean.
(•)
Change.
•
Tighten cap or change unit.
Engine coolant temperature indicator
always on the right end of the scale:
•
Faulty instrument.
(•)
Change.
Engine coolant temperature indicator
always on the left end of the scale:
•
Faulty thermostat.
•
Faulty instrument.
(•)
Change.
(•)
Change.
Engine does not start with starter run-
ning:
•
No fuel.
•
Air in fuel system.
•
Compression defect (valves with
wrong clearance).
•
Refuel.
•
Bleed system.
(•)
Adjust valve clearance.
Exhaust gases white or light blue:
•
Too much oil in oil pan.
•
Unsuitable fuel.
•
Correct oil level.
•
Change with suitable fuel.
Exhaust gases occasionally tend to be
black:
•
Air cleaner clogged.
•
Faulty injectors.
•
Faulty compression.
•
Clean or change.
(•)
Change.
(•)
Adjust valve clearance.
Combustion noise occasionally resem-
bles a blow:
•
Faulty injectors.
(•)
Change.
Abnormal noises (during combustion
or in mechanical parts):
•
Fuel with low cetane rating.
•
Overheating.
•
Exhaust silencer inside damaged.
•
Excessive valve clearance.
•
Change with fuel in compliance with
standards.
•
See “defects of temperature indica-
tor”.
(•)
Change.
(•)
Adjust valve clearance.