Engine - Komatsu PC27R-8 Operation & Maintenance Manual

3.15.5.3 ENGINE

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