SEBU8191-01 71
Maintenance Section
Walk-Around Inspection
Thepresenceof
oil may be the result of extended
engine operation at no load. The presence of oil
may also result from restriction of the inlet air
(plugged air fi
lters). This causes oil to leak past
the seal for the turbocharger compressor.
Note: Deposi
ts of ash and silicone can accumulate
on the turbine wheel. Turbine wheel will become
unbalanced when the deposits fl ake off. The
turbocharg
er cartridge must be replaced when the
turbine wheel becomes unbalanced. However,
remove deposits from the housing. Removing
deposits fr
om the housing will prevent wear on the
blades of the new turbine wheel.
4. Inspect th
e turbine wheel and the housing for
deposits of ash and silicone. If deposits of 1.6 mm
(0.06 inch) thickness are found or if the turbine
is in conta
ct with the housing, the turbocharger
must be disassembled and cleaned. Removal of
the deposits can be difficult.
5. Inspect the bore of the turbine housing for
corrosion and deposits.
6. Clean the turbocharger compressor housing with
standard shop solvents and a soft bristle brush.
7. Fasten the air inlet piping and the exhaust outlet
piping to the turbocharger housing.
i02415322
Wa lk-Aro und Inspection
A walk-around inspection should only take a few
minutes. When the time is taken to perform these
checks, costly repairs and accidents can be avoided.
For maximum engine service life, make a thorough
inspection of the engine compartment before starting
the engine. Look for items such as oil leaks or coolant
leaks, loose bolts, worn belts, loose connections and
trash buildup. Make repairs, as needed:
•
The guards must be in the correct place. Repair
damaged guards or replace missing guards.
•
Wipe all caps and plugs before the engine is
serviced in order to reduce the chance of system
contamination.
NOTICE
For any type of
leak (coolant, lube, or fuel) clean up the
fluid. If leaking is observed, find the source and correct
the leak. If leaking is suspected, check the fluid levels
more often tha
n recommended until the leak is found
or fixed, or until the suspicion of a leak is proved to be
unwarranted.
NOTICE
Accumulated grease and/or oil on an engine is a fire
hazard. Remove the accumulated grease and oil. Re-
fer to Operation and Maintenance Manual, “Engine -
Clean” for more information.
•
Ensure that the cooling system hoses are correctly
clamped and that the cooling system hoses are
tight. Check for leaks. Check the condition of all
pipes.
•
Inspect the water pumps for coolant leaks.
Note: The water pump seal is lubricated by the
coolant in the cooling system. It is normal for a small
amount of leakage to occur as the engine cools down
and the parts contract.
Excessive coolant leakage may indicate the need
to replace a water pump. Refer to Operation and
Maintenance Manual, “Water Pump - Inspect” for
more information. If necessary, consult your Perkins
dealer or your Perkins distributor.
•
Inspect the lubrication system for leaks at the front
crankshaft seal, the rear crankshaft seal, the oil
pan, the oil filters and the rocker cover.
•
Inspect the piping for the air intake system and the
elbows for cracks and for loose clamps. Ensure
that hoses and tubes are not contacting other
hoses, tubes, wiring harnesses, etc.
•
Ensure that the areas around the rotating parts are
clear.
•
Inspect the alternator belt and fan drive belts for
cracks, breaks or other damage.
•
Inspect the wiring harness for damage.
Belts for multiple groove pulleys must be replaced as
matched sets. If only one belt is replaced, the belt will
carry more load than the belts that are not replaced.
The older belts are stretched. The additional load on
the new belt could cause the belt to break.
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