SEBU8121 79
Maintenance Section
Turbocharger - Inspect
Check the start
ing motor for correct operation. Check
the electrical connections and clean the electrical
connections. Refer to the Systems Operation, Testing
and Adjusting
Manual, “Electric Starting System -
Test” for more information on the checking procedure
and for specifications or consult your Perkins dealer
or your Perki
ns distributor for assistance.
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Turboc harger - Inspect
(If Equipped)
A regular visual inspection of the turbocharger is
recommended. Any fumes from the crankcase are
filtered through the air inlet system. Therefore,
by-products from oil and from combustion can collect
in the turbocharger compressor housing. Over time,
this buildup can contribute to loss of engine power,
increased black smoke and overall loss of engine
efficiency.
If the turbocharger fails during engine operation,
damage to the turbocharger compressor wheel
and/or to the engine may occur. Damage to the
turbocharger compressor wheel can cause additional
damage to the pistons, the valves, and the cylinder
head.
NOTICE
Turbocharger bearing failures can cause large quanti-
ties of oil to enter the air intake and exhaust systems.
Loss of engine lubricant can result in serious engine
damage.
Minor leakage of oil into a turbocharger under extend-
ed low idle operation should not cause problems as
long as a turbocharger bearing failure has not oc-
cured.
When a turbocharger bearing failure is accompanied
by a significant engine performance loss (exhaust
smoke or engine rpm up at no load), do not continue
engine operation until the turbocharger is renewed.
A visual inspection of the turbocharger can minimize
unscheduled downtime. A visual inspection of the
turbocharger can also reduce the chance for potential
damage to other engine parts.
Remo val a nd Installation
Note: The turbochargers that are supplied are
nonserviceable.
For options reg
arding the removal, installation, and
replacement, consult your Perkins dealer or your
Perkins distributor. Refer to the Disassembly and
Assembly Manu
al, “Turbocharger - Remove and
Turbocharger - Install” for further information.
Inspecting
NOTICE
The compress
or housing for the turbocharger must
not be removed from the turbocharger for cleaning.
The actuator
linkage is connected to the compressor
housing. If the actuator linkage is moved or disturbed
the engine may not comply with emmissions legisla-
tion.
1. Remove the pipe from the turbocharger exhaust
outlet and remove the air intake pipe to the
turbocharg
er. Visually inspect the piping for the
presence of oil. Clean the interior of the pipes
in order to prevent dirt from entering during
reassembly
.
2. Checkforthepresenceofoil.Ifoilisleakingfrom
the back si
de of the compressor wheel, there is a
possibility of a failed turbocharger oil seal.
The presen
ce of oil may be the result of extended
engine operation at low idle. The presence of oil
may also be the result of a restriction of the line
for the int
ake air (clogged air filters), which causes
the turbocharger to slobber.
3. Inspect t
he bore of the housing of the turbine
outlet for corrosion.
4. Fasten th
e air intake pipe and the exhaust outlet
pipe to the turbocharger housing.
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Walk-Arou nd Inspectio n
Inspect the En gine for Leaks and
for Loose Connections
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:
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