SEBU8605-01 109
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.
i04293330
Tu rbocharger - Inspect
Hot engine c omponents can ca use injury from
burns. Be
fore performing m aintenance on the
engine, allow the engine and the components to
cool.
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 o f the turbocharger or
turbochargers can minimize unscheduled downtime.
A visual inspection o f the turbocharger or
turbochargers can also reduce the chance for
potential damage to other engine parts. Do not
inspect the engine with the engine in operation.
Single Turbocharger
g02136079
Illustration 76
Typical example
1. Ensure that the turbocharger is clean and free from
dirt before removing components for inspection.
2. Remove the pipe from the turbocharger exhaust
outlet and remove the air intake pipe (1). Visually
inspect the piping for the presence of oil. Clean
the interior of the pipes in order to prevent dirt
from entering during reassembly.
3. Check for obvious heat discoloration of the
turbocharger. Check for any loose bolts or any
missing bolts. Check for damage to the oil supply
line and the oil drain line. Check for cracks in
the housing of the turbocharger. Ensure that the
compressor wheel can rotate freely.
4. Check for the presence of oil. If oil is leaking from
the back side of the compressor wheel, there is a
possibility of a failed turbocharger oil seal.
The presence 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 intake air (clogged air filters), which causes
the turbocharger to slobber.
5. Install the air intake pipe and the exhaust outlet
pipe to the turbocharger housing. Ensure that all
clamps are installed correctly and that all clamps
are tightened securely. For more information, refer
to Systems Operation, Testing, and Adjusting,
“Turbocharger - Inspect”.
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