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110
SEBU8605-01
Maintenance Section
Walk-Around Inspection
Engine Install with High Pressure
and Low Pressure Turbochargers
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Illustration 77
Typical example
The engine is equipped with a high-pressure
turbocharger (1) and a low-pressure turbocharger (3).
A regular visual inspection of both turbochargers is
recommended. 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 damage the
pistons, the valves, and the cylinder head.
Inspecting
NOTICE
The compressor housing for the turbocharger must
not be removed from the turbocharger for inspection
or removed for the cleaning of the compressor.
1.
Ensure that the turbochargers are clean and
free from dirt before removing components for
inspection.
2.
Remove the pipe from the high-pressure
turbocharger exhaust outlet and remove the air
intake pipe to the turbocharger. 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.
Remove elbow (2) and check for the presence of
engine oil.
4.
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.
5.
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
fi
lters), which causes
the turbocharger to slobber.
6.
Inspect the bore of the housing of the turbine
outlet for corrosion.
7.
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”.
i03893509
Walk-Around Inspection
Inspect the Tube of the Crankcase
Breather
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Illustration 78