Removal And Installation; Walk-Around Inspection; Cleaning And Inspecting - Perkins XGA 1600 Series Operation And Maintenance Manual

84
Maintenance Section

Walk-Around Inspection

Note: An inspection is recommended for both
engines, 1600A and 1600D.
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 quan-
tities of oil to enter the air inlet and exhaust systems.
Loss of engine lubricant can result in serious engine
damage.
Minor leakage of a turbocharger housing under ex-
tended low idle operation should not cause problems
as long as a turbocharger bearing failure has not oc-
curred.
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 repaired or
replaced.
An inspection of the turbocharger can minimize
unscheduled downtime. An inspection of the
turbocharger can also reduce the chance for potential
damage to other engine parts.
Note: Turbocharger components require precision
clearances. The turbocharger cartridge must
be balanced due to high rpm. Severe Service
Applications can accelerate component wear.
Severe Service Applications require more frequent
inspections of the cartridge.

Removal and Installation

For options regarding the removal, installation, repair,
and replacement, consult your Perkins distributor.
Refer to the Service Manual for this engine for the
procedure and specifications.

Cleaning and Inspecting

1. Remove the exhaust outlet piping and remove
the air inlet piping from 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.
2. Turn the compressor wheel and the turbine wheel
by hand. The assembly should turn freely. Inspect
the compressor wheel and the turbine wheel for
contact with the turbocharger housing. There
should not be any visible signs of contact between
the turbine wheel or compressor wheel and the
turbocharger housing. If there is any indication of
contact between the rotating turbine wheel or the
compressor wheel and the turbocharger housing,
the turbocharger must be reconditioned.
3. Check the compressor wheel for cleanliness.
If only the blade side of the wheel is dirty, dirt
and/or moisture is passing through the air filtering
system. If oil is found only on the back side of the
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 inlet air (plugged air filters), which causes the
turbocharger to slobber.
4. Use a dial indicator to check the end clearance
on the shaft. If the measured end play is greater
than the Service Manual specifications, the
turbocharger should be repaired or replaced.
An end play measurement that is less than the
minimum Service Manual specifications could
indicate carbon buildup on the turbine wheel. The
turbocharger should be disassembled for cleaning
and for inspection if the measured end play is less
than the minimum Service Manual specifications.
5. Inspect the bore of the turbine housing for
corrosion.
6. Clean the turbocharger 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.
Walk-Around Inspection
Inspect the Engine 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.
SEBU8455
i02568213