Air Intake and Exhaust System
02
080
6
DPSG,OUO1004,945 –19–28JUL99–1/13
Turbocharger Seven-Step Inspection
The following inspection procedure is recommended
for systematic failure analysis of a suspected failed
turbocharger. This procedure will help to identify when
a turbocharger has failed and why it has failed, so the
primary cause of the failure can be corrected.
Proper diagnosis of a non-failed turbocharger is
important for two reasons. First, identification of a
non-failed turbocharger will lead to further investigation
and repair of the cause of a performance complaint.
Second, proper diagnosis eliminates the unnecessary
expense incurred when a non-failed turbocharger is
replaced.
The seven recommended inspection steps, which are
explained in detail on the following pages, are:
• Compressor Housing Inlet and Compressor Wheel.
• Compressor Housing Outlet.
• Turbine Housing Inlet.
• Turbine Housing Outlet and Turbine Wheel.
• External Center Housing and Joints.
• Internal Center Housing.
• Turbocharger Bench Test.
NOTE: To enhance the turbocharger inspection, an
inspection sheet (Form No. DF-2280 available
from Distribution Service Center—English only)
can be used that lists the inspection steps in
the proper order and shows potential failure
modes for each step. Check off each step as
you complete the inspection and record any
details or problems obtained during inspection.
Retain this with the work order for future
reference.
DPSG,OUO1004,945 –19–28JUL99–2/13
RG4523 –UN–03NOV97
Checking Inlet and Compressor Wheel
A—Compressor Wheel
Compressor Housing Inlet and Compressor Wheel
1. Check compressor inlet and compressor wheel (A) for
foreign object damage.
NOTE: Foreign object damage may be extensive or
minor. In either case, the source of the foreign
object must be found and corrected to eliminate
further damage.
2. Mark findings on your checklist and continue the
inspection.
Continued on next page
CTM100 (06APR04)
02-080-6
P
OWER
T
ECH
10.5 L & 12.5 L Diesel Engines
040604
PN=306
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