NOTICE
Keep all parts clean from contaminants.
Contaminants may cause rapid wear and shortened
component life.
NOTICE
Care must be taken to ensure that fluids are con-
tained during performance of inspection, mainte-
nance, testing, adjusting and repair of the product.
Be prepared to collect the fluid with suitable contain-
ers before opening any compartment or disassem-
bling any component containing fluids.
Dispose of all fluids according to local regulations
and mandates.
Before you begin inspection of the turbocharger, be
sure that the inlet air restriction is within the
specifications for your engine. Be sure that the
exhaust system restriction is within the specifications
for your engine. Refer to Systems Operation, Testing,
and Adjusting, “Air Inlet and Exhaust System -
Inspect”.
The condition of the turbocharger will have definite
effects on engine performance. Use the following
inspections and procedures to determine the
condition of the turbocharger.
• Inspection of the compressor and the compressor
housing
• Inspection of the turbine wheel and the turbine
housing
• Inspection of the wastegate
Inspection of the Compressor and
the Compressor Housing
Illustration 78 g02466996
Typical example
(1) Turbine housing
(2) Compressor housing
(3) Ducts
1. Inspect the compressor wheel and the ducts for
damage from a foreign object. The ducts can be
removed. If there is damage, determine the source
of the foreign object. Replace the turbocharger. If
there is no damage, go to step 2.
2. Turn the rotating assembly by hand. While you turn
the assembly, push the assembly sideways. The
assembly should turn freely. The compressor
wheel should not rub the compressor housing. The
turbocharger must be replaced if the compressor
wheel rubs the compressor wheel housing. If there
is no rubbing or scraping, go to step 3.
3. Inspect the compressor and the compressor wheel
housing for oil leakage. An oil leak from the
compressor may deposit oil in the aftercooler. If oil
is found in the aftercooler, then drain and clean the
aftercooler.
a. Check the oil level in the crankcase. If the oil
level is too high, adjust the oil level.
UENR4490-01 89
Air Inlet and Exhaust System
This document has been printed from SPI2. NOT FOR RESALE
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