This document is printed from SPI². Not for RESALE
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 containers
before opening any compartment or disassembling
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 54 g02529616
Typical example
(1) Turbine housing
(2) Compressor housing
1. Inspect the compressor wheel for damage from a
foreign object. 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.
b. Inspect the engine air cleaner element.
Replace a dirty engine air cleaner element with
a clean engine air cleaner element. Refer to
Operation and Maintenance Manual, “Engine
Air Cleaner Element (Dual Element) - Clean/
Replace” or Operation and Maintenance
Manual, “Engine Air Cleaner Element (Single
Element) - Replace” for the correct procedure.
Inspect the engine air cleaner service
indicator. Refer to Operation and Maintenance
Manual, “Engine Air Cleaner Service Indicator
- Inspect” for the correct procedure.
c. Inspect the engine crankcase breather. Clean
the engine crankcase breather or replace the
engine crankcase breather if the engine
crankcase breather is plugged.
d. Remove the pipe for the oil drain. Inspect the
drain opening. Inspect the oil drain line.
Inspect the area between the bearings of the
rotating assembly shaft. Look for the oil
sludge. Inspect the oil drain hole for the oil
sludge. Inspect the oil drain line for the oil
sludge in the drain line. If necessary, clean the
oil drain line. Replace the oil drain line if there
is any sign of damage to the oil drain line.
e. If steps 3.a. through 3.d. did not reveal the
source of the oil leakage, the turbocharger has
internal damage. Replace the turbocharger.
Inspection of the Turbine Wheel
and the Turbine Housing
Remove the air piping from the turbine housing.
60 UENR0623
Air Inlet and Exhaust System
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