TM 5-3805-280-24-2
Air Intake and Exhaust System
TURBOCHARGER FAILURE ANALYSIS
30
6
The following is a guide for diagnosing the cause of
turbocharger failures after removal from the engine.
COMPRESSOR HOUSING INLET
DEFECTS
Problem
Possible Cause
Suggested Remedy
Foreign Object Damage
Objects left in intake system.
Disassemble and inspect intake system for foreign objects
(this group).
Inspect engine for internal damage.
Leaking and/or defective intake
Inspect air intake system connections including air filter;
system.
repair as required (this group).
Inspect air intake related engine components.
Compressor Wheel Rub
Bearing failure.
Determine if engine and/or operator contributed to lack of
lubrication,contaminated lubrication, excessive
temperature,or debris generating engine failure in
progress. Correct as required.
Manufacturing defects.
Correct as required.
COMPRESSOR HOUSING OUTLET
DEFECTS
Problem
Possible Cause
Suggested Remedy
Oil and/or Dirt in Housing
Restricted air intake system.
Inspect and clean air cleaner.
Prolonged periods of low RPM engine
Check with operator to confirm conditions. (See operator's
idling.
manual.)
Defective oil seal ring.
Repair as required. (This group.)
Restricted oil drain line.
Inspect and clear oil drain line as required.
TURBINE HOUSING INLET
DEFECTS
Problem
Possible Cause
Suggested Remedy
Oil in Housing
Internal engine failure.
Inspect and repair engine as required.
Oil leaking from compressor housing
Verify that oil is in compressor housing and refer to
seal.
"Compressor Housing Outlet Defects" as listed earlier in
this chart.
Center Wall Deteriorated
Excessive operating temperature.
Check for restricted air intake.
Check engine for overfueling.
Check injection pump timing.
Continued on next page
RG,30,JW7581
1920NOV971/2
13-362
