TURBOCHARGER – INSPECTION AND ANALYSIS COMPRESSOR WHEEL

CONDITION:
Compressor blade broken
CAUSE:
The blade either came in contact with a for­eign object (such as a screwdriver or wrench) or was fractured from careless handling.

RECOMMENDATION:
DO NOT REUSE:
Determine the cause of damage, observe han­dling procedures.
Caution – Always use the recommended inlet guard while performing any service operations to the turbocharger.

CONDITION:
Compressor wheel blades bent.
CAUSE:
Ingestion of soft material, such as rubber booting or shop towels.

RECOMMENDATION:
DO NOT REUSE:
Investigate the reason for the entrance of foreign material into the compressor inlet.
Caution – Always use the recommended inlet guard while performing any service operations to the turbocharger.

CONDITION:
Compressor wheel rubbing
CAUSE:
Worn shaft bearings or thrust washer.

RECOMMENDATION:
DO NOT REUSE:
Worn parts must be re­ placed and cause of wear eliminated.

CONDITION:
Compressor wheel spun on shaft
CAUSE:
Loose compressor wheel lock nut from improper assembly.

RECOMMENDATION:
DO NOT REUSE:
Review proper assembly technique as outlined in the service manual.
Note – Never reuse compressor wheel lock nuts.

CONDITION:
Compressor wheel dam­aged from foreign object CAUSE:
A foreign object entered the air intake system.
Some possibilities of entry are:
a) foreign object was left in the duct work.
b) foreign object was dropped in during assem­bly or disassembly.
c) foreign object broke loose from the air intake components.

RECOMMENDATION:
DO NOT REUSE:
Determine the cause of entry of foreign objects into the system. Deter­mine possible secondary damage to the engine components.

CONDITION:
Compressor wheel worn from dirt ingestion
CAUSE:
Air inlet system leaking, hole in air cleaner element or improper element.

RECOMMENDATION:
DO NOT REUSE:
A complete review of the application’s air intake system should be per­ formed. Air inlet adap­tors, duct work and air cleaners must be in­spected for the source of dirt entry.