ENGINE AR-COMPLETE 4270276 - Caterpillar

Introduction
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 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 wheel and the compressor housing
Inspection of the turbine wheel and the turbine housingRequired Tools
Table 1
Tools Needed
Part Number Part Name Qty
6V-3075 Dial Indicator 1 Check Procedure
Inspection of the Compressor Wheel and the Compressor Housing
Illustration 1 g00922408
Typical example of a turbocharger
(1) Compressor housing
(2) Compressor wheel
Remove the air cleaner from the compressor inlet.
Inspect compressor wheel (2) for damage from a foreign object. If there is damage, determine the source of the foreign object. As required, clean the inlet system and repair the intake system. Replace the turbocharger. If there is no damage, go to Step 3.
Clean compressor wheel (2) and compressor housing (1) if you find buildup of foreign material. If there is no buildup of foreign material, go to Step 4.
Turn the rotating assembly by hand. While you turn the assembly, push the assembly sideways. The assembly should turn freely. Compressor wheel (2) should not rub compressor housing (1). The turbocharger must be replaced if the compressor wheel rubs the compressor housing. If there is no rubbing