PIPE AS 1764666 - Caterpillar

Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, 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.Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop Products Guide" for tools and supplies suitable to collect and contain fluids on Caterpillar products.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 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 housing
Inspection of the wastegateInspection of the Compressor Wheel and the Compressor Housing
Illustration 1 g00922408
Typical example of a turbocharger
(1) Compressor housing
(2) Compressor wheel
Remove the duct 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.
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). Replace the turbocharger if the compressor wheel rubs the compressor housing.
Inspect compressor wheel (2) and compressor housing (1) for oil leakage. An oil leak from the compressor wheel may deposit oil in the aftercooler (if equipped). Drain and clean the aftercooler if you find oil in the aftercooler.
Check the oil level in the crankcase. If the oil level is too high, adjust the oil level.
Inspect the air cleaner element for restriction and for damage. If a restriction or damage is found, correct the problem.
Inspect the engine crankcase breather. Clean the breather or replace the breather if the breather is plugged.
Remove the oil drain tube. Inspect the oil drain hole and the oil drain tube for oil sludge. If necessary, clean the oil drain hole, and the oil drain tube.
If Steps 4.a through 4.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
Illustration 2 g00922420
Typical example of a turbocharger
(1) Turbine housing
(2) Turbine wheel
Remove the ducts from the inlet and the outlet of the turbine housing.
Inspect turbine wheel (2) for damage by a foreign object. If there is damage, determine the source of the foreign object. Replace the turbocharger.
Turn the rotating assembly by hand. While you turn the assembly, push the assembly sideways. The assembly should turn freely. Turbine wheel (2) should not rub turbine housing (1). Replace the turbocharger if the turbine wheel