Turbocharger - Inspect

TM 9-2320-312-24-2

Testing and Adjusting Section

If the back pressure exceeds 14.9 kPa

Before you begin inspection of the turbocharger,

(60 inch of H2O), replace the catalytic

be sure that the inlet air restriction is within the

specifications for your engine. Be sure that the

converter/muffler.

exhaust system restriction is within the specifications

for your engine. Refer to Systems Operation/Testing

i01388605

and Adjusting, "Air Inlet and Exhaust System -

Turbocharger - Inspect

Inspect".

The condition of the turbocharger will have definite

SMCS Code: 1052-040

effects on engine performance. Use the following

inspections and procedures to determine the

condition of the turbocharger.

Disconnect batteries before performance of any

Inspection of the Compressor and the Compressor

service work.

Housing

Inspection of the Turbine Wheel and the Turbine

Housing

Hot engine components can cause injury from

Inspection of the Wastegate

burns. Before performing maintenance on the

engine, allow the engine and the components to

Inspection of the Compressor and

cool.

the Compressor Housing

Remove air piping from the compressor inlet.

Personal injury can result from rotating and mov-

1. Inspect the compressor wheel for damage from a

ing parts.

foreign object. If there is damage, determine the

source of the foreign object. As required, clean

Stay clear of all rotating and moving parts.

the inlet system and repair the intake system.

Replace the turbocharger. If there is no damage,

Never attempt adjustments while the machine is

go to Step 3.

moving or the engine is running unless otherwise

specified.

2. Clean the compressor wheel and clean the

compressor housing if you find buildup of foreign

The machine must be parked on a level surface

material. If there is no buildup of foreign material,

and the engine stopped.

go to Step 3.

3. Turn the rotating assembly by hand. While you

NOTICE

turn the assembly, push the assembly sideways .

Keep all parts clean from contaminants.

The assembly should turn freely. The compressor

wheel should not rub the compressor housing.

Contaminants may cause rapid wear and shortened

Replace the turbocharger if the compressor

component life.

wheel rubs the compressor wheel housing. If

there is no rubbing or scraping, go to Step 4.

NOTICE

4. Inspect the compressor and the compressor

Care must be taken to ensure that fluids are contained

wheel housing for oil leakage. An oil leak from

during performance of inspection, maintenance, test-

the compressor may deposit oil in the aftercooler.

ing, adjusting and repair of the product. Be prepared to

Drain and clean the aftercooler if you find oil in

collect the fluid with suitable containers before open-

the aftercooler.

ing any compartment or disassembling any compo-

nent containing fluids.

a. Check the oil level in the crankcase. If the oil

level is too high, adjust the oil level.

Refer to Special Publication, NENG2500, "Caterpillar

Tools and Shop Products Guide" for tools and supplies

b. Inspect the air cleaner element for restriction.

suitable to collect and contain fluids on Caterpillar

If restriction is found, correct the problem.

products.

c. Inspect the engine crankcase breather. Clean

Dispose of all fluids according to local regulations and

the engine crankcase breather or replace

mandates.

the engine crankcase breather if the engine

crankcase breather is plugged.