TABLE 2- 1. TROUBLESHOOTING - TM-9-2990-205-34-P0029

TM 9- 2990- 205- 34&P

TROUBLESHOOTING INSTRUCTIONS - CONTINUED

0005 00

TABLE 2- 1. TROUBLESHOOTING

MALFUNCTION

PROBABLE CAUSE(S)

CORRECTIVE ACTION

1. Compressor wheel or turbine

a. Dirt build up behind

Disassemble and clean turbo. Refer

wheel does not turn freely when

compressor wheel, or dirt or

to WP 0008 00--1.

spun by hand.

carbon build--up behind

turbine wheel.

b. Foreign object damage, worn Disassemble turbo and replace worn

bearings or thrust surfaces,

or damaged parts. Refer to WP

or damaged compressor

0008 00--1.

wheel or turbine wheel.

2. Evidence of compressor wheel

Worn or damaged bearings or thrust

Disassemble the turbo and replace

rubbing.

rings, worn bore in bearing housing;

worn or damaged parts. Refer to WP

worn or bent shaft, or bent or

0008 00--1.

damaged compressor wheel.

3. Evidence of turbine wheel

Worn sleeve bearing, or bent or

Disassemble the turbo and replace

rubbing.

damaged turbine wheel, or worn bore worn or damaged parts. Refer to WP

0008 00--1.

in bearing housing; worn or bent

shaft.

4. Excessive radial movement.

Worn sleeve bearings, or worn shaft

Disassemble the turbo and replace

Refer to WP 0005 00--1.

and turbine wheel assembly, or worn

worn or damaged parts. Refer to WP

bore in bearing housing.

0008 00--1.

5. Excessive oil leaking into

Flinger sleeve metal seal ring worn or Disassemble the turbo and replace

compressor housing from

broken.

flinger sleeve metal seal ring. Refer

bearing housing.

to WP 0008 00--1.

6. Excessive oil leaking into the

Turbine wheel and shaft assembly

Disassemble the turbo and replace

turbine from the bearing housing. metal seal ring worn or broken.

metal seal ring. Refer to WP

0008 00--1.

7. End play greater than 0.006 inch. Worn thrust surfaces on thrust

Disassemble the turbo and replace

bearing and thrust rings.

worn or damaged parts. Refer to WP

0008 00--1.

8. End play less than 0.004 inch.

Dirt build--up behind turbine wheel or

Disassemble and clean turbo. Refer

dirt build--up behind compressor

to WP 0008 00--1.

wheel.

9. Turbo makes excessive noise.

Dirt build--up between bearings and

Disassemble and clean turbo.

housing.

Replace worn or damaged bearings.

Refer to WP 0008 00--1.

END OF WORK PACKAGE

0005 00-054 0-ank

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