CLEANING - TM-9-2320-269-34-10137

TM 9-2320-269-34-1

CRANKSHAFT AND MAIN BEARINGS - CONTINUED

ACTION

LOCATION

ITEM

REMARKS

CLEANING

NOTE

For more information on how to clean parts, go to General Maintenance Instructions (page 2-46).

WARNING

Solvent burns easily. Solvent fumes can explode. Do not smoke or allow open flame nearby when using

solvent. Failure to observe these precautions could cause serious injury or death.

20.

All metal parts

Clean in drycleaning solvent.

Wipe dry with clean, dry rags.

INSPECTION/REPLACEMENT

NOTE

For more information on how to inspect parts, go to General Maintenance Instructions (page 2-46).

Replace damaged or defective parts as needed.

CAUTION

Because of heat treatment, no attempt should be made to regrind journals for use of undersize bearings.

Grinding will cause tiny cracks at the fillet areas which will lead to crankshaft breakage and serious damage

to the engine.

21.

Crankshaft (1)

Look for cracks, scratches, nicks, and

score marks.

Look at keyway for cracks and wear.

Look at journals for discoloration

caused by overheating.

If crankshaft has been overheated,

heat treatment has been destroyed

and crankshaft must be replaced.

Using micrometer, measure journals.

Main journal diameter must be

3.1235 - 3.1245 inches (79.34 -

79.36 mm). Connecting rod

journals diameters must be 2.753 -

2.754 inches (69.93 - 69.95 mm).

2-120