Repair Connecting Rod and Piston Group - TM-55-1905-223-24-10340

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Check gear for cracks - continued

TM-55-1905-223-24-1 Main Propulsion Engine for Landing Craft Utility (LCU) NSN 1905-01-154-1191 Manual

FIGURE 4-66. Connecting Rod Disassembly.

TM 55-1905-223-24-1

4-16.

Repair Connecting Rod and Piston Group

This task covers:

Repair

INITIAL SETUP :

Tools

Equipment Condition

Rod/Piston assemblies removed

Tool kit, general mechanics rail

from engine, pistons removed

and marine diesel engines,

Piston ring expander P/N ST-1269

Machinist measuring tool set

Magnaglo tester P/N H620

Materials/Parts

Connecting rod assembly P/N 3043910

Compression ring P/N 3046227

Piston P/N 3801436

Emery cloth, Item 18, Appendix C

Piston ring set P/N AR-10680

Cleaning solvent, Item 15, Appendix C

REPAIR

Connecting Rods.

CAUTION

The number on the connecting rod must be the same as the number on the rod cap. Never

assemble a new cap to an old rod or an old cap to a new rod.

(1)

Remove capscrews (3, FIG. 4-66), washers (4) and cap (2) from connecting rod (1).

(2)

Use solvent to clean the parts.

(3)

Inspect rod and cap for fretting damage. The rod and cap must be replaced as an assembly if

fretting damage is visible on either piece.

(4)

Check the threads of the connecting rod capscrews for damage. Check the

capscrew head for ,cracks.

Change 1

4-69