INSPECTION - TM-55-1905-219-14-40581

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CLEANING

TM-55-1905-219-14-4 Landing Craft Utility (LCU) 1667 Class Boston Hull Numbers 1667-1670 NSN 1905-00-168-5764 Manual

REASSEMBLY

TM 55-1905-219-14-4

3-40.1. PISTON - MAINTENANCE INSTRUCTIONS (Cont).

LOCATION

ITEM

ACTION

REMARKS

INSPECTION

Piston

If the tin-plate on the piston and the original grooves in the piston rings are intact, ti is

an indication of very little wear.

Examine the piston for score marks, cracks, damaged ring groove lands or indications

of overheating. A piston with light score marks which can be cleaned up may be

reused. Any piston that has been severely scored or overheated must be replaced.

Indications of overheating or burned spots on the piston may be the result of an

obstruction in the connecting rod oil passage.

Replace the piston if cracks are found across the internal struts. Use the magnetic

particle inspection method for locating cracks in the piston.

Cylinder

Inspect.

Check the cylinder liner

Refer to para-

liner

and block bore for exces-

and block

sive out-of-round, taper,

bore

or high spots which could

cause failure of the pis-

ton.

Connect-

Inspect.

Refer to para-

ing rod

and pis-

ton pin

3-828