FIGURE 4-32. Removing Piston Rings

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FIGURE 4-31. Connecting Rod and Piston Group

TM-55-1905-223-24-5 Bowthruster Engine for Landing Craft Utility (LCU) NSN 1905-01-154-1191 Manual

FIGURE 4-33. Counterweight Markings for Bearing Sizes

TM 55-1905-223-24-5

FIGURE 4-32. Removing Piston Rings.

Place a tag on the rings, and record the cylinder number of the piston on

the tag for future reference (if required).

Use internal snap ring pliers to remove the snap rings from both sides of the piston.

Put the piston rod assembly in a container of water.

WARNING

Use insulated gloves to prevent injury from boiling water or

heated piston.

Heat the piston in boiling water for 15 minutes.

CAUTION

Do not use a hammer to remove the piston pins. The piston can

distort and cause the piston to seize in the liner.

Remove the piston from the water, and use a blunt tool to push the piston

pin from the piston and rod assembly.

INSPECTION

Inspect the connecting rod bearings (11, FIGURE 4-31) .

(1)

Clean the bearings (11) with solvent.

(2)

Visually inspect the rods (1), the connecting rod bearing saddles, and

the machine bolts (10) for nicks, cracks, burrs, scratches, or fretting.

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