FIGURE 4-71. Oil Ring Expander.

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FIGURE 4-70. Piston Measurement.

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

Repair Flywheel Housing

TM 55-1905-223-24-1

CAUTION

The gap in the oil ring expander (4, FIG. 4-71) must be turned 180 degrees opposite the gap on

the oil ring (3) or the rings and piston will be damaged.

Do not align the gap of a ring (1, 2, 3) with a piston pin bore (6) or the ring will break and

damage the piston and cylinder liner.

NOTE

The piston rings are marked with the part number. The shipping package is marked with the

location. The part number on the ring must be positioned toward the top of the piston.

(12) Use piston ring expander (7). Install rings (1, 2, 3, 4) on piston (5).

(13) Rotate rings so gaps are not aligned with an adjacent ring or the piston pin bore (6).

FIGURE 4-71. Oil Ring Expander.

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