FIGURE 4-49. Main Bearing Cap Removal

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FIGURE 4-47. Main Bearing Side Bolt Removal.

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

FIGURE 4-51. Crankshaft Gear Removal.

TM 55-1905-223-24-1

FIGURE 4-49. Main Bearing Cap Removal

FIGURE 4-50. Crankshaft Removal/Installation

NOTE

Rotate the crankshaft, if necessary, to facilitate its removal.

Remove the upper main bearing shells and thrust rings. If bearing shell inspection is to be performed,

tape the upper and lower shells together or otherwise identify them as removed.

REPAIR

Clean all drilled oil passages in the crankshaft with a bistle-brush and solvent (as if cleaning a rifle

barrel).

If the crankshaft gear is chipped, cracked, broken or worn, replace the gear.

(1)

Install puller jaw and bridge assembly on crankshaft (FIG. 4-51).

(2)

Lubricate puller screw with clean engine lube oil.

CAUTION

Do not exceed 350 ft-lb (475 N ) of torque when turning the puller screw on

the puller jaw. The jaw will break.

(3)

Hold pry bar steady while turning puller screw with torque wrench until gear is loose.

(4)

Remove gear.

Inspect visually for scratches, nicks, cracks and obvious wear patterns and measure the crankshaft

journals. See Table 4-4 .

4-45