CRANKSHAFT BEARINGS - MAINTENANCE INSTRUCTIONS (Continued).

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INSTALLATION (Cont)

TM-55-1905-219-14-7 Landing Craft Utility (LCU) 1667 Class Boston Hull Numbers 1667-1670 NSN 1905-00-168-5764 Manual

REMOVAL

TM 55-1905-219-14-7

3-172.1. CRANKSHAFT BEARINGS - MAINTENANCE INSTRUCTIONS (Continued).

a. The crankshaft is one-piece steel forging, heat-treated to ensure strength and durability. The main and connecting

rod bearing journal surfaces and fillers on all crankshafts are induction hardened.

b. Complete static and dynamic balance of the crankshaft has been achieved by counterweights incorporated into the

crankshaft.

c. The crankshaft end play is controlled by thrust washers located at the rear main bearing cap of the engine. Full

pressure lubrication to all connecting rod and main bearings is provided by drilled passages within the crankshaft and

cylinder block.

d. Two dowels and six tapped holes are provided in the rear end of the crankshaft for locating and attaching the

flywheel. One hole is unequally spaced so that the flywheel can be attached in only one position.

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