INSPECTION - TM-5-1940-277-34

CRANKSHAFT INSPECTION AND REPLACEMENT INSTRUCTIONS (cont) - TM-5-1940-277-34_491

CRANKSHAFT INSPECTION AND REPLACEMENT INSTRUCTIONS (cont) - TM-5-1940-277-34_493

TM-5-1940-277-34 Boat Bridge Erection Twin Jet Aluminum Hull Model USCSBMK1 (1940-01-105-5728) Manual
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TM 5-1940-277-34 CRANKSHAFT INSPECTION AND REPLACEMENT INSTRUCTIONS (Continued) LOCATION ITEM ACTION REMARKS c. Remove. 4. Main bearing a. Intermediate Mark for iden- Assists in cor- caps (15, 16, 17 main bearing tification and rect reassembly. and 18) caps (16) position. b. 14 bolts Remove bolts and Use 7/8 in soc- (19), 7 main bearing caps in ket, 6 in exten- bearing caps turn. sion and ratchet. (15 thru 18) and 7 main bearings (20). c. Thrust Remove. washers (21) 5. Crankshaft (22) Crankshaft (22), a. Lift out of gear (23) and block. key (24) b. Remove gear Use gear puller. (23). c. Remove key (24). INSPECTION 6. Crankshaft (22) a. Center a. Inspect for: bearing jour- Grooving and nal thrust Discoloration. surfaces (25) b. Replace shaft Severe damage may if grooved or indicate a bent discolored. shaft. 3-61

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