TM-9-2815-202-34 Technical Manual for 8V71T Engines for M109 Howitzer Download
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TM 9-2815-202-34 (4) CAUTION Install main bearing caps and main bearing shells in their original position. Main bearing caps are numbered 1,2,3,4, and 5. Upper bearing shell has an oil hole and groove for lubrication, and lower bearing shell is smooth with no groove or oil hole. (5) (6) Remove five main bearing caps (7) from cylinder block. Attach lower shell of main bearings (8) and lower thrust washers (9) (rear cap only) to appropriate cap. WARNING If hoist and sling are not available, use two or more men to remove crankshaft. Crankshaft Is heavy and awkward to handle. Serious injury can result If crankshaft Is dropped. Remove crankshaft from cylinder block. Do not dislodge upper bearing shells (10) and upper thrust washers (11). Remove five upper bearing shells (10) and two upper thrust washers (11) from block and mark with corresponding main bearing identification number. b. Disassembly (1) (2) (3) Remove six bolts (12) from rear crankshaft gear (13). Use universal puller to remove gear from crankshaft (14). Remove slip fit oil pump driving gear (15) from front of crankshaft. Remove Woodruff key (16) and spacer ring (17) from crankshaft. 4-153