TM-9-2815-202-34 Technical Manual for 8V71T Engines for M109 Howitzer Download
Page 265 of 670
TM 9-2815-202-34 g. Installation CAUTION When a new or rearound crankshaft is installed, all new main and connecting rod bearing shells and-thrust washers must be installed. If used components are-installed, short life will result. (1) Install upper main bearing shells (10) in block. If bearings are being reused, install them in same locations from which they were removed. (2) Apply clean engine oil to upper bearing shells and crankshaft main bearing journals. CAUTION Do not damage journals or main bearing shells when lowering crankshaft into position. Damage will result in short component life. (3) (4) Position crankshaft on upper bearing shells in cylinder block using Iifting sling (23). Install upper crankshaft thrust washers (11) on each side of rear main bearing support with grooved side of thrust washers toward crankshaft thrust surfaces. NOTE Install used bearings in same bearing caps from which removed. (5) Install lower main bearing shells (8) in bearing caps (7) and two thrust washers (9) to rear main bearing cap. NOTE Main bearing caps are bored in position and stamped 1, 2, 3, 4, and 5, Install caps with identification stamp on right side of engine. (6) Install five main bearing caps (7) along with mating lower bearing shells (8) and lower thrust washers (9). 4-159