TM-9-2815-202-34 Technical Manual for 8V71T Engines for M109 Howitzer Download
Page 263 of 670
TM 9-2815-202-34 (b) With crankshaft installed, place plastic gage strip (19) between crankshaft journal (20) and main bearing cap (7). Tighten main bearing bolts (21) to required torque. Remove main bearing bolts and cap and measure width of plastic gage with measuring strip (22). (3) Measure intermediate main bearing journal runout with dial indicator. Support crankshaft on its front and rear journals on V-blocks or an inverted engine block with front and rear upper bearing shells in place. When high spots of runout on adjacent journals are in opposite directions, sum must not exceed 0.003 inch total indicator reading. When high spots of runout on adjacent journals is in same direction, difference must not exceed 0.003 inch total indicator reading. When high spots of runout on adjacent journals are at right angles to each other, sum must not exceed 0.004 inch total indicator reading or 0.002 inch on each journal. If runout limit is greater than 0.002 inch on No. 2 and No. 4 journals or greater than 0.004 inch on No. 3 journal, crankshaft must be replaced. 4-157