TM-9-2815-202-34 Technical Manual for 8V71T Engines for M109 Howitzer Download
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TM9-2815-202-34 4-22. FLYWHEEL ASSEMBLY e. Testing (1) Flywheel face runout a. b. c. REPLACEMENT (Cont) Mount dial indicator (12) on flywheel housing (9) with dial indicator needle against clutch contact face. Pry flywheel toward engine block (at six o’clock position) to insure end play is in one direction, Adjust dial indicator to read zero at twelve o’clock position. CAUTION When using hexagon head bolt at front of crankshaft to turn crankshaft, always turn bolt clockwise. Serious engine damage may result if bolt becomes loose. d. Rotate crankshaft and record readings at 60 degree intervals (6 readings). Pry flywheel ● ● toward engine block before taking each reading. NOTE Runout is the maximum negative reading plus the maximum positive reading. For example, if maximum readings were 0.004 and -0.007 inch, then runout is 0.011 inch. Maximum allowable runout is 0.001 inch per inch of radius. Measure radius from center of flywheel to dial indicator needle (clutch contact face). For example if the radius is 12 inches, then the runout should be less than 0.012 inch. e. If flywheel face runout exceeds its maximum limit, remove flywheel and check for dirt or foreign material between crankshaft and flywheel. Remount flywheel. If readings are still out of limits, replace flywheel. 4-75