TM 5-3825-226-24FLYWHEEL HOUSING BORENOTE: Write the dial indicator measurements with theirpositive (+) and negative (-) notation (signs). Thisnotation is necessary for making the calculations in thechart correctly.1.With the dial indicator in position at (C), adjust the dial indicator to "0" (zero). Push the crankshaft up against thetop bearing. Write the measurement for bearing clearance on line 1 in column (C).2.Divide the measurement from Step 1 by 2. Write this number on line 1 in columns (B) & (D).3.Turn the crankshaft to put the dial indicator at (A). Adjustthe dial indicator to "0" (zero).4.Turn the crankshaft counterclockwise to put the dial indicator at (B). Write the measurement in the chart.5.Turn the crankshaft counterclockwise to put the dial indicator at (C). Write the measurement in the chart.6.Turn the crankshaft counterclockwise to put the dial indicator at (D). Write the measurement in the chart.7.Add lines I & II by columns.8.Subtract the smaller number from the larger number in line Ill in columns (B) & (D). The result is the horizontal "eccentricity" (out of round). Line III, column (C) is the vertical eccentricity.CHART FOR DIAL INDICATOR MEASUREMENTSPosition ofdial indicatorLineNo.ABCDCorrection for bearing clearanceI0Dial Indicator ReadingII0Total of Line 1 & 2III0•••••• Total Vertical eccentricity (out of round).•• Subtract the smaller No. from the larger No. The difference isthe total horizontal eccentricity.A10234X19.On the graph for total eccentricity find the point of intersection of the lines for vertical eccentricity and horizontal eccentricity.10. If the point of intersection is in the range marked "Acceptable" the bore is in alignment. If the point of intersection is in the range marked "Not Acceptable" the flywheel housing must be changed.1-31