TM 10-3930-641-34-1
FLYWHEEL HOUSING BORE SPECIFICATIONS
(Sheet 1 of 1)
NOTE: Write the dial indicator measurements with their positive (+) and
CHART FOR DIAL INDICATOR MEASUREMENTS
negative (-) notation (signs). This notation is necessary for making the
calculations in the chart correctly.
(1)
With the dial indicator in position at (C), adjust the dial indicator to "0"
(zero). Push the crankshaft up against the top 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) and (D).
(3)
Turn the crankshaft to put the dial indicator at (A). Adjust the 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).
(9)
On the graph for total eccentricity find the point of intersection of the
Write the measurement in the chart.
lines for vertical eccentricity and horizontal eccentricity.
(6)
Turn the crankshaft counterclockwise to put the dial indicator at (D).
(10)
If the point of intersection is in the range marked "Acceptable" the
Write the measurement in the chart.
bore is in alignment. If the point of intersection is in the range
(7)
Add lines I and II by columns.
marked "Not Acceptable" do Step 11.
(8)
Subtract the smaller number from the larger number in line III in
(11)
Loosen the bolts holding the flywheel housing to the cylinder block.
columns (B) and (D). The result is the horizontal "eccentricity" (out of
Hit the flywheel housing lightly with a hammer to put it in the correct
round). Line III, column (C) is the vertical eccentricity.
position. Tighten the bolts holding the flywheel housing to the
cylinder block and do Steps 1 through 10 again.
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