TM 5-3895-383-24
NOTE:
Write the dial indicator measurements with their
positive (+) and negative (-) notation (signs). This
notation is necessary for making the calculations
in the chart correctly.
1.
Fasten the dial indicator to the flywheel so the anvil of
the indicator will touch the flywheel housing bore. 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) & (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). 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 and II by columns.
8.
Subtract the smaller number from the larger number in
line III in columns (B) & (D). The result is the horizontal
eccentricity" (out of round). Line III, column (C) is the
vertical eccentricity.
Graph For Total Eccentricity.
(1) Total Vertical Eccentricity [mm (in)]. (2) Total Horizontal
Eccentricity [mm (in)]. (3) Acceptable. (4) Not Acceptable.
9.
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.
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