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 TM 55-1905-223-24-5
(c)
Use the accessory drive shaft to rotate the crankshaft one complete revolution.
Measure the
flywheel runout at four equal points on the flywheel.
NOTE
The flywheel must be pushed toward the front of the engine to remove the
crankshaft end clearance each time a point is measured.
(d) The total indicator reading (TIR) of the flywheel face must not exceed the following specifications:
Flywheel
Maximum (TIR)
Radius (A)
of Flywheel Face
mm
in
mm
in
203
8
0.203
0.008
254
10
0.254
0.010
305
12
0.305
0.012
356
14
0.356
0.014
406
16
0.406
0.016
(e) If the flywheel face runout is not within specifications, remove the flywheel. Check for nicks, burrs, or
foreign material between the flywheel mounting surface and the crankshaft flange.
1 Repair or replace as necessary.
2 Measure the face runout again.
d. Install the magnetic pickup in the flywheel housing as follows:
NOTE
The pickup hole is perpendicular to the flywheel gear teeth.
(1) Make sure a gear tooth is centered in the pickup hole. If necessary, rotate the flywheel to center a
tooth in the hole.
(2) Screw the magnetic coil (13, FIGURE 3-80) pickup all of the way down until it contacts the flywheel
gear tooth. The pickup will screw in very easily; do not use excessive pressure to install the pickup.
3-139
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