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TM 5-4320-305-24
3-7.
REPLACE/REPAIR FLYWHEEL (Continued)
WARNING
Operate acetylene torches properly and be alert for leaks on any
part of the equipment. Inhalation of acetylene produces headache,
dizziness, nausea, and possible loss of consciousness. If
acetylene is inhaled, seek fresh air immediately.
CAUTION
Ring gear damage may occur if gear is overheated. Do not heat
gear over 400° F (204°C). Use minimum amount of heat required to
fit ring gear on flywheel. Keep flame moving at all times.
3
Install replacement ring gear (1) on flywheel (2) as follows:
a. Support flywheel (2) (ring gear side up) on a solid flat surface.
b. Rest ring gear (1) on a flat metal surface.
NOTE
Heat-indicating crayons, which are placed on the ring gear and
melt at a predetermined temperature, may be obtained from most
vendors. Use of crayons will guard against overheating the gear.
c.
Heat ring gear (1) evenly with an acetylene torch to 400°F (204°C). Keep moving flame rapidly over surface of
gear.
d. Use tongs to position replacement gear in identical position to old gear.
e.
Tap gear in place against shoulder. If gear will not seat flatly on shoulder, remove it and carefully repeat the
heating operation.
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