TM 5-4320-300-14
6-11. CRANKSHAFT AND FLYWHEEL (CONT))
Location/Item
Action
Remarks
c. Heat the gear evenly with an acetylene
Heat indicating
torch. Keep moving flame rapidly over
crayons, which
surface of gear.
are placed on the
ring gear and
melt at a pre-
determined tem-
perature, may be
obtained from
most vendors. Use
of crayons will en-
sure against over-
heating the 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.
29. Crankshaft
Inspect butt end of the crankshaft and flywheel
and flywheel
contact surface. Lightly stone crankshaft end
contact
and flywheel contact surface to remove any
surfaces
fretting or brinnelling. Remove dirt and debris
from contact surfaces.
REPAIR
CAUTION
Crankshaft damage may occur if grinding wheel coolant is not used, or
wheel is crowded into work. During grinding, feed wheel into work slowly
and use coolant generously.
30. Crankshaft
If one or more main or connecting rod
bearing
journals require grinding, then grind all
journals
main journals or all connecting rod
journals to the same required size.
31. Journal
All journal fillets must have a 0.130 to
fillets
0.160 inch (3.302 to 4.064 mm) radius be-
tween crank cheek and journal and must not
have any sharp grind marks. Fillet must
blend smoothly into journal and crank cheek
and must be free of scratches. Check radius
with a fillet gage.
6-102
