broken teeth on the ring gear, distortion, worn or out-of-
one revolution. If the flywheel is eccentric more than
round bolt holes, and other damage. If the ring gear is
0.008 inch, loosen and TM 10-3930432-34 retighten the
damaged, replace as follows:
flywheel mounting bolts and recheck eccentricity. If
(1) Cut the ring gear with a torch or hack saw
eccentricity still exceeds 0.008 inch, replace the flywheel.
and remove the ring gear from the flywheel 127).
When cutting the ring gear, be extremely careful
not to damage the flywheel.
(2) Heat the replacement ring gear in an oven
and cool the flywheel in water or in a refrigerator.
(3) Position the replacement ring gear on the
flywheel. As the ring gear and flywheel approach the
same temperature, the ring gear will contact to a tight fit
on the flywheel.
Position the flywheel housing (35) on the
engine block. Secure with screws (29 and 32, fig. 9-26)
and washers (30 and 33).
Position the flywheel (27, fig. 9-20) on the
crankshaft (26); secure with six bolts (23), lockwashers
(25), and nuts (24). Tighten the nuts to 35 to 40 ft/lbs
Check flywheel runout by mounting a dial
indicator (fig. 9-21) and rotating the crankshaft through
one full revolution. Hold pressure against the flywheel to
Figure 9-22. Checking Flywheel Eccentricity.
eliminate crankshaft end play. If flywheel runout exceeds
0.008 inch, remove the flywheel and clean the crankshaft
Check runout of the flywheel housing face by
flange and flywheel seat. Install the flywheel and
mounting a dial indicator (fig. 9-23) and rotating the
recheck runout. If runout still exceeds 0.008 inch,
crankshaft through one revolution.
replace the flywheel.
against the flywheel to eliminate end play. If runout
exceeds 0.008 inch, clean the mounting surfaces of the
flywheel housing and the block. Recheck flywheel
housing runout. If the runout is still not within limits,
replace the flywheel housing.
Figure 9-21. Checking Flywheel Runout.
Check flywheel eccentricity by mounting a dial
Figure 9-23. Checking Flywheel Housing Runout.
indicator (fig. 9-22) and rotating the crankshaft through