TM 9-4940-568-34
5-61
f.
Flywheel Housing Bore Alignment Check.
NOTE
Perform Steps (1) through (18)
only if installing a new flywheel
housing.
(1)
Attach a dial indicator to crankshaft. The
dial indicator can be mounted by any
method that holds extension bar of the
indicator rigid so it does not sag. If bar sags
or indicator slips, the readings obtained will
not be accurate.
(2)
Position the dial indicator at the 6 oclock
position and zero the gauge.
(3)
Slowly rotate crankshaft. Record readings
obtained at 9 oclock, 12 oclock, and 3
oclock positions as (a), (b), and (c) in the
concentricity work sheet. Recheck zero at
the 6 oclock position.
(4)
The values for (a), (b), and (c) could be
positive or negative. Refer to
accompanying figure to determine the
correct sign when recording these values.
(5)
Remove lifting device from flywheel
housing.