TM 10-4320-307-24
3-37
FLYWHEEL AND FLYWHEEL HOUSING INSPECT/REPLACE/ALlGN CONT).
g.
Check face alignment as follows:
(1)
Attach dial gauge attachment (1) to crankshaft
(2).
CAUTION
The tip of the gauge must not
enter the capscrew holes or
the gauge will be damaged.
(2)
Attach dial gauge (3) to attachment and put tip
of dial gauge (3) against flywheel housing
surface.
NOTE
The crankshaft must be pushed toward the
front
of
the
engine
to
remove
the
crankshaft end clearance each time a point
is measured.
(3)
Use accessory drive to rotate crankshaft until
dial indicator is at 12:00 o'clock position. Push
crankshaft toward front of engine. Adjust dial
on indicator until needle points to 0 (zero).
(4)
Rotate crankshaft and check alignment of face of flywheel housing at 3:00 o'clock, 6:00 o'clock, 9:00 o'clock,
and 12:00 o'clock positions.
(5)
Determine total indicator run out (TIR).
NOTE
The maximum allowable total indicator reading (TIR) depends on the diameter of the housing bore. See
specifications listed in step (i).
(6)
If alignment is not within specifications, remove housing. Check for nicks, burrs, or foreign material between
block and housing.
(7)
Check alignment again. If alignment is not within specifications, replace the housing.
h.
Position two rear engine mounts in position on engine and skid. Install capscrews and tighten.
i.
Remove lifting fixture used to support engine.
SAE
Bore Diameter
Bore Location Tolerance
No.
mm
in
mm
in
00
787.40 to 787.65
31.000 to 31.010
0.30
0.012 TIR
0
647.70 to 647.95
25.500 to 25.510
0.25
0.010 TIR
1/2
584.00 to 584.20
23.000 to 23.008
0.25
0.010 TIR
2
447.68 to 447.80
17.625 to 17.630
0.20
0.008 TIR
3
409.58 to 409.70
16.125 to 16.130
0.20
0.008 TIR
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