Transmission Maintenance Instructions (Cont)
Measure inside diameter of bushing (1).
Check clearance between diameter of
main shaft bearing surface, measured in
paragraph 7-13, and bushing diameter
measured in step (3). Clearance must
not be greater than 0.004 in. (0.10 mm).
Inspect ends and outside diameter of the
governor support pin (2) for wear. If
worn, replace pin.
Some clutch assemblies contain paper friction plates.
When servicing clutch assembly, replace all paper
friction plates with graphite friction plates. Paper
friction plates and graphite friction plates cannot be
intermixed within the same clutch assembly. Refer to
TM 9-2320-279-24P for identification of parts.
Stack 13 clutch plates (1 and 2) on flat surface
of press, starting with steel plate (1) and
alternating with friction plate (2).
Place first clutch piston (3) on top of clutch
plates (1 and 2).
Press evenly on first clutch piston (3)
with 980 to 1020 lb load (4359 to
Measure distance from base of clutch
pack (4) to thrust pad (5).
Clutch pack thickness must be 2.521 to
2.553 in. (64.03 to 64.55 mm). Replace
clutch plates (1 and 2) as needed to
ensure proper clutch pack thickness.
Measure thickness of one tang (6) on
each of seven steel plates (1).
If steel plate measures 0.116 to
0.123 in. (2.95 to 3.12 mm), steel
plate is thick.
If steel plate measures 0.099 to 0.106 in. (2.51 to 2.70 mm), steel plate is thin.
Repeat steps (1) to (5) to recheck clutch pack thickness.
Remove first clutch piston (3) and clutch pack (4) from press.