TM-9-2520-254-34
TRANSMISSION, AUTOMATIC, ALLISON, MODEL TX100-1
TECHNICAL MAUAL; DIRECT AND GENERAL SUPPORT MAINTENANCE MANUAL
OCTOBER 1971
TM-9-2520-254-34 - Page 53 of 126
(2) Inspect ball seats for wear and pitting.
Reseat by lapping with the proper size ball. On
seats where a nylon ball is used, a steel ball of the
same size may be used for lapping. Discard parts in
which the seats cannot be restored.
n. Spool-Type Valves.
(1) Inspect valves for wear, burs, scoring, and
evidence of sticking. Try valves in their bores. All
valves should move in their bores by their weight
alone. Do not force valves.
(2) Inspect edges of all valve lands. All edges
should be square and sharp. Do not destroy these
sharp edges in cleaning or repair operations. These
sharp edges help prevent the accumulation of
substances which might cause the valve to stick in
its bore.
(3) Remove burs with a soft honing stone.
Reclean valves if necessary to remove gum and dirt.
Discard all valves which have other defects.
o. Sheet Metal Parts.
(1) Inspect sheet metal parts for bends, cracks,
distortion, interference with adjacent parts, and
loose-welded points.
(2) Straighten bent parts. Weld cracks or loose
welds.
(3) Discard governor oil collector rings if any
damage is evident.
p. Installation of Teflon Seals and Expanders.
(1) Install expander into seal ring groove so
that its ends bend toward bottom of groove.
5-5
General
NOTE
Some expanders may require additional
bending to cause them to point toward the
bottom of the groove.
(2) While holding expander in groove, start
seal ring into groove at a point diametrically op-
posite expander ends. No lubrication is necessary
for installation.
(3) Install seal by hand. Tools or instruments
might damage seal. Do not stretch seal any more
than is necessary for installation.
(4) Center piston in piston bore when in-
stalling it, to prevent seal damage. Be extremely
careful to avoid scratching, nicking, or distorting a
Teflon seal.
WARNING
Do not destroy discarded Teflon seals by
burning; toxic gases are produced.
5-4. Repair and Overhaul and (Rebuild)
Standards
a. Clearances
and Wear Limits.
Refer to
paragraph 6-2 and 6-3 for data covering the sizes
and fits of new parts and wear limits information.
b. Torque Specifications.
Refer to table 6-1 for
general torque specifications for bolts, screws, and
nuts. Special torque specifications are given in the
text where applicable.
c.
Spring Specifications.
Refer to table 6-2 for
spring specifications.
Section II. DISASSEMBLY OF TRANSMISSION INTO SUBASSEMBLIES
a. Pictorial Steps.
This section is arranged in
consecutive pictorial steps, completely illustrating
the disassembly of the transmission. Directly
beneath each picture are simple disassembly in-
structions, keyed to the picture.
b. Transmission Component Groups. See
ap-
propriate exploded view of major component
groups
for parts
identification and assembly
sequence.
5-6. Disassembly Steps
Drain oil from transmission, if it was not drained
before transmission was removed from vehicle.
Refer to end item lubrication order to draining
procedures. See figure 5-1 through 5-52 for
disassembly steps.
NOTE
Refer to end item organizational manual
for instructions on removing the trans-
mission from the vehicle and separating
the transmission from the power pack.
Figure 5-1
(Step 1).
Attach lifting sling 4910-572-8614 (8356184) (A)
to transmission, using four
3
/
8
-16 x 1 bolts and plain
washers (B).
5-3
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