TM-9-2520-234-35

POWER TRAIN ASSEMBLY; ALLISON MODEL XTG411-2A

TECHNICAL MANUAL; FIELD AND DEPOT MAINTENANCE MANUAL

JULY 1962

TM-9-2520-234-35 - Page 109 of 323

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PAR

72-7 3

DISASSEMBL Y

CHAP

5,

SEC

I I

(2) Inspect the edges of all valve lands.

All edges should be square and sharp. Do not

destroy these sharp edges in cleaning or re-

pair operations. The 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 or

dirt deposits.

Discard defective valves.

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 ring

if any damage is evident.

p . Threaded Insert s

(1) Inspect insert for

aged threads and burs.

stripped or dam-

(2) If necessary to remove an insert,

the bolt which was removed from the insert

can be used with a nut of the same size.

(3) Grind a shoulder on one end of the

nut wide enough to allow the nut to seat against

the insert and not contact the adjacent mount-

ing surface.

(4) Thread the nut onto the bolt, shoul-

der side of the nut away from the bolt head,

and install the bolt into the insert to be re-

moved.

(5) Lock the bolt to the insert by tighten-

ing the nut against the insert. Turn the bolt

to remove the insert.

q . Dowel Pin s

(1) Inspect pins for excessive wear ,

bending or burs.

(2) Remove burs and minor surface ir-

regularities with crocus cloth or a soft honing

stone. Discard pins with other defects.

(3) To remove a dowel pin, drill and

tap a hole in the dowel to be removed.

(4) Obtain a sleeve which will extend

about an inch above the top of the dowel when

the

sleeve

is

placed

over

the

dowel.

The

sleeve must have square ends and the inside

diameter of the sleeve must be slightly larger

than the outside diameter of the dowel pin.

(5) Place the sleeve over the dowel to

be removed and install a washer on the sleeve.

(6) Using a bolt and nut the same size

as the threaded hole in the dowel, install the

nut on the bolt and thread the bolt into the

dowel pin.

(7) Hold the bolt and turn the nut against

the washer to remove the dowel.

Section II.

DISASSEMBLY OF POWER TRAIN INTO SUBASSEMBLIES

73. GENERAL ,

a.

This

section

presents

the

complete

disassembly of the XTG-411-2A transmission,

input transfer assembly and output drive as-

semblies. The disassembly procedures are

presented in pictorial step-by-step illustra-

tions. Directly beneath each picture ar e

simple disassembly instructions, keyed to the

pictures by letter callouts.

b . Refer to figs. 373 through 386 (fold-

outs 2 through 15 in back of manual) for parts

identification and location.

c . Drain the transmission oil.

Refer to

TM 9-2300-216-10 for draining procedures

7 7