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 152 of 323

CHAP

5,

SEC

XI V

OUTPUT PRESSURE OIL PUMP REBUIL D

PAR

132-136

Section XIV. OUTPUT PRESSURE OIL PUMP—REBUILD

132. DESCRIPTIO N

Refer to par. 23 for the description of the

output pressure oil pump.

133. DISASSEMBLY (fig. 384, fold-out 13)

a.

Using

a

screwdriver,

remove

two

screws 15 retaining pump cover assembly 16.

b .

Remove cover assembly 16 .

c .

Do not remove needle bearing 17 o r

dowel pin 18 from cover assembly 16 unless

replacement is necessary. If necessary, drive

the bearing or dowel pin out of cover 19.

d . Remove oil pump drive gear 11 and

idler gear assembly 12.

e . Do not remove needle bearing 13 from

idler gear 14 unless replacement is necessary.

If necessary, press the bearing from the gear.

f . Remove idler gear shaft 10 and ball 9

from pump body 8.

g . Do not remove needle bearing 7 from

pump body 8, unless replacement is necessary.

If necessary, press the bearing from the body.

134. CLEANIN G

Refer to par. 71 for cleaning recommen-

dations.

135. INSPECTION AND REPAIR

Refer to par. 72 for general inspection

and repair recommendations. Repair and re-

build points of measurements for fits, clear-

ances and wear limits are indicated by small

letters in fig. 384, fold-out 13. Refer to par.

247 for wear limits information.

136. ASSEMBLY (fig. 384, fold-out 13)

a . If bearing 7 was removed from the

pump body, install a new replacement.

b . Pressing against the numbered side of

the bearing cage, install bearing, from the

outer side of the pump body, 0.060 to 0.100

inch below the surface adjacent to the bearing

bore .

c . If bearing 17 was removed from pump

cover 19, install a new replacement. Press-

ing against the numbered side of the bearing

cage, install the bearing, from the outer side

of

the

cover,

0.060

to

0.100

inch

below

the

surface adjacent to the bearing bore.

d . If dowel pin 18 was removed fro m

pump cover 19, install a new replacement.

Press pin in, from the inside of the cover,

leaving 0.220 inch of the pin protruding.

e . If bearing 13 was removed from pump

idler gear 14, install a new replacement .

Pressing against the numbered side of the

bearing cage, install the bearing 0.060 inch

below the side surface of the gear.

f . Using a light coat of oil-soluble grease,

place ball 9 onto pump idler gear shaft 10.

g . Indexing ball 9 on shaft 10, with the

slot in the shaft bore of the pump body 8, press

the shaft into the body until it is properly posi-

tioned.

h . Install idler gea assembly 12 onto

idler gear shaft 10.

i . Install pump drive gear 11 into pump

body 8.

j . Install pump cover assembly 16 an d

secure with two screws 15.

12 0