TM-9-2520-246-34
TRANSMISSION MODEL 3052, NSN 2520-00-347-4520
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT; MAINTENANCE MANUAL
MAY 1978
TM-9-2520-246-34 - Page 51 of 153
TM 9-2520-246-34
b. Main Drive Gear Assembly.
(1) Remove the snapring and fourth-speed gear
thrust washer from mainshaft assembly. (See fig. 3-
34.) Slide the fourth-speed gear from the mainshaft.
(2) Setup fixture as shown in figure 3-35. Apply
pressure from the press ram and remove fourth-speed
gear sleeve and third-speed gear.
(3) Slide second- and third-speed synchronizer
free of mainshaft. Using a pair of pliers, remove the
snapring which holds the second-speed synchronizer
sleeve in position. Set up press as shown in figure 3-
36. Press second- and third-speed synchronizer sleeve
approximately ¼ inch. Do not press second-speed
gear onto woodruff keys of mainshaft. Install the
puller on second and third speed synchronizer sleeve
as shown in figure 3-37. Continue to remove
synchronizer sleeve from shaft and remove the two
woodruff keys, then remove second-speed gear.
Figure 3-33. Disassembly of Input Shaft Assembly.
c. Countershaft Assembly.
(1) Using a pair of pliers, remove snapring.
Position countershaft on press as shown in figure 3-
38. Install a puller adapter under the drive gear and
press the shaft from the gear. Remove woodruff key.
(2) Place into press as shown in figure 3-39.
Remove fourth-speed gear snapring and press the
shaft. Then remove fourth-speed woodruff key.
d. Mainshaft Rear Bearing Cap.
Using a round
suitable block, drive the oil seal from the bearing cap.
(See fig. 3-40.)
e. Shifter Shaft Cover Assembly.
(1) Remove the interlock safety nuts and bolts.
(See fig. 3-41.)
Figure 3-34. Removal of Fourth-Speed Gear.
(2) Using a punch and hammer, remove the
expansion plugs. Clip the safety wire and loosen the
four setscrews holding the shift forks and actuating
lug in position. (See fig. 3-42.) Then remove the three
shifter shafts.
(3) Turn the shifter cover right side up and
remove the poppet balls and springs. (See fig. 3-43.)
(4) Pry the interlock plate up and remove the
interlock plate, springs, and interlock plate spring
washers. (See fig. 3-44.)
(5) Drive first and reverse shifter shaft oil seal
(fig. 3-45) out with punch and hammer, and discard
seal.
(6) Remove the lower shift lever, lockring, spring,
and spring cup. (See fig. 3-46.) Slide the shifter shaft
lever through the shifter shaft cover.
Figure 3-35. Removal of Third-Speed Gear and Fourth-
Speed Gear Sleeve.
3-16
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