Main Drive Gear Assembly.

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) Set up 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 1/4 inch. Do not press second-speed

gear onto woodruff keys of mainshaft. Install the

puller on second and third speed synchronizer sleeve

Figure 3-34. Removal of Fourth-Speed Gear.

as shown in figure 3-37. Continue to remove

synchronizer sleeve from shaft and remove the two

woodruff keys, then remove second-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. 342.) 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,

Figure 3-33. Disassembly of Input Shaft Assembly.

and spring cup. (See fig. 346.) Slide the shifter shaft

lever through the shifter shaft cover.

c. Countershaf 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),.

Figure 3-35. Removal of Third-Speed Gear and Fourrh-

(1) Remove the interlock safety nuts and bolts.

Speed Gear Sleeve.

(See fig. 3-41.)

3-16