Mainshaft AssembIy

TM 9-2520-246-34

NOTE

During installation. place rear bearing on

the mainshaft and aline the bearing with

the transmission opening. Use wooden

block and mallet to drive the bearing into

place.

i. Fourth- and Fifth-Sped Synchronizer. Firmly

apply downward pressure to the rear of the mainshaft

while sliding the fourth- and fifth-speed synchronizer

from the mainshaft. (See fig. 3-27.)

j. Mainshaft AssembIy. Hold the mainshaft in the

Figure 3-26. Removal of Mainshaft Rear Bearing.

rear position as illustrated in figure 3-28. and tilt the

front of the shaft upward. Slide the mainshaft from

1. Countershaft Rear Bearing. Hold the

the first and reverse gear, leaving the gear in the case.

countershaft gears in locked position by using a wood

wedge block between the gears and the transmission

NOTE

case. Remove the cotter pin from the countershaft

assembly, the retaining nut, and the washer. (See fig.

During installation, slide the mainshaft into

3-30.)

the first and reverse gear and through the

transmission case bearing opening.

Figure 3-27. Removal of Fourth- and Fifth-Speed

Figure 3-25. Removal of Input Shaft Bearing Cap.

Synchronizer.

NOTE

k. Idler Gear Assembly,. Screw adapter (item 3,

table 2-1) into idler gear shaft. Thread slide handle

puller into adapter and pull idler gear shaft from

When installing the retaining nut, tighten

housing. (See fig. 3-29.) Tilt idler gear.

to 120- 150 lb-ft torque.

NOTE

m. Countershaft. Slide the shaft rearward out of

the front bearing. Extend the shaft out of the front

During installation, insert the idler gear

bearing and extend the shaft through the rear bearing

shaft in the outer transmission case opening

bore. then remove the countershaft assembly from the

and through the idler gear assembly. Aline

transmission case. (See fig. 3-31.)

the shaft with the bracket opening and.

n. Countershaft Front Bearing. Using a soft drift

using a soft hammer. drive the shaft into

position. The indentation of the shaft must

pin and mallet, working from inside the transmission

be alined with the outer case housing and

case assembly, drive the front bearing retainer from

cutaway section of the countershaft rear

the transmission case. (See fig. 3-32.) Remove bearing

bearing cap.

from transmission case.

3-14