Disassembly and Assembly of Subassemblies.

TM 9-2520-246-34

37.) Place support bars beneath the high-speed gear,

and press idler shaft high-speed gear and rear bearing

from the shaft. Remove high-speed gear woodruff key.

(3) Place the idler shaft assembly in an arbor

press with low-speed gear and front bearing up. (See

fig. 4-37.) Place support bars beneath the low-speed

gear. Press idler shaft low-speed gear and front

bearing from the idler shaft. Remove the low-speed

gear woodruff key from the idler shaft.

Figure 4-36. Rear Output Shaft Disassembly --

Exploded View.

4-23. Disassembly and Assembly of

Subassemblies.

a. Rear Output Shaft Assembly.

NOTE

Before pressing the gear and bearings on

the rear shaft, coat the shaft with white

lead pigment, Fed Spec TT-W-261C. When

assembling the rear output shaft assembly,

install parts separately so as not to damage

the front and rear bearings.

(1) Place rear output shaft assembly in an arbor

press with front tapered roller bearing cone (fig. 4-36)

Figure 4-37. Idler Shaft Disassembly --

up. Place support bars beneath the cone. Press the

Exploded View.

cone from the shaft.

c. Input Shaft Assembly.

(2) Place the rear output shaft assembly in an

NOTE

arbor press with the rear output shaft gear up. (See

fig. 4-36.) Place support bars beneath the rear output

Visually inspect synchronizer for broken,

shaft gear and press the gear free of the shaft.

nicked, or worn gear teeth. If any of these

Removal of the rear output shaft gear in this manner

conditions prevail, the synchronizer must

will also push the rear output shaft rear bearing from

be replaced. For replacement, use

the shaft. Remove the woodruff key from the shaft.

synchronizer part number 7346755.

b. Idler Shaft Assembly.

NOTE

Before pressing the bearing into the gears,

and the gears on the input shaft, coat all

Before pressing the gears and bearings on

installation surfaces with white lead

the idler shaft, coat the shaft with white

pigment, Fed Spec TT-W-261C.

lead pigment, Fed Spec TT-W-261C. When

assembling the idler shaft assembly, install

(1) Remove the shifter shaft fork from the

parts separately so as not to damage front

synchronizer assembly. (See fig. 4-38.)

and rear bearings. Discard the old capscrew

locking plate and replace it with a new one.

(2) Remove the input shaft rear bearing snapring

from the end of the input shaft. (See fig. 4-38.) Place

(1) Using a suitable tool, bend the rear bearing

the input shaft assembly in an arbor press with the

and gear locking plate ears away from capscrews and

rear bearing and high-speed gear up. Install a suitable

remove the two capscrews, locking plate, and the rear

puller around the input shaft high-speed gear and

bearing gear-lock. (See fig. 4-37.)

press the high-speed gear free from the shaft. Removal

of high-speed gear in this manner will push the gear

(2) Place the idler shaft assembly in a press with

bearing spacer; gear bearing, thrust washer, and rear

the high speed gear and rear bearing up. (See fig. 4-

bearing from the input shaft.

4-25