TOPIC 3. SHIFTING MECHANISM

TM 10-3930-644-14&P

TOPIC 3. SHIFTING MECHANISM

The shifting mechanism, located on the steering column

shifting lever, (other than neutral) the control valve will

shaft, is made up of many parts (Figure 3-1), the primary

respond by pressuring the forward or reverse pistons in

purpose of which, is to provide a simple means of

the clutch pack assembly.

selecting the desired direction of travel.

NOTE

There are three positive, detented positions associated

The engine cannot be started unless

with the shifting lever; forward, neutral and reverse. The

the FORWARD-REVERSE lever is in

shifting lever is connected to the control valve assembly

its NEUTRAL position due to a safety

on the transmission through a shifting rod and

switch integral to the shifting

associated linkage. Depending on the position of the

mechanism.

A. REMOVAL

1. Remove floor and toe plates.

2. Remove shroud.

3. Remove cotter pin and washer from shift rod

and remove rod from shift lever. Unless service

of the shift rod is necessary, do not disconnect

shift rod from transmission. If necessary to

remove rod, refer to RETURN TO NEUTRAL

MECHANISM below.

4. Remove hardware from flanged bearing.

Loosen setscrew on collar. Lower selector lever

out of upper column bracket and remove from

truck.

5. Remove capscrews holding upper clamp to

bracket. Remove clamp.

6. Remove capscrews securing upper column

bracket to front bracket and remove upper

column bracket.

7. If it becomes necessary to remove the shift lever

proceed as follows:

a. Mark the position of the shift lever.

b. Loosen clamp screw at shift lever.

c. Slide shift lever, flanged bearing and collar

off bottom of shaft.

Figure 3-1. Forward-Reverse Lever Assembly

Figure 3-2. Shift Lever Dimension

2-56