CHAPTER 4 REPAIR OF TRANSMISSION, STEERING AND DRIVE COMPONENTS

CHAPTER 4

REPAIR OF TRANSMISSION, STEERING AND DRIVE COMPONENTS

Section I. REPAIR OF TRANSMISSION

4-1. General

of the converter, furnishes oil pressure to activate

the clutches. The pump also furnishes oil to the

The powershift transmission consists of three major

torque converter, the clutch plates and the front

components - a torque converter, a hydraulically

bearing of the forward drive shaft. The control

actuated clutch pack and a single speed constant

valve directs oil to the forward and reverse clutch

mesh transmission. See figure 4-1. Power from the

pistons, discs in the clutch pack. When the reverse

engine is delivered to the torque converter which in

clutch is activated, power is delivered to the

turn drives a pump and a clutch pack. Housed in

transmission through a hollow shaft which connects

the clutch drum are two double-faced clutch plates

the reverse gear and reverse clutch. If the forward

which, when activated, move the truck forward or

clutch is actuated, power is delivered to the

backward through splined hubs transmitting power

transmission through a solid shaft, which rotates

to the gear train. The torque converter furnishes

inside the hollow reverse shaft, connecting the

torque multiplication under load and serves as a

forward gear and forward clutch.

fluid coupling. The gear type oil pump, in the rear

Figure 4-1. Torque converter and transmission.

4-1