Figure 1-3. Steering System.

TM 10-3930-627-12

c. Transmission. This is a constant mesh,

d. Drive Axle. The drive (front) axle is a double

power shifted unit with forward, reverse, and neutral shift

reduction heavy duty industrial unit, fitted with dual

positions available. Engine output is sent through a

wheels to support the weight of the truck plus load. The

torque converter to the transmission, which delivers it to

wheels of this axle are fitted with self- adjusting hydraulic

the front, or drive axle. Since all transmission gears are

brakes.

e. Steering Axle (fig. 1-3). The rear axle is

in constant mesh, they are coupled, when drive is

needed, by hydraulic application of internal clutches.

steerable, for greatest maneuverability in limited working

Operation of the shift lever on the steering column works

space.

Steering geometry is neutral; there is no

a selector valve on the transmission which applies and

tendency for the wheels to return to straight ahead

releases the drive clutches needed for forward or reverse

position when the steering wheel is released. A Saginaw

travel. In neutral the valve simply dumps all pressure.

power steering gear operates the steering axle.

Since the transmission fluid may get quite hot when

working hard, it is circulated through a cooler on the

truck radiator.

Figure 1-3. Steering System.

f. Mast (fig. 1-4). This is the load handling

The entire mast as a unit can be tilted forward when

slipping the forks under a load, then tilted back to cradle

system of the truck. Two forks are attached to a carriage

the load when hoisting or traveling. A two-handled

which is raised by a hydraulic cylinder. Two channel iron

control valve at the right of the driver's seat controls lift,

upright members guide the carriage in its travel, the

and tilting of the mast.

channels acting as guide rails for rollers on the carriage.

1-5