TOPIC 3. OPERATING CONTROLS

TM 10-3930-644-14&P

TOPIC 3. OPERATING CONTROLS

All operators should learn the locations and functions of

C. LIFT AND TILT CONTROLS

the various instruments and controls before attempting

to operate the vehicle. See figure 3-1 for location of the

The lift, tilt, and accessory controls are located to the

controls described in this Topic.

right of the operator (Fig 3-1).

A. STEERING WHEEL

D. PARKING BRAKE LEVER

The steering wheel is operated in the conventional

The parking brake lever (Fig 3-1) is cam-action, over-

manner, that is, when the wheel is turned right the truck

center type, located on the instrument panel at the left

will turn to the right; when the wheel is turned left, the

side of the operator's compartment. It actuates an

truck will turn to the left. The steer wheels are located at

enclosed, dual-shoe mechanical unit attached to the

the rear of the truck. These cause the rear of the truck

brake drum flange. The hand grip on the handle permits

to swing out when a turn is made. With a little practice,

adjustment to compensate for brake lining wear.

this type steering is easily mastered.

E. INCHING CONTROL - "POWER SHIFT"

B. FORWARD/REVERSE LEVER POWER SHIFT

The inching pedal is located at the lower left of the

The power shift lever is located on the steering column

steering gear mounting support. A change in pedal

and beneath the steering wheel.

There are three

stroke varies oil pressure in the clutch so truck can be

positions - forward, neutral, and reverse (Fig 4-1). The

"inched" along slowly while the engine is operated at

lever actuates a hydraulic valve mounted on top of the

high speed for fast lifts. The farther the pedal is

transmission; this directs the flow of oil to actuate

depressed, the slower the truck travels.

In fully

forward or reverse clutches.

depressed position, the clutch is completely disengaged

and the service brakes are applied.

NOTE

F. BRAKE PEDAL

On Power Shift models a safety

switch Incorporated in the shifting

The brake pedal, located to the right of the steering

mechanism prevents engine startup

column, operates the brake master

with transmission in gear.

Figure 3-1. Controls and Instruments

1-4