Drive Control Components

TM 10-3930-631-34

locate and describe the main components of the drive

control. Refer to figures 9-1 and 9-2 for further clarity

and interconnection of the components.

b. Forward and Reverse Control.

(1) The forward and reverse control is mounted

beneath the instrument panel. A shaft extending from

the top of the control is connected to the forward and

reverse control lever.

(2) The control lever has three positions F

(forward), N (neutral) and R (reverse). Movement of the

lever to F (forward) position sets the contact fingers in

the control to deliver current flow to the motor to drive

the truck forward.

(3) In N (neutral) the current flow is halted and

the drive motor cannot operate.

(4) In R (reverse) the contact fingers are set to

deliver current to the drive motor to rotate the differential

for reverse movement of the truck.

(5) When the drive motor is actuated the

hourmeter mounted on the instrument panel operates.

The meter records operating time of the truck.

c. Accelerator Control.

(1) The accelerator control (fig.

mounted below the instrument panel. A foot pedal or

accelerator is connected to the accelerator control

through a linkage.

Figure 9-2. Block diagram.

9-2. Drive Control Components

a. Description. The following paragraphs

9-3