OPERATING INSTRUCTIONS.

TM 10-3930-623-12

the brake lever slide plate slot is in the top half of the slot

NOTE

or the cables are loose over the pulleys (12) when the

Discoloration of wheel cylinder bore

brake is released, readjust cable length at upper end of

may be polished out with crocus

clevis.

cloth. Pits or scratches require use

of a hone.

NOTE

d. Installation. Reverse removal procedure and

If the knob cannot be rotated, grip the

install the power axle assembly. Refer to LO 10-3930-

lower knurled bank with pliers and

623-12 for lubrication requirements for the power axle

the upper band with second pair and

assembly. Bleed the service brake system (para 5-41).

unscrew top half of knob.

Make

e. Brake shoe adjustment. With front wheels

adjustment with lower nut and lock

raised from floor, turn front cam bolt until brakeshoe

with upper half.

drags on drum, then back off cam until wheel is just free

to turn. Repeat at rear cam bolt.

4-52. Foot pressure on either brake pedal moves a

plunger in the master cylinder to create hydraulic

4. Spring (18, fig. 4-6) to retain the shoes in place

pressure in the brake system.

This pressure is

and retract them from contact with the drum when the

transmitted through tubing and fittings (14) to each

brakes are released.

wheel cylinder to spread the brake shoes until they

contact the interior friction surface of the drums. The

5. A brake drum (4) to which the final drive axle and

friction, or drag, between the shoes and the drum,

wheel are bolted. The drum is the rotating part of the

brakes the front wheels, and slows or stops the truck.

assembly.

4-53. OPERATING INSTRUCTIONS.

6. Parking brake mechanism to spread the brake

shoes mechanically. This system is actuated by the

4-54. INSTRUMENTS AND CONTROLS. In addition to

hand brake lever, cables, and linkage.

the instruments and controls (switches) on the

instrument panel (see figure 1-12) the following controls

Removal. Refer to figure 4-6.2.

are provided for operation of the fork lift truck (see figure

4-7):

Release hand brake lever.

1. Engine choke control on the instrument panel at

2. Remove headed pin (26) and cotter pin (27)

the right of the driver's seat. Used principally when

connecting brake cable equalizer plate link (25) to lever

starting a cold engine.

assembly (29).

Steering wheel with the horn button in the center.

3. Remove screws (19) attaching brake lever

(29) to mounting bracket (18).

3. Hand brake lever. This control actuates, through

supplementary mechanical linkage, the service brake

Installation and Adjustment.

shoes at the wheels. The hand brake is primarily a

parking brake. If the truck's foot brake is pressed during

application of the parking brake, less effort will be

NOTE

required at the handle for a given degree of brake

Adjustment knob of brake lever

application.

should

turned

fully

counterclockwise before installing.

Accelerator pedal for controlling engine speed.

1. Install hand brake lever (29) to bracket (18)

with screws (19 and washers (18).

5. Double brake pedal. Pressure on either pedal

operates the inching valve and applies the brakes, as

2. Adjust knob of brake lever (29) until a hard

follows:

pull is required to pull the lever "over center". If pin in

4-8.1