S e c t i o n Ill. HYDRAULIC BRAKE SYSTEM

TM 10-3930-634-34

5-9. General

supply tank. Pressure is provided by an engine-driven

This section contains information on the maintenance

pump and application is controlled by an applicator

of the hydraulic brake system. This includes the brake

valve. An accumulator is incorporated in the brake sys-

assembly, brake adjuster, brake valve, the accumu-

tem to provide operating pressure when the engine has

lator, and engine-driven pump.

stopped.

CAUTION

5-10. Brake Assembly

Check the lining frequently for wear. To

a. General. The brake assembly on the rough terrain

check wear, apply the brakes and look into

forklift is of the expander tube brake, 360 segment-

the spring openings in the brake frames. If

ed, shoe type. Its components include a cast torque

the brake shoe tends to shear the spring at a

plate upon which the expander tube is mounted, and

point between the frame and the shoe (ap-

proximately 1/8-inch space between the top of

an inlet connection into which the nozzle of the ex-

pander tube is inserted. Steel side frames with welded

spring opening and the ledge of the shoe upon

steel torque bars are attached to both sides of the

which spring rests), travel is at a maximum.

torque plate. Brake linings mounted on steel shoes are

Replace the linings and springs before this

inserted between the torque bars and side frames and

condition is reached. Continued operation in

held in position by retracting springs. Steel shields are

this condition will damage the brake struc-

used to bridge the gap between shoes and protect the

ture.

expander tube. The springs inserted under the center

b. Removal.

of the linings and over the steel break shoes withdraw

(1) Remove wheel (TM 10-3930-634-12).

the block and shoe assemblies from the surface of the

(2) Refer to figure 5-5 (57, 58, 61, and 62) and re-

brake drum after the actuation pressure has been re-

move the brake assembly in numerical sequence.

leased. This brake system receives its oil supply

c. Disassembly. Refer to figure 5-7 and disassemble

the brake assembly as follows:

(OE/HDO-10), from the forklift's main hydraulic oil

5-13