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TM 10-3930-634-34
S e c t i o n Ill. HYDRAULIC BRAKE SYSTEM
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

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