Figure 3-43. Hydraulic service brake system.

Section IV. SERVICE AND SEAT BRAKES

brake wheel AND SEAT BRAKES cylinders located

3-30. General

behind a dust shield in each of the drive wheels. The

a. A hydraulically operated, self-adjusting service

wheel cylinders are double end type. This type of cylinder

brake system is used in the lift truck to insure positive,

has activating links extending from each end of the

safe braking. (fig. 3-43.) The system consists of a

cylinder. These links transmit the movement from the

mechanically activated hydraulic master cylinder with

wheel cylinders to the brake shoes.

heavy duty brake lines transmitting hydraulic pressure to

Figure 3-43. Hydraulic service brake system.

b. The service brakes are self-adjusting through

expanding it. Link assemblies are attached to the brake

the use of a friction operated link assembly in each

shoes with roll pins. The pin mounting holes in the brake

wheel. The friction in the link assembly is great enough

shoes are 1/32 inch oversize to provide proper working

to prevent shoe return springs from collapsing the link,

clearance between shoe lining and brake drum.

but not enough to prevent pedal pressure from

3-63