Specifications

Vehicle System System Operation 35
Oil Cooled Disc Brake
Disc Brake Assembly
(1) Inlet (from brake valve). (2) Passage. (3) Plates (five).
(4) Discs (four). (5) Piston. (6) Seal. (7) Seal.
(8) Passage (for cooling oil).
When the brake pedal is pushed down, the brake
valve pushes brake liquid through the brake valve
outlet, the brake lines, to inlet (1) of each disc brake
assembly. Liquid flows through inlet (1), passage (2)
and pushes on piston (5). Piston (5) pushes against
plates (3) and friction discs (4) to stop any movement
of the lift truck. The five separator plates (3) are
splined to the wheel cover and the four friction discs
(4) are splined to the hub. During brake activation the
piston seals (6) and (7) are deflected by the brake
piston movement.
When the brake pedal is released, the brake liquid
pressure is released and seals (6) and (7) return to
their original position. This seal retraction gives the
running clearance needed between plates (3) and
discs (4). This action will release the brakes on the lift
truck. As the seals retract brake liquid is returned to
the brake valve. The piston automatically slides
outward from the cylinder bore as the friction discs
wear. This new location then becomes the beginning
or at rest position of the seals. This will maintain the
proper clearances of the discs and plates.
When the brakes are activated, heat is generated by
plates (3) and discs (4). Drive axle oil in a separate
brake cooling circuit flows through passage (8) and
cools the plates and discs during normal operation.
Parking Brake
Parking Brake Linkage
(1) Cable Assembly. (2) Switch. (3) Lever.
The band-type parking brake is installed on the input
shaft clutch pack inside the transmission. The parking
brake control assembly is mounted on the cowl. The
parking brake is controlled with a lever. The control
lever is connected to the parking brake with a cable
assembly (1).
The parking brake is activated when the control lever
is pulled. When the operator pulls the control lever,
cable assembly (1) pulls lever (3) which will turn cam
and push strut (5). This will tighten brake band (6) on
the input shaft clutch pack and stop any lift truck
movement.
To prevent driving when the parking brake is activated
(engaged) switch (2) is opened. This will put the
transmission in neutral so the lift truck can not be
driven.
Parking Brake
(4) Cam. (5) Strut. (6) Brake Band.
IDCS211-1S
1 2
3
5
7
6
4
8
4
5
6
3
2
1