Disc Brake PAN 17
LEYLAND / DAF - Edition 12/2000
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1. Description of the Mechanical Sliding Caliper Disc Brake
The „PAN“ Brake is a Floating Caliper Disc Brake, designed for installation on front and rear
axles in trucks or buses as a Service, Emergency and Parking Brake. The brake is actuated
mechanically via a Diaphragm or Spring Loaded Cylinder which is mounted directly to a cover on
the brake caliper, resulting in a relatively short overall axial length and compact brake package.
The complete disc brake including brake cylinder consists of two assemblies, the brake caliper (1)
and the brake carrier (2).
Fig. 1
The brake caliper (1) slides axially on guide pins (8, 9) mounted in the brake carrier (2) and the
axially moveable brake pads (35, 36) are held in the brake carrier by a hold down hoop (38) and
hold down springs (37). Thereby the brake force is then transmitted to the abutment faces in the
brake carrier – shown in Fig. 1, 2 & 3.
The radially open design of the brake caliper allows for simple and quick changes of the brake
pads.
The actuation unit of the brake is equipped with an Automatic Adjuster to compensate for wear of
the brake pads and brake disc. This Automatic Adjuster, independent of load and operating
conditions, maintains a constant predetermined gap between brake pads and brake disc. This,
together with the robust and stiff construction of the brake caliper, ensures safe control of the
brake system and increases safety margins during emergency stopping.
The internal moving components of the brake are lubricated for life, and all sealing components
are maintenance free unless damaged.
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