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This caliper is operated by an automotive
brake actuator. The brake actuator, which is
used on medium and heavy duty trucks, has two
functions. The upper housing has a spring
which is forcing the actuator rod downward,
pushing the wedge against the rollers and
applying the brake. Air pressure is required to
overcome the spring to put the brake into a
released position. If there is no air pressure
going to the actuator, the upper brake portion
applies the brake providing emergency
braking.
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The lower portion of the actuator is a
diaphragm that also pushes the rod downward
and applies the brake proportionately. A very
light return spring pushes the wedge upward
to release the brake. This allows for the brake
to be used in two different versions. The
upper spring can only provide up to 60% of
brake force. In order to modulate the brake,
the air pressure can be varied in the
diaphragm portion. Since there is no piston in
this actuator assembly, there is practically no
hysteresis, as far as the actuator is
concerned. This makes it extremely sensitive
to varying air pressures.
The wedge mechanism consists of a wedge
and rollers that force the levers apart to apply
pressure to the brake disc and give a very
accurate control over the brake torque.
Accessories Available:
Standard Shim Kit
5026-3500 Shim Kit
5026-3000 Shim Kit
5026-2500 Shim Kit
5026-3000/2500 Shim Kit
* Quantity May Vary
** Refer to Product Sheet
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