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The air applied model 5040-A is a pneumatically operated caliper
requiring only an air supply and a pressure regulator. The pressure regulator can
be adjusted to provide the customer with the desired torque or stopping
characteristics. Two air-on actuators consisting of a double diaphragm system provide an equal
force to each brake shoe when an air pressure is applied. The action of compression
springs return the caliper to the 'brake-off' position when the air pressure is shut off.
Caliper 5040-A is also avaliable in a mechanically applied model. A 5400 lb. pulling force is required to drive a wedge between the two brake arm levers thereby applying the brake.
Both types employ the balancing link which ensures equal wear on both linings.
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