BENDIX MC-12 MODULATOR CONTROLLER ASSY Instrukcja Naprawy Pobierz pdf (Strona 22)

More info: visit www.bendix.com 1-800-AIR-BRAKE (1-800-247-2725)

Foundation Brakes, continued

a “premium” material designed for high heat situations

instead of a “standard” material designed for lighter

duty operations.

Brake

Block

Brake Lining

Air Disc Brakes

Bendix air disc brakes are a “ﬂ oating caliper” design

for use as a foundation brake on all axles of heavy

commercial vehicles and trailers. In terms of per-

formance and ease of service, Bendix air disc brakes

compared favorably to traditional S-Cam brakes. They

are available in models with or without a combination

spring brake chamber.

Bendix air disc brakes convert air pressure into

braking force. When the foot brake is applied, air from

the vehicle brake system enters the service brake

chamber through the supply port, applying pressure to

the diaphragm. The pressure pushes the diaphragm,

moving the pressure plate and pushrod against a cup

in the lever. The lever pivots on an eccentric bearing

and transfers motion to the actuating beam. Moving

against return spring force, the actuating beam moves

two threaded tubes and tappets, which force the inner

brake pad into contact with the brake rotor. Further

movement of the actuating beam forces the caliper,

sliding on two stationary guide pins, away from the

rotor, which pulls the outer brake pad into the rotor.

The clamping action of the brake pads on the rotor

applies braking force to the wheel.

Releasing the foot brake releases pressure in the

service brake chamber. With no pressure in the service

brake chamber, return springs force the air disc brakes

into a neutral, non-braked position. The non-braked

position is mechanically controlled by a brake adjuster

mechanism in the caliper. The caliper contains a brake

adjuster mechanism that turns threaded tubes to set

a gap (running clearance) between the rotor and the

brake pads. When operated manually with the adjuster

shaft, the adjuster mechanism sets the system’s

non-braked position. The adjuster mechanism also

operates automatically, whenever the brakes are

activated, to compensate for rotor and brake pad wear

and keep the running clearance constant.

The rotor-friction couple is carefully designed for

optimal performance and durability. It is recommended

that only approved replacement disc pads or rotors be

used to prevent damage to disc brake components

(e.g. cracked rotors) or premature or uneven pad wear,

which can adversely affect braking performance.

Air Disc Brake

Cut-away View

Lever

Rotor

Eccentric

Bearing

Inner

Brake Pad

Outer

Brake

Pad

Actuating

Beam

Actuator

Rod

Supply Port

Brake

Chamber

Brake Pad Friction

Material

Rotor

AIR DISC BRAKE

1 2 ... 17 18 19 20 21 22 23 24 25 26 27 ... 69 70

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