BENDIX MC-12 MODULATOR CONTROLLER ASSY Anleitung zur Fehlerbehebung PDF herunterladen (Seite 17)

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

E-10PR

™

Brake

Valve

force from the brake valve the internal return springs

move back to their original position and allow air in the

valve and delivery lines to vent to atmosphere through

the exhaust port.

The Bendix

E-6

, E-8P

, E-10

™

, E-10P

™

, E-12

™

and

E-15

™

dual brake valves are typically ﬂ oor mounted

and treadle operated, while the Bendix

E-7

™

and

E-14

™

dual brake valves are bulkhead mounted,

suspended pedal valves.

Section 3: The Control System

•

Vehicle parking using push-pull hand operated

valves and spring brakes,

• Anti-compounding system design to prevent both

the service brakes and the parking brakes being

applied at the same time, and

• Proportioning valves to adjust braking when a

tractor is not pulling a trailer

The control system typically consists of:

• A foot brake valve and often an additional hand-

operated trailer brake control valve

• Brake actuators or rotochambers, to change the

applied air pressure into a push-rod force which

operates the foundation brakes (air disc, S-Cam,

etc.)

• Quick release valves to assist in releasing the

brakes quickly

See the inside front cover for a sample system schematic. The primary (rear) brake circuit is

shown in green and the secondary (front) brake circuit is shown in orange.

E-6

Brake

Valve

Note: Brake valve

replacements are typically

ordered without the foot

pedal components. For

illustration, full assemblies

are shown here.

Dual Circuit Brake Valves

When the driver applies the service brakes using the

brake pedal/treadle, a two-part plunger within the brake

valve moves, closing the valve’s exhaust and opening

passages within the valve that allow the air pressure

waiting there to pass through and be delivered to the

rear and front brake systems. The pressure quickly

increases in the brake chambers and applies force to

the push rod, transferring the force to the S-cam or air

disc brake. Frictional forces slow the wheels and the

vehicle comes to a stop. When the driver removes all

E-10

™

Brake

Valve

E-7

™

Brake

Valve

E-12

™

E-15

™

Brake

Valves

E-10P

™

Brake

Valve

E-8P

Brake

Valve

E-14

™

Brake

Valve

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