BENDIX ar-1 antilock relay valve Manuel D’Utilisation

®

The AR-1

™

 antilock relay valve (Figure 1) is a specialized

service brake relay valve. It is essentially an R-14

™

 relay

valve with a special cover that permits direct attachment of
an antilock controller. When combined with an antilock
controller the resulting assembly is referred to as a antilock
relay controller. For example when the AR-1

™

 antilock relay

valve is combined with the EC-30

™

 tractor antilock controller

the resulting assembly is referred to as a CR-30

™

 antilock

relay controller. While intended for use on antilock equipped
vehicles, the AR-1

™

 antilock relay valve functions solely as

a service brake relay and contains no electronics of its own.

In an air brake system, the AR-1

™

 valve serves as a relay

station to speed the application and release of the service
brakes. The valve is normally mounted in proximity to the
service actuators it serves. A mounting bracket furnished

with the valve permits either frame or cross member mounting.
All air connections on the AR-1

™

 valve are identified with

cast, embossed letters for ease of installation. The letter
identification and air line connections are shown below for
reference.

Supply (to reservoir)

SUP

Delivery (to brake actuator)

DEL

Service (to brake valve rear service delivery)

SER

Like the R-14

™

 relay valve, the AR-1

™

 valve incorporates a

quick release valve adjacent to the service port which provides
for rapid exhaust of control air pressure from above the

FIGURE 1 - AR-1

™

 ANTILOCK RELAY VALVE ASSEMBLY

EXHAUST PORT

SERVICE PORT

QUICK EXHAUST

DELIVERY PORTS

SUPPLY PORT

TYPICAL

MOUNTING

BRACKET

SUPPLY PORT

EXHAUST PORT

DELIVERY

PORT

QUICK

EXHAUST

INLET/

EXHAUST

VALVE

RELAY

PISTON

SERVICE

PORT

QUICK/

EXHAUST DIA.

ANTILOCK

CONTROLLER