BENDIX BW1665 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 an
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 identifi ed with cast, embossed letters for ease of 
installation. The letter identifi cation 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 

FIGURE 1 - AR-1

EXHAUST PORT

SERVICE PORT

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