1
®
SD-13-4795
DESCRIPTION
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.
AR-1
™
VALVE
AIR CONNECTION
EMBOSSED IDENT.
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
Bendix
®
AR-1
™
AntiLock Relay Valve
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
AR-1
™
ANTILOCK
RELAY VALVE
AR-1
™
VALVE
WITH ANTILOCK
CONTROLLER
