BENDIX ar-2 antilock relay valve Benutzerhandbuch
1
®
SD-13-4796
FIGURE 1 - AR-2
™
ANTILOCK RELAY VALVE ASSEMBLY
DESCRIPTION
The AR-2
™
antilock relay is a specialized air brake valve
developed for use on antilock equipped tractors only. It is
essentially a BP-R1
essentially a BP-R1
™
“bobtail” brake proportioning relay valve
(Bendix Service Data Sheet SD-03-1067) with a modified
cover that permits direct attachment of a Bendix
cover that permits direct attachment of a Bendix
®
antilock
controller such as the EC-15
™
. When combined with an
antilock controller the resulting assembly is referred to as a
antilock controller relay assembly. For example when the
AR-2
antilock controller relay assembly. For example when the
AR-2
™
valve is combined with the EC-15
™
electronic
controller, the resulting assembly is referred to as a CR-16
™
controller relay assembly.
While it is intended for use on antilock equipped tractors,
the AR-2
the AR-2
™
valve functions solely as an air brake relay and
contains no electronics of its own.
The AR-2
™
valve replaces the standard relay valve used to
control the rear axle service brakes and performs the standard
relay function during tractor-trailer operation. During tractor
bobtail operation, the AR-2
relay function during tractor-trailer operation. During tractor
bobtail operation, the AR-2
™
valve reduces brake application
pressure to the lighter rear axle(s) brakes to improve vehicle
controllability and minimize rear axle(s) wheel skid before
antilock is required. The AR-2
controllability and minimize rear axle(s) wheel skid before
antilock is required. The AR-2
™
valve provides added vehicle
braking control and reduces the number of times antilock is
actually needed.
actually needed.
Like the standard relay valve it replaces, the AR-2
™
valve
and its attached antilock controller is normally mounted near
the service brakes it serves. A mounting bracket, furnished
with the valve, permits either frame or cross member
mounting. All air connections on the AR-2
the service brakes it serves. A mounting bracket, furnished
with the valve, permits either frame or cross member
mounting. All air connections on the AR-2
™
valve are identified
with cast, embossed letters for ease of identification and
installation. The letter identification and air line connections
are shown below for reference.
installation. The letter identification and air line connections
are shown below for reference.
Bendix
®
AR-2
™
AntiLock Relay Valve
ANTILOCK CONTROLLER
MOUNTING HOLES(4)
DELIVERY
SUPPLY
DELIVERY
MOUNTING
BRACKET
CONTROL
SERVICE