BENDIX AR-2 ANTILOCK RELAY VALVE Manuel
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Bendix
AR-2
AntiLock Relay Valve
DELIVERY
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FIGURE 1 - AR-2
ANTILOCK RELAY VALVE ASSEMBLY
DESCRIPTION
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The AR-2
antilock relay is a specialized air brake valve
developed for use on antilock equipped tractors only. It is
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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
controller such as the EC-15
antilock controller the resulting assembly is referred to as a
antilock controller relay assembly. For example when the
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AR-2
valve is combined with the EC-15
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
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valve functions solely as an air brake relay and
contains no electronics of its own.
ANTILOCK CONTROLLER
MOUNTING HOLES(4)
MOUNTING
BRACKET
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antilock
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. When combined with an
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electronic
SUPPLY
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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
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
braking control and reduces the number of times antilock is
actually needed.
Like the standard relay valve it replaces, the AR-2
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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
with cast, embossed letters for ease of identification and
installation. The letter identification and air line connections
are shown below for reference.
CONTROL
DELIVERY
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valve reduces brake application
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valve provides added vehicle
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valve are identified
SERVICE
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valve
1