Bendix-commercial-vehicle-systems AR-2 ANTILOCK RELAY VALVE 8/11 Uživatelský manuál

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1
®
SD-13-4796
FIGURE 1 - AR-2
ANTILOCK RELAY VALVE ASSEMBLY
DESCRIPTION
The Bendix
®
AR‑2
antilock relay is a specialized air brake
valve developed for use on antilock equipped tractors only.
It is essentially a BP‑R1
®
“bobtail” brake proportioning relay
valve (Bendix Service Data Sheet SD‑03‑1067) with a
modied 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
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
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
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
valve
provides added vehicle braking control and reduces the
number of times antilock is 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
valve
are identied with cast, embossed letters for ease of
identication and installation.
Bendix
®
AR-2
AntiLock Relay Valve
ANTILOCK CONTROLLER
MOUNTING HOLES(4)
DELIVERY
SUPPLY
DELIVERY
MOUNTING
BRACKET
CONTROL
SERVICE
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Shrnutí obsahu

Strany 1 - AntiLock Relay Valve

1®SD-13-4796FIGURE 1 - AR-2™ ANTILOCK RELAY VALVE ASSEMBLYDESCRIPTIONThe Bendix® AR‑2™ antilock relay is a specialized air brake valve developed for u

Strany 2 - OPERATION

10DISASSEMBLYGENERALThe following disassembly and assembly procedure is presented for reference purposes only and presuppos‑es that the appropriate ma

Strany 3

115. Carefully insert the assembled valve (33) and seat (34) into the proportioning piston (30), making certain that the coils of the valve spring (3

Strany 4

12BW1672 © 2011 Bendix Commercial Vehicle Systems LLC. All rights reserved. 8/11. Printed in the United States.

Strany 5 - INJURY OR DEATH:

2FIGURE 2 - SECTIONAL VIEW BENDIX® AR-2™ ANTILOCK RELAY VALVECONTROL PORTPROPORTIONING PISTONINLET/EXHAUST VALVEThe letter identication and air hose

Strany 6

3FIGURE 3 - TRACTOR SERVICE BRAKES APPLYING - TRACTOR TRAILER COMBINATIONSERVICE BRAKES APPLYING - TRACTOR/TRAILER COMBINATIONBrake application air en

Strany 7 - OPERATION & LEAKAGE TESTS

4FIGURE 4 - TRACTOR SERVICE BRAKES HOLDING - TRACTOR TRAILER COMBINATIONOnce past the inlet and exhaust valve, service air pressure exerts a force on

Strany 8 - LEAKAGE TESTS

5FIGURE 5 - TRACTOR SERVICE BRAKES RELEASING - TRACTOR TRAILER COMBINATIONFIGURE 6 - AR‑2™ VALVE BRAKE PRESSURE DELIVERYPREVENTIVE MAINTENANCEGENERAL

Strany 9 - ANTILOCK RELAY VALVE

6FIGURE 7 - SERVICE APPLICATION HOLDING - BOBTAIL TRACTORFIGURE 8 - TRACTOR SERVICE BRAKES RELEASING - BOBTAIL TRACTORTRAILER SUPPLY VALVEINLET-CLOSED

Strany 10 - DISASSEMBLY

72. Stop the engine and remove ignition key when working under or around the vehicle. When working in the engine compartment, the engine should be s

Strany 11 - O-RING IDENTIFICATION CHART

8FIGURE 9 - TYPICAL BENDIX® CR-16™ AIR BRAKE SYSTEM8. Make a full brake application and note that both test gauges register the same pressure. IMPORT

Strany 12

9FIGURE 10 - BENDIX® AR-2™ ANTILOCK RELAY VALVE12330323436353331765292725242628419174018393837820222123151311141210169

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