BENDIX BW1672 Bedienungsanleitung Seite 1

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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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Inhaltsverzeichnis

Seite 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

Seite 2 - OPERATION

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

Seite 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

Seite 4

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

Seite 5 - INJURY OR DEATH:

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

Seite 6

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

Seite 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

Seite 8 - LEAKAGE TESTS

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

Seite 9 - ANTILOCK RELAY VALVE

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

Seite 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

Seite 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

Seite 12

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

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