Owner manual

ManualsBrandsBendix Commercial Vehicle Systems ManualsEquipmentAR-1 ANTILOCK RELAY VALVE 01/11

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 an

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 identiﬁ ed with cast, embossed letters for ease of

installation. The letter identiﬁ cation 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

Bendix

AR-1

™

AntiLock Relay Valve

FIGURE 1 - AR-1

™

ANTILOCK RELAY VALVE ASSEMBLY

EXHAUST PORT

SERVICE PORT

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

Summary of content (8 pages)

PAGE 1
SD-13-4795 ® Bendix® AR-1™ AntiLock Relay Valve AR-1™ ANTILOCK RELAY VALVE AR-1™ VALVE WITH ANTILOCK CONTROLLER SERVICE PORT ANTILOCK CONTROLLER QUICK/ EXHAUST DIA. SERVICE PORT QUICK EXHAUST RELAY PISTON TYPICAL MOUNTING BRACKET SUPPLY PORT INLET/ EXHAUST VALVE DELIVERY PORT SUPPLY PORT DELIVERY PORTS EXHAUST PORT EXHAUST PORT FIGURE 1 - AR-1™ ANTILOCK RELAY VALVE ASSEMBLY DESCRIPTION The AR-1™ antilock relay valve (Figure 1) is a specialized service brake relay valve.
PAGE 2
EC-15™ ANTILOCK CONTROLLER AR-1™ ANTILOCK RELAY VALVE TYPICAL MOUNTING BRACKET FIGURE 2 - CR-15™ ANTILOCK RELAY CONTROLLER provides for rapid exhaust of control air pressure from above the relay piston. The standard AR-1™ valve is offered with a 4 psi crack pressure, however, with the addition of various springs beneath the relay piston, higher crack pressures are possible.
PAGE 3
ANTILOCK CONTROLLER QUICK EXHAUST DIA. SERVICE PORT EXHAUST RELAY PISTON SUPPLY PORT INLET/EXH. VALVE DELIVERY PORT RESERVOIR ANTILOCK MODULATOR EXHAUST BRAKE ACTUATOR FIGURE 3 - AR-1™ VALVE BRAKE APPLICATION ANTILOCK CONTROLLER QUICK EXHAUST DIA. SERVICE PORT EXHAUST RELAY PISTON INLET/EXH.
PAGE 4
ANTILOCK CONTROLLER QUICK EXHAUST DIA. SERVICE PORT EXHAUST RELAY PISTON INLET/EXH. VALVE SUPPLY PORT DELIVERY PORT RESERVOIR ANTILOCK MODULATOR EXHAUST BRAKE ACTUATOR FIGURE 5 - AR-1™ VALVE EXHAUST - BRAKE RELEASE EXHAUST - BRAKE RELEASE When the brake application is released, air pressure in the service port of the AR-1™ valve returns to the foot brake valve and is exhausted. Air, from above the relay piston, flows back through the cover to the exhaust diaphragm.
PAGE 5
response is noted at all wheels, inspect for a kinked or obstructed air line leading to or from the AR-1™ valve. 2. If a complete release of the brakes is noted at some, but not all wheels, test the antilock modulator between the AR-1™ valve and the brake actuator for proper operation. If an incomplete release is noted at all wheels, inspect for a kinked or obstructed air line leading to or from the AR-1™ valve. 3.
PAGE 6
1 ANTILOCK CONTROLLER 2 13 13 11 11 12 26 15 22 23 24 25 16 20 14 18 17 19 5 10 9 8 6 7 4 3 FIGURE 6 - AR-1™ ANTILOCK RELAY VALVE WITH CONTROLLER 6 MOUNTING BRACKET 21
PAGE 7
the maintenance kit should always be used in lieu of those presented here. Refer to Figure 6 throughout the disassembly and assembly procedure. CLEANING & INSPECTION CAUTION: The AR-1™ valve may be lightly clamped in a bench vise during disassembly, however, over clamping will cause damage to the valve and result in leakage and/ or malfunction. If a vise is to be used, position the valve so that the jaws bear on the supply ports on opposing sides of the valve’s body. 2.
PAGE 8
. Install the o-ring (18) on the relay piston (17), then install the piston in the body (5). 9. After noting the relationship marks made prior to disassembly, assemble the cover (15) on the body (5) and the mounting bracket on the body (5) and secure the components together using the two cap screws (11) and two bolts (13), lock washers (12), and nuts (14). Torque the cover cap screws (11) and bolts (13) to 120-150 lb. in. 10.