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1

®

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 a 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 identified with

cast, embossed letters for ease of installation. The letter
identification 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 provides
for rapid exhaust of control air pressure from above the

Bendix

®

 AR-1

 AntiLock Relay Valve

FIGURE 1 - AR-1

 ANTILOCK RELAY VALVE ASSEMBLY

EXHAUST PORT

SERVICE PORT

QUICK EXHAUST

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

Содержание AR-1 ANTILOCK RELAY VALVE

Страница 1: ...normally mounted in proximity to the service actuators it serves A mounting bracket furnished withthevalvepermitseitherframeorcrossmembermounting All air connections on the AR 1 valve are identified w...

Страница 2: ...tors Figure 3 HOLDING BALANCED The air pressure being delivered to the antilock modulators and brake actuators is also present beneath the relay piston When the air pressure above and below relay pist...

Страница 3: ...of wear or physical damage Replace as necessary 3 Test air line fittings for excessive leakage and tighten or replace as necessary 4 Perform the Leakage Test described in this manual EVERY YEAR 100 0...

Страница 4: ...round the vehicle When working in the engine compartment the engine should be shut off and the ignition key should be removed Where circumstances require that the enginebeinoperation EXTREMECAUTIONsho...

Страница 5: ...on a level surface and block the wheels and or hold the vehicle by means other than the air brakes 2 Drain the air pressure from all vehicle reservoirs 3 Identify mark or label all air lines and wiri...

Страница 6: ...6 FIGURE 6 AR 1 ANTILOCK RELAY VALVE WITH CONTROLLER ANTILOCK CONTROLLER 1 MOUNTING BRACKET 2 13 12 11 13 11 15 23 24 25 16 18 17 19 5 26 14 20 21 22 10 9 7 4 8 6 3...

Страница 7: ...o ring 21 from the cap nut 11 Remove and discard the quick exhaust diaphragm 22 from the cover 15 12 Remove the quick exhaust diaphragm retaining screw 23 the diaphragm washer 24 and the diaphragm 25...

Страница 8: ...nd lock washers 26 that secure the bracket to the cover 15 and torque them to 180 220 lb in 11 After noting the relationship of marks made prior to disassembly attach the gasket 2 to the antilock cont...

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