BENDIX SD-13-4811 ユーザーズマニュアル
1
SD-13-481
1
DESCRIPTION
The ATR-1
™
antilock traction relay valve is a specialized air
brake valve developed for use on Bendix antilock/traction
equipped vehicles.
equipped vehicles.
It is essentially three separate valves working in
combination in a single housing. An R-14
combination in a single housing. An R-14
®
style service
relay is the base valve and is fi tted with a modifi ed cover
containing a double check valve and a traction control
solenoid. The ATR-1
containing a double check valve and a traction control
solenoid. The ATR-1
™
valve contains both air and electric
components to provide the service braking and traction
control (differential braking) functions. A Bendix antilock
traction controller can be mounted to the ATR-1
control (differential braking) functions. A Bendix antilock
traction controller can be mounted to the ATR-1
™
valve or
a cover plate can be installed and the antilock controller
mounted elsewhere on the vehicle. When an ATR-1
mounted elsewhere on the vehicle. When an ATR-1
™
valve
is combined with an antilock traction controller the resulting
assembly is referred to as an antilock traction assembly.
assembly is referred to as an antilock traction assembly.
The ATR-1
™
valve replaces the standard relay valve used
to control the rear axle service brakes and performs the
standard relay function. Like the standard relay valve
it replaces, the ATR-1
standard relay function. Like the standard relay valve
it replaces, the ATR-1
™
valve (sometimes with 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 ATR-1
valve, permits either frame or cross member mounting.
All air connections on the ATR-1
™
valve are identifi ed for
ease of installation. The letter identifi cation and air line
connections are shown below for reference.
connections are shown below for reference.
ATR-1
™
VALVE AIR CONNECTION
EMBOSSED
IDENT.
Supply (to reservoir)
SUP
Delivery (to brake chamber)
DEL
Service (to brake valve rear delivery)
SER
Control (not drilled or threaded on
ATR-1
ATR-1
™
valve)
CON
The ATR-1
™
valve is part of the R-12
®
family of relay valves
which includes the R-12
®
, R-14
®
, BP-R1
®
, AR-1
™
.
The internal components of the relay portion of all of these
valves are interchangeable with the R-12
valves are interchangeable with the R-12
®
valve and
therefore the same basic components are used to service
all of them. The ATR-1
all of them. The ATR-1
™
valve is available with various
crack pressures to accommodate specifi c applications,
however, the standard is 4 psi.
however, the standard is 4 psi.
Bendix
®
ATR-1
™
AntiLock Traction Relay Valve
SUPPLY
PORT
BODY
MOUNTING
BRACKET
SERVICE
PORT
CONTROLLER MOUNTING
HOLES (4)
UNTAPPED PORTS
COVER PLATE FOR
REMOTE MOUNT
REMOTE MOUNT
ATR-1
ATR-1
™
RELAY
VALVE
ALTERNATE
CASTING ON
NEWER VALVES
(NOTE THAT THE
SERVICE PORT
LOCATION IS
CHANGED)
CASTING ON
NEWER VALVES
(NOTE THAT THE
SERVICE PORT
LOCATION IS
CHANGED)
UNDRILLED
“CON” PORT
DELIVERY
PORTS (4)
2 PIN SOLENOID
CONNECTOR
SUPPLY
PORT
FIGURE 1 - ATR-1
™
ANTILOCK TRACTION RELAY VALVE
TRACTION
CONTROL
SOLENOID
SERVICE
PORT