Bendix Commercial Vehicle Systems GEN 5 ABS - Manual (Page 9)

9
FIGURE 8 - Modulator Valve
FIGURE 9 - Rear Axle Valve Assemblies, 4-Port ABS and ABS/ATC Versions Shown
ABS Valves
The ABS modulator valve controls air pressure to individual
brake assemblies. Depending on the particular ABS
configuration, a system may utilize three, four or six
modulator valves. See Figure 8.
Each modulator valve contains two air control solenoids,
which act as pilots to the hold and release diaphragms.
The hold solenoid blocks inlet air to brake chambers; the
release solenoid removes pressure from the brake. The
3-pin threaded connector has pins for the hold and release
solenoid and a third, common terminal.
Rear Axle Valve Assemblies
Rear Axle Valve Assemblies are available for some
applications depending on OEM preferences. They are
combinations of two modulator valves and a relay valve.
The assemblies are available in 4.0 and 5.5 PSIG versions,
with or without an integral ATC solenoid.
ATC Version
Standard Version
Twist-Lock
Connector
Threaded
Connector
1/2 NPT
Inlet Port
1/2 NPT
Inlet Port
Exhaust Port
Exhaust Port
1/2 NPT
Delivery Port
1/2 NPT
Delivery Port