Troubleshooting guide

29
www.bendix.com 1-800-AIR-BRAKE (1-800-247-2725)
The Bendix
®
MV-3
™
dash control module is a two-
button, push-pull control valve housed in a single body
which includes a dual circuit supply valve and a check
valve. The MV-3
™
valve can duplicate the functions of
any existing two or three valve push-pull system and
has the advantage of reduced plumbing.
The MV-3
™
module body, plungers and spools are made
out of a non-metallic, non-corrosive material. All air
connections are at the back of the module with the
exception of the optional auxiliary port.
The MV-3
™
module provides the following functions:
• Tractor Protection Control.
Delivery
Delivery
Supply
#1
Exhaust
Port
Auxiliary
Delivery
Port
Tractor
Spring
Brakes
Supply
#2
Tractor
Service
Reservoir #2
Tractor
Protection
Valve
Tractor Service
Reservoir #1
• System Park.
• Trailer Park Only.
• Trailer Charge with Tractor Spring Brakes Applied
(Tractor Park Only).
• Supply Reservoir Selection.
• Primary & Secondary Reservoir Connections.
The MV-3
™
dash control module combines the
functions of a PP-1
™
control valve and a PP-7
™
trailer
supply valve together into a unified device.
Trailer Control (TC) valves are hand-operated,
graduated control valves. The most common use of
trailer control valves is for independent control of
trailer service brakes, however, the valve can be used
for any application where graduated application
pressure is required.
These valves use a cam and spring mechanism to control
delivery air pressure and are available with several
different styles of body, clamp and handles. Some
models are available with self-returning handles. Trailer
control valves are often used to hold the vehicle while
the vehicle’s clutch and accelerator are co-ordinated.
The trailer control valve should never be used for
parking.
TC-6
™
Trailer
Control
Valve
Dash Control Modules
TC-2
™
Trailer
Control
Valve