BENDIX SD-03-3411 Manuel D’Utilisation

®

The Bendix

®

 MV-1

™

 modutrol assembly is an integrated air

control module designed for dash mounting in a truck/tractor.
The bodies for the modutrol assembly, as well as for the
“spool” inserts, are molded of a nonmetallic, noncorrosive
material. The assembly consists of three push-pull type
valves and two optional lever type valves. All valves utilize a
spool “insert,” which can be replaced from the front of the
assembly without removal of the assembly or connecting
air lines.

The three push-pull type valves provide the following functions:

1. Tractor protection control.

2. Trailer service air supply.

3. System park.

4. Trailer park only.

5. Trailer recharge with tractor spring brakes applied.

Reference Figs. 1 & 5, valves V-1 and V-2 utilize identical
spool “inserts.” The functions of valves V-1 and V-2 are
essentially the same as the Bendix

®

 PP-1

™

 control valve.

Valve V-3 utilizes a spool “insert” consisting of two valves; a
nonautomatic push-pull function similar to that of the Bendix

®

PP-8

™

 valve, and a pilot operated three-way valve similar to

that of the Bendix

®

 SV-1

™

 valve.

VALVE   B

VALVE   A

VALVE   C

5-3/8”

VALVE   D

VALVE   E

FIGURE 1 - MV-1

™

 MODUTROL