How does an mv3 valve work?
The Bendix® MV-3® dash control module is a two-button, push-pull control valve housed in a single body that accommodates dual circuit supply through a double check valve. The MV-3 valve can duplicate the functions of any existing two- or three- valve push-pull system and has the advantages of reduced plumbing.
What controls the tractor protection valve?
Operate the tractor protection valve manually by pulling out the trailer air supply control (red knob). This shuts off the air supply to the trailer and applies the trailer emergency brakes. To resupply the trailer brakes with air, push the red knob in.
What does it mean when your air brake is leaking?
With the introduction of spring brakes, anti-compounding and 121 air brake systems, because a valve is leaking air out of its exhaust, does not mean the valve is at fault. If a spring brake is leaking from the the spring brake to the service brake side, that air will travel back up the service line and out the exhaust of the next valve back.
Where is air leak in tractor trailer brakes?
Air Leak at the Exhaust Port of Tractor Protection Valve with Tractor and Trailer Brakes Released Problem #8 Air Leak at the Exhaust Port of Park Control and Trailer Supply with Tractor and Trailer Brakes Released
What causes air brakes to release too slowly?
Brakes Apply Too Slowly -Brakes need adjusting or lubricating. -Low air pressure in the brake system (below 60 psi). -Insufficient brake valve delivery pressure. -Excessive leakage with brakes applied. -Restricted tubing or hose. -Treadle travel restricted. -If remote mounted brake valve, check linkage. 3.) Brakes Release Too Slowly
What kind of material is the mv-3 valve made out of?
The MV-3 valve body, plungers and spools are made out of a non-metallic, non-corrosive material. All air connections are at the back of the valve with the exception of the optional auxiliary port as shown in Figure 1. The MV-3 valve provides the following functions: 1 – Tractor Protection 2 – Trailer Service Air Control 3 – System Park