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The tractor air control valve? Stops air from flowing to trailer red air line. Safety switch incase trailer falls off truck all the air will not go out the broken hose and cause tractor spring brakes to lock up due to low air. It can be tested by disconnecting red air line while trailer brakes air released. Air should stop at about 30psi I think.
What else can I help you with?
What does a mv3 valve do?
MV3 valve is specifically a Bendix product. It's basically the (tractor) brake control valve and trailer supply valve in one housing.
What is the color of the air brake knob on a peterbilt?
Yellow for the tractor brake control valve, red for the trailer supply valve.
When checking the trailers emergency brakes the tractor protection control valve should be place in what position?
Off.
How can you test the trailer emergency brake?
Charge the trailer air brake system and check that the trailer rolls freely then stop and pull out the trailer air supply control also called tractor protection valve control the trailer emergency valve or place it in with the tractor to check that the trailer emergency brakes are on.
Why control valve hunting occures?
oversize for its use
How does pressure control valve control the pressure?
Depends on what kind your talking about. It actually does not control it is a reducing valve by use of diaphragm and spring tension setting in most applications
Where is the heater control valve located on a 1997 Chrysler LHS?
It does not have a heater control valve.It does not have a heater control valve.
What is a tractor trailer protection valve?
protection valve maintains air in the tractor brake system in the event of the trailer air lines becoming compromised.for example, if a trailer line is leaking, broken or disconnected
How you CAN remove hunting problem of process control valve?
use a PID controller
What would one use a thermostatic radiator valve for?
A thermostatic radiator valve is a valve that is connected to the hot water heating system. It can control the room temperature by regulating the amount of water that goes into the radiator. The valve is able to control this by sensing the temperature of the air.
Does a recovery vehicle with a full air brake system require a tractor protection valve?
If it's an on-road vehicle manufactured during or after 1975, then yes, it must. It must also have a dual circuit air system, in accordance with FMVSS 121. On a related note, a lot of drivers seem to think the tractor protection valve is the valve which releases the spring brakes on the power unit, and pokes through the dash with a (usually) yellow knob - it is not; that is the brake control valve, which must also be present.
What is code sid 146 for a 2004 Volvo tractor trailer?
EGR Valve
