A relay valve is an air-operated valve typically used in air brake systems to remotely control the brakes at the rear of a heavy truck or semi-trailer in a tractor-trailer combination. This is the parking brake relay also some one saying control valve, this is used for multiply actuators used in one line, in the relay having 4 hose connections 2 hose pipe for brake actuators and one is comming from parking brake lever and another is comming from air tank which one is comming from air tank that having all time air pressure in this hose pipe in relay, if having any problem with relay supposed that air leakink then parking brake will automatically locked and one more problem will occur when driver will apply service brake then air will drop more from the rank we can absorb in air pressure gauge.
- Күн бұрын
Parking Brake relay (control valve) seal replacement and rebuild
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