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for air dryer parts? Mostly any air dryer for any truck can be adapted over to another one. It is just a simple issue of mounting and fittings.

Take the little line off on the passengers side of the dryer that goes up to the frame rail. and put an air gun to it and blow back thru it to ensure it isn't stopped up. This goes to the governor. Usually If your getting air to from your compressor to your dryer then your governor is working...

Block the port off. Or i can send you a valve. You may have a bad spring brake diaphragm then.

I will add that a stuck open spring brake override valve could cause no air pressure if it had a bad spring brake diaphragm as well since it is allowing air to go right to them Sent from my SM-G965U using Tapatalk

Start with basics. Make sure all your drain ports are closed. If so. Ensure both valves on the wet tank are open. One is on the front, one is on the top side. Those are primary and secondary valves. They can get closed if they are on their way out. If they are Open, Remove the line coming from...

Or in the event of a linear valve failure as they do like to fail in the closed position.

Take a screwdriver and push in on the purge valve on the bottom of the air dryer. Up inside that little dust cover. It can cause a no air pressure building problem if its stuck out. If you need a replacement dash valve just send me your shipping address and I will send you one free of...

If it is pushed in then your spring brakes will not apply when the system has air pressure when you pull up on your emergency brake and listen for the "honk". Your spring brakes will apply when the system drops below 40 psi or you drain the tanks. The valve only overrides the spring brake...