Dave do you have one of those air dryers under the truck that has the small black canister on it and the governor? if so i would put you had on the bottom of the dryer and see if there is any air slowly coming out, you can spray it with glass cleaner or soapy water to see if it bubbles and spray all the air fittings around the dryer to. If its leaking out the bottom then its your purge valve. They are not cheap however as i have done with the last 3 trucks i remove the dryers i believe its called a ADIS type and just put on a AD9 and install governor right on the compressor and run couple new syntex line or rubber braided from it to new dryer. I change my cartridge early fall and never had a problem since.
Dreaded air dryer problem...
Discussion in 'Mack Forum' started by Dave1837, Mar 6, 2021.
Page 2 of 2
Page 2 of 2