Hiemstra New member Messages 1 Mar 26, 2020 #1 I could use some help with Bendix AD9 air dryer troubleshooting for my semi. It's dumping air, and I can't figure out why. I've already replaced the dryer and the red valve supply.
I could use some help with Bendix AD9 air dryer troubleshooting for my semi. It's dumping air, and I can't figure out why. I've already replaced the dryer and the red valve supply.