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I am not sure about the sealing washer you took a picture of. If that is inside the valve assembly of the aftercooler, I didnt take it apart as the new valve assembly came as a unit. I wasn't sure if what you have pictured came from the aftercooler or the actual air dryer. Either way I saw no...

Just a quick follow up. I got both the aftercooler and air dryer rebuild kits, will get to those this week. The main issue was my aftercooler purge valve not seating back fully after the purge, and then air pressure continuing to fall. I bought a new aftercooler purge valve as well, about 30...

Sent you a message....

I was just going to write that after Elijah sent the numbers I pulled up the parts online. I do see it is the aftercooler.... this is all new to me. So thanks again. Does the fact that is is the aftercooler stuck valve change my course of action? Buy both kits and install should fix the issue...

Truck is stored away from home, but snapped this pic today, maybe you can tell the model..? Thanks for the rapid responses. I’ll look up those part numbers, you guys are great!

I'm losing air pressure through the valve on the bottom of my air dryer. I pulled the rubber 90 degree boot on the bottom to gain access, and can push the valve closed to build pressure. when the pressure periodically relieves, the valve sticks open again. I searched all over, wondering if...