Air dryer quick connect fitting

[3406E]

Changing my air dryer and the quick fit plastic thing fell out. Cannot find fitting anywhere. One side has threading and other is quick fit-90 degree 7/8 wrench size. Helppp please !

[Rawze]

(11-11-2025 )3406E Wrote:  Changing my air dryer and the quick fit plastic thing fell out. Cannot find fitting anywhere. One side has threading and other is quick fit-90 degree 7/8 wrench size. Helppp please !

what side hose?>
here is some that might fit...
https://amzn.to/4qVrS96

personally though.. for critical systems like air brakes, etc... I prefer these type...
https://amzn.to/487oD73
they are far less prone to leakage.

[3406E]

Thank you, I found them at a store just now, but I still ordered those ones for spare you shared.

[3406E]

Do I have to max out the threading when tightening? That’s how I messed that fitting up. I tried to screw the fitting until no threading left. Do I still use thread tape even though it has lock tight on it?

[SquareOne]

(11-11-2025 )3406E Wrote:  Do I have to max out the threading when tightening? That’s how I messed that fitting up. I tried to screw the fitting until no threading left. Do I still use thread tape even though it has lock tight on it?

No, you don't have to run the threads until there is no more...typically it will crack before the threads would not be visible. That style of fitting has a tapered thread, hence why it progressively takes more force fairly early on, to make a revolution.

I add some thread sealant before installing, then snug down (not gorilla tighten) until it's pointed in the proper direction.

[3406E]

Got it done, took me way longer than should. It’s in a crooked spot under the truck - between the dr shaft and above both air tanks. I had to drop one tank and that was still tight.