Embarrassed to ask but I'm at a loss

What type of connections do you have, compression style fittings or push connect style? Send a pic of one with a hose disconnected. Compression style have a stiffener that goes into the end of the airline. Push connect have an o-ring inside the body of the fitting.

Here's a video.

 

If they’re the push in ones make sure the airline is cut square on the end.

 

And it's not uncommon for push to fit to be one time use unless you can replace the seals. If you have one leaking, replace it with a compression fitting and never worry about it again. Those push to fit are there to save assembly costs, not because they work better than compression.

 

Did you replace the o rings too?

 

If its a compression style push in or ferrule and nut fitting make sure you have the tubing stiffener insert inside the end of the tube. Made of either brass or plastic. This keeps the tube from deforming and being crushed at the connection. The old tube ends that were cut off may have them. Sometimes you can reuse them. Altho it May be difficult to remove them from the old boogered up tube sometimes.

 

When you tighten the lines on the compression fittings don't make them too tight that will make them leak. It's not the tightness that stops them from leaking it's the Ferrell pushes up against the barrel and that seals it. When you tighten them out just get to where you can feel that it's starting to get tight and stop. It's not a bolt that you want to crank down.

I only use compression fittings. The only time I'll use a push fitting is if it's maybe under my Dash or something hard to get to that I could just push it in and forget it.

 

I’m wrestling with them myself. The 3 air switches on my dash. Suspension dump, and axle lock have fat o rings, and plastic lock rings. One of them is broken. The fifth wheel slider has brass inserts, thin o ring and brass lock ring. It’s the only one with a brass tube insert. Took some lock rings off a Cascadia firewall manifold. They’re steel, with plastic inserts. They don’t work. The o rings are only bad on the supply side of the switches. I was able to re use 2 good o rings, and plastic lock rings for the suspension. The other 2 are crimped off for now. I hate these switches anyways. The suspension switch still leaks at the switch, till I tap on it. They got to go. Any suggestions? Prefer the Pete style. I need the room for more gauges anyways. The fifth wheel switch doesn’t have an indicator light. The other two have them. 2 blades on each switch. Rather do away with the quick connects. Yes a seemingly simple thing, yet it isn’t. PITA.

 

My newest Star came without indicators for the air switches. Just ordered pressure switches and a tee with the proper threads and quick connects on the other two sides. Got some small led indicators in various colors and all I had to do was find a hot for power. The leds went in one of the switch blanks.

 

That’s nice job. My 92 had the little lights on the ends of chrome toggle switches. They were the coolest. Different colors for different things. Red, yellow, blue and green. Little expensive. I’d like to put them on my Freightliner. WS still makes a good Truck. Premium compared to any new Freightliner. About the only other Truck I’d buy. Mainly because I’m somewhat familiar with them.