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Really great thread OD. We need to roll this into a definitive LMTV air brake sticky. It sucks to page through 10 threads to find those part numbers for brake chambers or rebuild kits for one way valves.

Any progress OD? I got my valve and fittings but have no time and a battery issue to contend with first.

Only thing i can think of unless the valve is faulty. Were the brakes releasing?

Im kind of thinking res 2 needs to be plumbed in to air source. Like park and trailer are setup for seperate source and needs t instead of plug.

When you push park in and it stops venting are the brakes released?

I found very low priced seller so i picked up a couple valves. Now i just need to pick up my fittings and follow along.

Great job OD! Sorry i was late in posting but glad it worked out. I was going to offer to buy them locally and ship them.

You should have an industrial hose supplier in your area. Any place that deals with hydraulic lines should carry air line stuff. We have a company locally called pacific rubber, they carry the same dot fitting for $3-$4.

Ok i see. Reducer bushings from 3/8 to 1/4 would work. The fittings on there are the same as i linked. You push or pull on the collar and the line pulls out to change them. I would be concerned about adding more leak points by using the reducers but they would be safe. Dot just certifies them...

to connect the air lines to valve. use DOT connectors. threaded on one end and push the tubing into the other. they are cheaper locally if you have a hose supplier or big rig parts store. hose barbs are not approved and your safety is at stake...