Valve in Question MCI

[Dave5Cs]

I am still going through my air system and came across this valve and can't figure out which it is anyone know, Brian maybe. It is in the front Bogie on the ceiling right behind the air bag and looks like the hose goes to the passenger side tank wet I believe. it has the one valve and it has a drain with a handle to open it and close it and a smaller valve next to it but connected to it. Replace or rebuild. Not leaking but old it looks like. The red air line is just bi passing it. It is not connect to it.

Dave

[Tony LEE]

Brake protection valve and in-line filter/water separator

[Brian Diehl]

It is hard for me to tell for sure from the picture, but what you describe sounds like the suspension air filter.  This is a fiber filter designed to clean up the air as much as possible before it is used in the air suspension.  I've replaced mine.  The filter is cheap and is easy to replace as long as the bolts come lose without problems.

[Dave5Cs]

Yep got them soaking with PB blaster cause they won't break loose. I replaced the PPV next to it this morning with a re-man 65 PSI for 22.00 NAPA. I have 1 line coming into the PPV and then it has a short brass fitting between it and the filter. The filter then has a turn/ open/close valve at the end and no other lines. Is there and exit line missing or just 1 line. Book shows another one going to dry tank?

Dave