M925A2 air dryer issue

[JFawkes]

Hello all,

I have an M925A2 that I've slowly been working on, and recently developed a problem and I'm hoping for some easy guidance.

Long story short...I was giving it a run just to keep everything in good working shape and right as I was getting ready to shut it down I noticed I had a low air pressure warning. I pulled it back into the bay and shut it down so I could figure out what's going on.

If I restart it now I get very little air pressure in the main tank and basically none in the secondary. I crawled around to see if I can spot what's going on and noticed air coming out of bottom of the air dryer...I'm not sure if that's the only problem or not, but it's where I have to start.

I haven't done any maintenance on the air dryer and I'm new to dealing with them...I was told by the previous owner that he had just serviced it recently at the time, but that was awhile ago.

Anyways...I'll attach a picture and a link to it on video if anyone can offer guidance on what I need to get this sorted out.

As always - thank you.

Here is a link to a video clip of it running.

 

[simp5782]

Replace the air dryer. AD9 Style are pretty cheap and get a 24v heater for it.

You can rebuild the purge valve but it generally doesn't last very long.

 

[ericp351]

For now- the purge vlv comes apart with just a few snap rings, in place. A cleaning will get you thru to getting a new unit. When it blows on the road- pull over and bump with something small and blunt, like a small nut driver.

 

[Mullaney]

Hello all,

I have an M925A2 that I've slowly been working on, and recently developed a problem and I'm hoping for some easy guidance.

Long story short...I was giving it a run just to keep everything in good working shape and right as I was getting ready to shut it down I noticed I had a low air pressure warning. I pulled it back into the bay and shut it down so I could figure out what's going on.

If I restart it now I get very little air pressure in the main tank and basically none in the secondary. I crawled around to see if I can spot what's going on and noticed air coming out of bottom of the air dryer...I'm not sure if that's the only problem or not, but it's where I have to start.

I haven't done any maintenance on the air dryer and I'm new to dealing with them...I was told by the previous owner that he had just serviced it recently at the time, but that was awhile ago.

Anyways...I'll attach a picture and a link to it on video if anyone can offer guidance on what I need to get this sorted out.

As always - thank you.

Here is a link to a video clip of it running.

.
And sometimes you can put your hand (palm) over the exit on the dryer and it may reseat itself. Definitely NOT the real fix, but it may close the valve enough for you to build air...

 

[simp5782]

Just leave the wet tank open so that the system won't purge and blow off is the only real way to deal with it on the road . Disadvantage is more compressor moisture and it's cold