Well, I did it. At least I have it apart and figured it out. It is a lot more simple than some of the other pump motors I have re built. I will post photos later. But all it is to it is a simple piston and cylinder. The electric motor has the brushes near the base plate so re assemble will be a piece of cake. The armature is fine and so are the brushes. There is some corrosion in the magnet housing, and one magnet was loose. Then the piston / cylinder goes out to the side, and it was stuck completly. There was the problem. There was corosion in the valve also. The rings on the piston are stuck also. So I am soaking it with a little WD 40 and will clean it up before re assemble. There is an o ring at the top of the cyl. where it connects to the valve. I think it needs replaced. I bet a standard orange o ring will work if I can find the right size. I have a few industrial suply houses near here and I will try them.
How do we post photos?
Oh BTW, the magnet can be re glued with a dab of epoxy. I will just shim it in place, and glue it in.I can see why the drier unit is so important. ANY WATER or moisture will reak havok in there. My car sat for a few weeks, and it wouldn't run ( the air motor) But I think I may have another problem. Before it was parked ( I am going thru a divorce and well.... ) it would let the entire car down sometimes. Not all the time. The air bags were replaced, less than 2 yrs ago. What else may be wrong? Would it be only the pump? Or what else will do that?