[encantotom]

i am trying to find out if my rear slide seal has a small leak or there is other reasons it goes down in 24 hours if there is no air source for the coach.  

attached is a picture of the regulator and valves/solenoid that puts air to my rear drivers side slide seal.

so...here is how it works.  


the incoming air comes into the top which is the right side in the picture.  it then passes through a 1/4" shutoff valve.  then it goes into the regulator where it goes from supply pressure (100psi or more) down to 20psi for the slide seal.   then out the bottom of the regulator into a check valve.  the check valve passes air to the solenoid, but is supposed to stop air from flowing back.  i will explain why later.  

from the check valve it goes into the top of the 12v dc solenoid valve.  it is normally open.  with no voltage on it, it passes air through to the air seal on the slide.  and stops air from flowing out the port that evacuated air from the slide when the slide room key is turned on.  when that key is turned, it puts 12v on the solenoid, that closes the incoming air from the supply side and allows the air in slide seal to escape to deflate the seal when you are putting the slide in or out.  (on that port i put a 12v vacuum pump to get all the air out.  

the air going to the slide seal goes out on the bottom of the solenoid on the fitting that is pointed upward.  

so....there is always air being put to the slide seal if there are compressors or shop air on.  the check valve is supposed to stop the air from escaping the seal if the supply air goes to below the 20psi of the slide seal.  

i used an air test jig and am putting air directly to the seal with gauges and valves to remove the entire regulator system.  

i tested each component of the regulator system.  i found the 1/4" shutoff valve was leaking alot either on or off.  i used kids bubble solution full strengh i get at the dollar store.  blows nice bubbles.  

i also test the check valve both ways.  passes air fine.  but in reverse it did leak a little.  i will replace it

so i will rebuild the setup with some new parts and see how it works.  hopefully tomorrow i will still have air in the slide seal....ha

tom