I am in the middle of trying to determine why the Vacuflush pump is short cycling for the forward head. The back story is this.
Originally the pump jammed, and due to a combination of not knowing how the pump is designed along with the way it is installed (could not see the cam eccentric) I inadvertantly loosened the main body clamp. At that point I realized what I had done so I just removed the pump assembly so I could better work on it to put it back together. I reinstalled the assembly then it started cycling about every 10 minutes. Thinking I may have a loose hose clamp or something along those lines I tightened the nipples on both sides where the duckbills are installed along with the main body clamp and all hose clamps. After that....it cycled about every two minutes.
Thinking I may have damaged an o-ring or a duckbill I removed the assembly again, ordered a rebuild kit with all new duckbills, o-rings and bellows assembly. Put all the new parts in the pump and just completed reinstalling it. I still have the exact same issue, the pump cycles about 4 strokes every two minutes or so.
Now, I am looking for troubleshooting advice. Logic tells me that since it WAS NOT cycling before it jammed and now does after I took the pump apart I still don't have the pump put together properly. My only hesitancy with that scenario is the pump is very simple and all of the work was done on a bench with no problems. Any advice on which way to go with troubleshooting and what to look for next...
Originally the pump jammed, and due to a combination of not knowing how the pump is designed along with the way it is installed (could not see the cam eccentric) I inadvertantly loosened the main body clamp. At that point I realized what I had done so I just removed the pump assembly so I could better work on it to put it back together. I reinstalled the assembly then it started cycling about every 10 minutes. Thinking I may have a loose hose clamp or something along those lines I tightened the nipples on both sides where the duckbills are installed along with the main body clamp and all hose clamps. After that....it cycled about every two minutes.
Thinking I may have damaged an o-ring or a duckbill I removed the assembly again, ordered a rebuild kit with all new duckbills, o-rings and bellows assembly. Put all the new parts in the pump and just completed reinstalling it. I still have the exact same issue, the pump cycles about 4 strokes every two minutes or so.
Now, I am looking for troubleshooting advice. Logic tells me that since it WAS NOT cycling before it jammed and now does after I took the pump apart I still don't have the pump put together properly. My only hesitancy with that scenario is the pump is very simple and all of the work was done on a bench with no problems. Any advice on which way to go with troubleshooting and what to look for next...