Fass pump has no presuure

[mpiller]

I recently had a thread about installing a fass pump for wvo and now that I have been able to install it correctly it won't pump at all. It turns on and sounds like it is pumping, but it barely pushes the oil and makes no pressure at all. I know that these pumps are picky about air in the lines and being primed and such, but I have done the 5 gallon bucket test with pump alone and it will still barely pump the diesel. I have taken it apart and put it back together once since it stopped pumping, and the first time I used it I saw it pump 70 psi constantly for a few minutes and then it stopped. That was using power from the stock pump so I figured it just wasn't getting enough power, I rewired it with 2 relays and 30 amps from the battery and now it has no pressure at all. Any ideas to what this could be? It's a brand new pump.
Thanks

[vegginpsd]

Call Fass.


I hope you didnt take it apart. like the four bolts holding the pump head on....
Thats a big no-no with the Fass boys.

[simone0414]

Don't tell them you took it apart.

[vegginpsd]

Originally Posted by simone0414

Don't tell them you took it apart.

LOL. They will know with the security wire from the four head bolts missing!
I hope he didnt take the head bolts out......

[mpiller]

I wish you hadn't told me there was a security wire... It didn't work so like all other things that don't work I took it apart to see what was wrong

[vegginpsd]

Originally Posted by mpiller

I wish you hadn't told me there was a security wire... It didn't work so like all other things that don't work I took it apart to see what was wrong

Wait a minute, the last one I instaled had a round pump head. It did not have the four head bolts and the square pump head; which has the tinned security wire. If it has the square pump head with the tinned wire, its not gonna be pretty.

If it is the newer style round head, you might be OK.

[erbilabuc]

Are we talking about a used pump here? I had the same problem with brand new pump but just had to disconnect the output hose to get the air out of the system. No security wire on mine.

[mpiller]

Its the round head, I called them today and it's fine I just have to send it in for the warranty work. Was really hoping this was something I could fix instead of waiting to ship it and get it back but they seem to have good customer service so hopefully it will be quick. I also have to send in the warranty info first so I have to wait longer. Erbilabuc, where did you buy yours from? Mines a new pump, and I've tried disconnecting the output line and still nothing. Ive also tried the 5 gallon bucket test with regular diesel and it will barely pump the diesel out of it.

[erbilabuc]

I bought mine directly from FASS.