[Andr3w]

Hi,

I just found out that fluid is not going through my pump, but i can still hear the motor turning. I have been using 100% methanol. Could it be that i need a new valve assembly?

I tried using pure water and new piping, but the water level didn't go down any. Also tried cleaning out the valve assembly, but that didnt help anything.

Any suggestions?


Thanks,
Andrew

[Dust]

Is it primed? I don't know, but you may have to suck some fluid through it to get it primed. Not speaking from experience on this though.

[Andr3w]

ill give that a try.

[Andr3w]

no luck. i couldnt even suck water through. i put the outlet tube under water, and bubbles blew out. Also i just noticed that when i complete the circuit, it will not start all the time. Same result with hooking the pump motor up bypassing the switch. Could my pump be starting to die?

[dvldoc]

Sounds like a seal, email your purchase order and we can do a return. The pump has a 1 year warranty.

[gnxclone]

I recently ran into a situation like this. I thought my pump was toast. As it turned out, when the pump INLET side needs to be reprimed, it won't do so unless the OUTLET side is unrestricted by the check valve/nozzle.

Before figuring this out, I went as far as removing the pump to bench test it, and when I did test it, it primed perfectly. I reinstalled it and it wouldn't prime again. Then I opened up the outlet just before the check valve and it primed instantly.

I'm sure it's a case of the pump not having enough force to crack the check valve when it's just pumping air. Since the CV doesn't crack, there's no flow. Since there's no flow, it won't prime.

No problems since learning this the hard way.

[dvldoc]

You always have to prime the pump prior to installing the check valve or it will not prime because it cannot push air at a pressure high enough to do so.

This is a common thing people run into and think the pump is bad.

[Ondonti]

Is it possible to buy a new seal?
You sent me a new valve and I opened up the pump and realized that I didnt have a seal for the valve. Now is leaking (or maybe it was before) at the housing. It doesnt leak unless there is a little pressure, like right when the pump shuts off sending a couple drips out. Right now its obviously sucking air from around the housing instead of liquid from the tank.

The new diaphragm worked perfectly. Even though it looked the same as the e85 destroyed one, it seals.

Or can I ghetto goop/rtv a tiny amount around the top of the seal on the valves.

This is probably why when I was testing for leaks, the nozzles would sometimes sputter, and when I was running water out the pump it was coming out frothy. I didn't realize till writing this post that the froth is the same problem.

[Ondonti]

Pumps > Replacement Parts > Parts > Pump Diaphragm Kit : Grainger Industrial Supply

Will that part solve the problem and is it 100% meth compatible?

[dvldoc]

E85 pretty much ruins the pump, gas screws up the valves and seals and can get down into the motor from the leaks, remember were talking about a good bit of pressure.

That kit would work but it's not EPDM/Nylon so 50/50 would be your limit. And is the manufactures recommended limit. You can use or seals with that outer mounting ring. Or use some Black RTV silicon adhesive to seal up the assembly and call it a day.