What are these valves called and how do I loosen them?

[PamlicoTraveler]

These fuel valves are for selecting the fuel tank and returns. They are getting harder and harder to turn. I am not sure what they are even called.

I loosened the screw on the one on the right as pictured but that just removes the knob itself. I feel like it is requiring excessive torque to turn them now and I don't want anything to break. I sprayed some 6-56 in it but it didn't seem to help. Do I need to replace the whole valve and if so what is it called?

[steamgoat]

Try looking on McMaster-Carr for Fuel shut-off Brass Plug Valves. That company has an amazing selection of usefull items and fast shipping. Bruce.

[CharlesFCook]

Fuel Shut-Off Brass Plug Valves

[Cheechako]

Those are pretty common fuel shut off valves. Probably only run $10 or so, but I may be out of date. Not sure why they are getting hard to turn... do they get turned much? If I remember right there is some sort of packing around the shaft... I think you turn the nut around the shaft to remove it. But as said... they are fairly inexpensive... although changing may be a pain....

[tropicalescape]

Originally Posted by PamlicoTraveler

These fuel valves are for selecting the fuel tank and returns. They are getting harder and harder to turn. I am not sure what they are even called.

I loosened the screw on the one on the right as pictured but that just removes the knob itself. I feel like it is requiring excessive torque to turn them now and I don't want anything to break. I sprayed some 6-56 in it but it didn't seem to help. Do I need to replace the whole valve and if so what is it called?

Fuel valve gate?at least they all have 2 clamps,thats a good thing..

[PamlicoTraveler]

Thanks all. I think I need to look towards replacing them..

[Cheechako]

Moeller Valve....More expensive than I thought!

[Blue Stocking]

They can be dis-assembled and rebuilt. Mine have a male/female synthetic seat which compresses under the nut.
Wilcox/Crittenden IIRC

[noelex 77]

When you replace them do not use white Teflon tape on the fittings.

[Brazil]

Originally Posted by noelex 77

When you replace them do not use white Teflon tape on the fittings.

An exactlly what should we use then ?

[EddieS]

yellow teflon tape, or pipe dope.
Thanks
Ed

[noelex 77]

Originally Posted by Brazil

An exactlly what should we use then ?

The best stuff is to use one of the anaerobic sealant / glues. Try and keep it away from the end of the fittings.
I use a European product called valve cimberio (loxeal 58.11). There is some special yellow Teflon tape for fuel fittings, but most experts do not recommend it for diesel use where even a tiny partical can clog an injector.
White Teflon tape is for water fittings and is not sutable.

[sy_gilana]

Please don't change those, they are very good. You loosen the big nut and they will slack off, if not a tap from the back will loosen them.
They can be re-lapped, repaired and will last a lifetime. You should tighten the large nut until the leak just stops, then the sealing is correct, not too tight, you will hurt the cone.

[Celestialsailor]

I was just going to mention as above that those look like packing nuts under the levers. It could be that a fuel additive has caused the packing to swell a little, tightening up the throw. Try backing them off a little to see if it free's them up.

[DrivinSteve]

Originally Posted by sy_gilana

Please don't change those, they are very good. You loosen the big nut and they will slack off, if not a tap from the back will loosen them.
They can be re-lapped, repaired and will last a lifetime. You should tighten the large nut until the leak just stops, then the sealing is correct, not too tight, you will hurt the cone.

+1 on these as keepers.
The yellow tape is for propane, natural gas, acetylene, etc.