advise on issue with new gas shut off valve

perryjosh64 · Jul 26, 2016

Folks I recently purchased Fuel Shut Off Valve Part Number 311292WOR along with a new tank for my 64 Ford 2000 tractor. I installed it with the "O" ring but it is leaking. Am I supposed to use some type of sealant (such as Gasolia) as well or do I have a defective part?

Nordic · Jul 27, 2016

I'm not familiar with the Ford shut-off valves for gas but I assume it has pipe thread? On my tractors I use either teflon sealer or pipe thread sealer...same as for doing plumbing,
gas fitting etc. If an O-ring is meant to do the sealing there is generally some form of recess or groove to allow for it to stay put...in such instances they go on dry and usually
always seal well.

MarkB_MI · Jul 27, 2016

If it's leaking between the tank and valve, I would remove it and inspect the O-ring. It might have been pinched during installation; if it's damaged, replace it with a new O-ring. No sealant should be required.

It is not unheard of for brand-new valves to leak, are you sure it's leaking around the tank seal and it's not the valve itself that's leaking?

GVSII · Jul 27, 2016

Don't use any sealant!First:if the leak is at the mating surface between the tank and valve the "O" ring is missing,damaged or out of place.The tank surface or valve surface being warped,also a possibility.Second:if the leak is where the pintle screws in or out,remove the valve,remove the stop rivet,screw out the pintle,replace the "O"ring(make sure the interior of the valve free of debris or burrs),tap the rivet hole (10/32 as I recall)and install a screw to replace the rivet.Something else that will cause a leak is if a too long screw or bolt was used to attach the valve to the tank it will punch through the dome nut and into the tank.

advise on issue with new gas shut off valve

perryjosh64

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Nordic

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MarkB_MI

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GVSII

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