856 Fuel tank valve leak question

[FLtractor 105]

Evening,

 

I put a brand new L shaped Fuel valve on bottom of my 856 factory fuel tank.. it no longer leaks near what old valve did but the metal nipple nest hose will be wet with fuel.. not dripping, just wet valve outside.. any suggestions on a grommet or gasket around the valve inside tank to help stop said leaking? Should tank valve be all the way open when running driving tractor? Or just certian # of quarter, half, full turns? 

Edited Saturday at 10:49 PM by FLtractor

[ri702bill 10,868]

Did you use any fuel resistant sealer on the threads?? I prefer Permatex #2.

Opening about 2-1/2 turns should be fine. As I recall - not all valves have a built-in stop to prevent you from removing the stem entirely - by accident!

 

[sqrlgtr 1,644]

I use gas resistant Teflon tape, available at auto parts store and usually yellow in color. Just have to be careful and not contaminate fuel line with it. I'm not really following where your leak is, got any pics.

[Achto 30,367]

I have switched to using anaerobic sealant on threaded fuel & oil fittings. I've had much better luck with it.

 

 

[FLtractor 105]

No did not use any sealant or tape on the threads when I installed it. No current pictures. So between Teflon, permatex 2 and anaerobic sealer recommendations.. any one stand out as better performing for leak stoppage or all the same result just pick your favorite ? 

Edited yesterday at 02:42 AM by FLtractor

[kpinnc 16,397]

2 hours ago, FLtractor said:

So between Teflon, permatex 2 and anaerobic sealer recommendations.. any one stand out as better performing for leak stoppage or all the same result just pick your favorite ? 

 

As a rule I prefer not to use tape on anything that carries oil, but I have used it in fuel lines. Just be sure to allow a thread or two at the edge to be free of tape just to keep it out of the system. 

 

Liquid sealers work best in my opinion, but the same rule applies to keep it out of the tip so if doesn't get into the lines.