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Fuel Shut Off Valve
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Tommy D.

04-03-2000 08:28:04




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Ok, apparently it is a given that the Zenith fuel shutoff valves are going to screw up in the first year after installation. (53 thru 64 models) Does anyone have a solution so I don't have to give my meager wages to the NH dealer for a new valve twice a year? Not to mention my religion is suffering from having to replace them.
I know the fuel line is terribly close to the exhaust manifold, and rigging fuel lines is a no-no, but what can be done? Also, I replaced mine about 2 months ago, and it is leaking already! Should I take it back to the dealer & get another one?

Anyone with guidance is eagerly awaited.....

Thanks,
Tommy D.

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How Did U Get It Apart

04-04-2000 06:08:35




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 Re: Fuel Shut Off Valve - Need Solution in reply to Tommy D., 04-03-2000 08:28:04  
Mark,

Sure would like to know how you got it apart & back together and functional.

Also, I have some silicone o-rings made for use on high O2 content scuba bottles (nitrox). Wonder if one of these would work better?

Thanks!
Tommy D...



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Mark B (PA)

04-04-2000 16:17:39




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 Re: Re: Fuel Shut Off Valve - Need Solution in reply to How Did U Get It Apart, 04-04-2000 06:08:35  
On the bottom of the valve is a little chrome "button". I drilled it out, it is a pressed in pin that keeps the threaded part from screwing all the way out and really making a mess. With this pin drilled out, the valve screws all the way out, revealing the rotted remains of the o ring. It really isn't an o ring per se, it is flatter and wider than a normal o ring. I installed a normal o ring in the slot ( I think it's a #3). I will reassemble, but will have to make a pin and JB Weld it in to keep the valve from screwing back out. I will test this out and post the results. If it works, I will try to come up with an alternative to the JB weld so ..... ... the damn thing would be rebuildable! I don't know if this o ring or the silicone ones you mentioned will hold up to the fuel or not. But the way I see it, I got nothing to lose by experimenting.

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Roger in SEMO

04-05-2000 05:50:32




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 Re: Re: Re: Fuel Shut Off Valve - Need Solution in reply to Mark B (PA), 04-04-2000 16:17:39  
Thats what I did to mine. I threaded the hole, put a small machine screw in it, then sealed it with Permatex. Works fine and dosn't leak.



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Mark B (PA)

04-05-2000 16:13:45




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 Re: Re: Re: Re: Fuel Shut Off Valve - Need Solution in reply to Roger in SEMO, 04-05-2000 05:50:32  
Where have you been ? We've been agonizing over how to rebuild these things and how to do it and here you've already done it. Please post all the details. What size o ring? How long has it went without leaking? Anything special about the o ring you used? Let us know!!



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Roger in SEMO

04-06-2000 13:07:42




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 Re: Re: Re: Re: Re: Fuel Shut Off Valve - Need Solution in reply to Mark B (PA), 04-05-2000 16:13:45  
Just got an o ring from the plumbing junk box under my workbench. I might start leaking today, but so far it's been two years. Sorry it took so long to post. I have to do this at work.



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Mark B (PA) Rebuild is a success!!

04-06-2000 13:20:53




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 Re: Re: Re: Re: Re: Re: Fuel Shut Off Valve - Need Solution in reply to Roger in SEMO, 04-06-2000 13:07:42  
Roger - Put in the o-ring, did the machine screw/sealer and installed. NO LEAKS!!. I have turned it on and off several times and still no leaks. Although it's only been 24 hours I am encouraged yours has held on for 2 years. Thanks for the insight.If anyone buys a new Zenith valve, just rebuild it to begin with and save yourself the hassle of doing it later.



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Tony Jacobs

04-03-2000 19:41:07




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 Re: Fuel Shut Off Valve - Need Solution in reply to Tommy D., 04-03-2000 08:28:04  
Tommy D. That is a question That I have asked myself many times even at the parts dept of the New Holland dealers where I buy most of my parts, and so far no one has come up with a good answer not even myself. I replaced SIX VALVES on the same tractor for a customer of mine last summer, talk about losing faith in O.E.M. parts, it's been almost six months now and number seven has not leaked yet, I probably should not have said anything because he will probably call to tell me that it leaking again. Thanks Tony Jacobs

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Dissected fuel valve results - Mark B(PA)

04-03-2000 17:46:25




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 Re: Fuel Shut Off Valve - Need Solution in reply to Tommy D., 04-03-2000 08:28:04  
Went out to the shop and dissected both leaky Zeniths. Cause of death was the same: O-ring turned to mush. Funny how a piece of neoprene fuel line will last for years (Although it is much thicker than the o ring) while the zenith o rings can't make it out of the chute. Planned obsolescence or just a bad batch of o rings? I am going to try to find a replacement o ring and rebuild the valve, will test it out and let you know the outcome. In the meantime, does anyone know how to contact the Zenith Co? If I were in their shoes, the products liability connected with defective fuel valves would be very frightening. I would think they can issue a recall or offer an improved replacement valve if they had the consumer at heart.

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Tommy D.

04-04-2000 06:05:25




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 Re: Re: Fuel Shut Off Valve - Need Solution in reply to Dissected fuel valve results - Mark B(PA), 04-03-2000 17:46:25  
I agree with the liability statement. Could also open up FNH to law suits as well. I would think FNH would press the issue before someone (especially me) gets burned (literally) by these faulty o-rings. Also, who was the brain surgeon at Zenith that made these not servicable? Like to get my hands on him..... ..

Wonder if Zenith is still around?

More thoughts.....
Tommy D...



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rafael cocotle ronzon

01-14-2002 07:35:25




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 Re: Re: Re: Fuel Shut Off Valve - Need Solution in reply to Tommy D., 04-04-2000 06:05:25  
12" diameter unidirectional flow valve, back pressure regulator (1.5 Kg/cm2 back operation pressure), fast response, 4 psi of maximum drop pressure at 22,000 bph. plug type disc (316 ss), spring actuator. 150 ansi rf flange. Body of A216 WCB.



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MarkB(PA)

04-03-2000 16:45:15




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 Re: Fuel Shut Off Valve - Need Solution in reply to Tommy D., 04-03-2000 08:28:04  
Tommy, reading your post gave me deja vu all over again. 2 Zenith valves have leaked from new for me, the last one just weepy enough to keep going and then sprung a major leak when my tractor was in storage. I was not amused, especially when faced with the prospect of shelling out more money for yet another piece of crap. I'm going to dissect one of these suckers and see if I can figure out a fix. In the meantime, you have my sympathy. Sure hope one of these folks that work for the CNH dealers can have mercy on us and let us in on an alternative. I can't believe people put up with this quality problem. The Zenith folks must be laughing all the way to the bank!

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