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Allis Chalmers Discussion Forum
Show Parts for Model:

WD won't stay running

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TSWolf

04-17-2014 13:20:56
173.50.209.19



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Last week, I bought a WD that had been sitting a few years. I basically rebuilt the ignition system (new plugs, wires, rotor, cap, points, condenser, coil). Also, I put new manifold gaskets on, as the old ones were leaking, so it was not creating vacuum through the carb.Now that that is all taken care of, when I try to fire up the tractor, it will only start if I put my hand over the intake of the carb, and will then only run for a few seconds and die. I did clean out the carb and put new gaskets and a needle and seat in it. I know it is getting fuel to it, when I pull the plug on the bottom fuel runs out in a steady stream. Has anyone else had this problem, or know what it could be?

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TSWolf

04-18-2014 12:52:29
173.50.221.186



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 Re: WD won't stay running in reply to TSWolf, 04-17-2014 13:20:56  
I know the ignition switch is not the problem, as I just replaced it (and the tractor is getting spark). I also took the carb apart and cleaned it, and the main jet is not clogged up. I will try adjusting the float this weekend and see if that helps anything. Is there anything else I should check while in the carb? It is a marvel-schebler.



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bjb in Tx from Ne

04-18-2014 05:11:58
147.1.234.163



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 Re: WD won't stay running in reply to TSWolf, 04-17-2014 13:20:56  
Did you tear apart the carb completely? Sounds like the main jet is plugged. I have had an 8N ford and my honda motor on my tiller behave the same way. In both cases the main jet was plugged. On a zeinth carb, remove the needle or cap on the bottom left of the carb (mounted position) and the main jet can then be unscrewed. I usually use fishing line or plastic string trimmer line to clean the jets out.

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bjb in Tx from Ne

04-18-2014 05:15:24
147.1.234.163



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 Re: WD won't stay running in reply to bjb in Tx from Ne, 04-18-2014 05:11:58  
Be sure in the future shut the fuel off and let the engine use up all the fuel in the carb to prevent the jets from plugging.



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BushogPapa

04-18-2014 03:21:45
173.88.50.145



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 Re: WD won't stay running in reply to TSWolf, 04-17-2014 13:20:56  
It must have a Distributor ( Battery Ignition).

Try bypassing the ignition switch..it may be that switch is bad..

You are aware of the typical "Cold-Nature" of an Allis..? They often do need a quick hand on the Choke, until they warm up a little..

Ron.



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BushogPapa

04-17-2014 20:39:10
173.88.50.145



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 Re: WD won't stay running in reply to TSWolf, 04-17-2014 13:20:56  
While you are checking the Float, double check the bottom passage that flows fuel to the "Power Screw".

That passage accumulates find sediment and can be blocked. You can un-screw the Power Screw (take it out) and tease a wire up into it, with the fuel on and get it fairly well open (if fuel flows)..

Ron.



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TSWolf

04-17-2014 17:46:39
173.50.209.19



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 Re: WD won't stay running in reply to TSWolf, 04-17-2014 13:20:56  
I will check the float. I also wanted to add that if I just use the choke on the tractor, it does not help. It only works if I completely choke it out by hand.



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kub6040

04-17-2014 19:41:56
54.193.151.198



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 Re: WD won't stay running in reply to TSWolf, 04-17-2014 17:46:39  
I have had a few red tractors with warped manifolds , they won't seal!!!



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soundguy

04-17-2014 17:00:35
207.30.46.70



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 Re: WD won't stay running in reply to TSWolf, 04-17-2014 13:20:56  
When you have good spark but start and quick stalls, and choke helps some, check fuel delivery, may be stuck or heavy float or clogged fuel tap, screens, line, etc



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Dirt

04-17-2014 14:08:42
75.148.34.117



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 Re: WD won't stay running in reply to TSWolf, 04-17-2014 13:20:56  
Is the float leval set right



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