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Allis Chalmers Discussion Forum
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Stalling WD

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C. Roche

03-20-2004 02:27:53




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My WD will start but then stalls. When it stalls it is as if it is running out of gas. I've disconnected the fuel line at the carb and there is a flow of gas. I've dropped the sediment bulb and there is gas flow there. After it dies it will not start again until it has set for sometime, sometimes overnight.
When I try to start it after it stalls there is what appears to be an overflow from the carb.
I've pulled the plugs and they are not wet, as I would have expected. Since this tractor doesn't have a fuel pump I'm wondering how the system works. BTW, I am not certain what a good starting point for the number of turns on the set screws might be.
Any help? If this doesn't get fixed soon I'm trading for a Ford!

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C.Roche

04-06-2004 05:29:47




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 Re: Stalling WD in reply to C. Roche, 03-20-2004 02:27:53  
Mystery solved. Seems the after-market on/off switch had an intermittent short. Replaced it and everything is A-OK now....at least till the next time.



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C. Roche

03-22-2004 04:19:02




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 Re: Stalling WD in reply to C. Roche, 03-20-2004 02:27:53  
I think I cured my problem. I'm selling the WD to a "friend" for $750. That includes the front mounted scoop. I'm only losing about $800 on the deal, but the elimination of the aggravation makes it seem worth it. I do kinda hate losing a friend this way thought. :-)



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dodgeboy

03-20-2004 19:39:18




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 Re: Stalling WD in reply to C. Roche, 03-20-2004 02:27:53  
i agree, people are barking up the wrong tree.
It sounds like an overheated ignition to me. I have a Wd and it starts within 2 revs.,summer or winter. It sounds like an electrical comp overheating and then cooling down and working again. Coil , condenser. Ray



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Pat Cruise

03-20-2004 18:20:14




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 Re: Stalling WD in reply to C. Roche, 03-20-2004 02:27:53  
Sounds to me like you are looking in the wrong place.Does your tractor have a distributor or mag?What I suspect is you have an ignition component such as a condenser or possibly a coil breaking down after initial startup.I have a 1950 WD that I have had for over ten years.One time in the middle of a pull it picked up a slight miss then died.Replacing the coil did the trick.Also having been a small engine mechanic for over 15 years I have seen a lot of engines with the same problem and the first thing I check is that all ignition components are functioning.My WD will start in any temp.with minimal to no choke and no throttle at all.I gnition components in proper working order will give you this result.Hope this helps!!!

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wdTom

03-20-2004 18:11:01




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 Re: Stalling WD in reply to C. Roche, 03-20-2004 02:27:53  
Make sure your cas cap is venting.



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C. Roche

03-20-2004 17:01:32




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 Re: Stalling WD in reply to C. Roche, 03-20-2004 02:27:53  
Thanks to all who responded.
As to the stuck float possibility, I have pulled the carb and the bowl is full of fuel. Checked and its free and so I don't think its "sinking" and allowing it to flood.
I wonder, since there is no fuel pump, if there is an air leak at the intake manifold, would that result in it not pulling fuel into the intake valves?

Thanks again to all.



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Don Holden

03-20-2004 16:15:37




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 Re: Stalling WD in reply to C. Roche, 03-20-2004 02:27:53  
Try this! Once the WD starts tap the carburetor with a light hammer or similar knocker to free up a potentially stuck float in the carb! My D17 used to drive me nuts with the same problem. I removed the drain plug and found no fuel in the carburetor but had fuel in the line to the carb. A couple of love taps with the knocker to free up the sticking float and lo & behold a fine stream of fuel commenced to exit the drain plug and the problem identified, and then much easier to fix!!

The Old Guy

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Dave K

03-20-2004 14:10:09




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 Re: Stalling WD in reply to C. Roche, 03-20-2004 02:27:53  
Well, if you are getting gas to the carb, are you getting gas inside the carb? Open the carb bowl drain and you should get a good flow there. If not your float is probably sticking, not uncommon. Carb rebuild kit is about $30 with easy to follow instructions and how to set up your needle valves. BTW I have used WD' since they came out in 1948 and never had one hard to start if maintained correctly. As old as they are now you may have bad manifold gaskets also, causing problems.

Dave

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pat

03-20-2004 06:29:01




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 Re: Stalling WD in reply to C. Roche, 03-20-2004 02:27:53  
I had the same problem. Mine turned out to be a piece of paint about 1/2 by 1 inch floating in the gas tank. It drove me crazy. Engine would stall, I would check and have fuel flow and it would start. Then 5 minutes, one hour, or even a week later, it would happen again. I suspected that was the problem, carried a stick with me, and when it started to die, i quickly stirred the gas and it kept running. took off the tank and flushed it out and no more trouble.

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JF

03-20-2004 05:50:39




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 Re: Stalling WD in reply to C. Roche, 03-20-2004 02:27:53  
Is the fuel line completly free,Or is it constricted from the old fuel hardening.Dont know how to spell the word im wanting to use. LOL
This happened to me and just replaced the line and it worked.



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Tom Davison (PA)

03-21-2004 09:33:14




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 Re: Re: Stalling WD in reply to JF , 03-20-2004 05:50:39  
I had the same problem with a 1939 B. I had installed a new carbuerator. The float valve sticks and it runs out of fuel. I had that carb off many times. An old AC fieldman told me the new float valves with the rubber tips is the cause of the problem. I used to turn off the fuel as the carb would sometimes run over. I quit turning
off the fuel and now have no problems. I think the float valve dries out with the fuel turned off, and then sticks closed.
My .02 worth Tom Davison

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Brian G. NY

03-20-2004 06:37:25




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 Re: Re: Stalling WD in reply to JF , 03-20-2004 05:50:39  
I have a couple od WD-45s and a WD. The WD is much more tricky to start than the other two. To start it (even in the coldest of weather) I must just "crack" the throttle and (without choking) start it. I have to be ready to "feather" the choke as soon as it starts to keep it running. I have to also "feather" the choke as I release the clutch until it warms up a bit. If it stalls at first start up, I have to push the throttle all the way up (closed), start it and gradually up the throttle as I "feather" the choke. I have found over 50 years of operating carbureted gasoline powered vehicles, that many have their own little intricasies or "personalities". When I set the jets on these carbs initially, I usually start at about 1-1/2 turns. I also open the main jet about a qtr. turn more in the winter so it's a little less "cold blooded".

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