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Allis Chalmers Discussion Forum
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Rough Running WD45

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Hedgeapple Farm

12-27-2006 08:22:00




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I just acquired a WD45 to replace my WD that I'm parting out. It was running rough and required that a constantly adjust the choke to keep it running smoothly. I replaced the plugs and regapped the points. The exhaust manifold was leaking so I replaced the gaskets. I tried it out again and it ran fine until I started working it and then I was back to working the choke to limp back to the barn. I'm thinking a carb kit might be in order. Any other thoughts or suggestions?

Scott Earlham, IA

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IBorange in TX

12-27-2006 09:27:23




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 Re: Rough Running WD45 in reply to Hedgeapple Farm, 12-27-2006 08:22:00  
I agree with Old. Check the filter bowl on the bottom of the tank for sludge. It probably will need cleaning as well. Take the drain plug out of the bottom of the carb and note if you have a good flow of gas. Let it run for several seconds to clean the bowl of the carb. Of course, you have to turn the gas on at the filter shutoff under the tank, don't forget. That will just be a bandaid for the problem. You really need to soak the carb and then put in a new kit to solve the problem. HTH
Good Luck..... .

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Hedgeapple Farm

12-27-2006 09:30:50




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 Re: Rough Running WD45 in reply to IBorange in TX, 12-27-2006 09:27:23  
I noticed there are several different carbs that were used. How do I figure out which one I have to get the right kit?



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old

12-27-2006 11:04:26




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 Re: Rough Running WD45 in reply to Hedgeapple Farm, 12-27-2006 09:30:50  
As JMS says, the tag on most is on the back side of the carb when its on the tractor and you will need to remove the carb to see the tag. Use spray carb cleaner to clean the tag off so you can read it. Don't get to ruff when cleaning the tag or you will wipe out the numbers and then you will have problem. Also if its a MS carb the kits will fit a good number of differant carbs and most of the time if you buy a kit for an MS and you asked for it by the tractor model you will probably be ok. But if its a zenith carb then it takes a differant kit.

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JMS/MN

12-27-2006 10:59:39




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 Re: Rough Running WD45 in reply to Hedgeapple Farm, 12-27-2006 09:30:50  
Normally the WD45 came with a Marvel-Schebler carburetor, TS464 series. Should be a metal tag attached to the carb with letter/numbers on it.



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old

12-27-2006 08:27:03




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 Re: Rough Running WD45 in reply to Hedgeapple Farm, 12-27-2006 08:22:00  
Haveing to choke it to keep it running says to me you have dirt.junk in the carb and it needs cleaned out good and rebuilt. Some times you can get luck and pull the drain plug and also the main jet and spray carb cleaner into the main jet and get it t run good that way but some times that doesn't work and you then will need to rebuild the carb. BTDT to many times, but when you have 30 plus tractors its a common problem

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