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Allis Chalmers Discussion Forum

wd-45 stalls under any load

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01-20-2011 17:15:25

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My wd-45 has started stalling under any kind of load. It coughs, sputters even if you try to move it. I put a new load valve in it because I had one and checked the gas flow to the carb. Lots of gas. It all seemed to start last week when the float was letting gas pour out of the carb. you have to choke it when it starts to stall and it will be good for a short time. The carb was rebuilt last year and seemed to be fine. I am going to blow out the carb. I would appreciated any other suggestions as it is 2 hours from my house. Mike

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01-29-2011 16:12:13

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 Re: wd-45 stalls under any load in reply to mdm1, 01-20-2011 17:15:25  
I finally got to my cabin to work on my wd-45. After draining the gas tank(the tank was perfect) pulling the sediment bowl assembly and installing the screen I fired it up. I did replace the float, needle valve and seat. Cleaned the carb. The tractor ran terrible, like it was getting to much gas, could not adjust the carb at all. Shut it off and gas poring out the carb. I took it apart a couple of times and checked the float level and reset the needle valve. Same problem gas poured out. Finally I bent the float for more than 1/4 space and it seemed to work. Plowed snow for an hour. This has happened before, the gas pouring out. I hope it is fixed now but if anyone has a better idea pass it on please. Thanks again for all the help and suggestions. Mike

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01-21-2011 13:41:28

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 Re: wd-45 stalls under any load in reply to Clay in MI, 01-20-2011 17:15:25  
Quoting Removed, click Modern View to see

If all of that new stuff doesn't cure it, you need a new ignition coil.

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01-21-2011 06:34:49

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 Re: wd-45 stalls under any load in reply to mdm1, 01-20-2011 17:15:25  
condenser, if not coil...

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01-20-2011 18:36:47

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 Re: wd-45 stalls under any load in reply to mdm1, 01-20-2011 17:15:25  
Many thing could be wrong with it. But I would start by checking the air cleaner and make sure it is not full of ice etc. The it is has a carb like my WD45 pull the complete main jet unit or and make sure you get a good flow of gas there and clean the adjustment part of it. Doesn't take much to clog up a main jet and it is also pretty easy to clean it out if you do as I said

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01-21-2011 02:27:59

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 Re: wd-45 stalls under any load in reply to old, 01-20-2011 18:36:47  
My air cleaner is fine, no ice in the sediment bowl. I am running no ethanol fuel with gas line anti freeze but I think I have a problem in the tank as it would sometimes do the same thing going up a hill. I am going to take apart the carb and clean everything today. One thing when I split the carb I noticed one side of the float was pushed in like a big dent. Mike

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01-21-2011 08:35:52

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 Re: wd-45 stalls under any load in reply to mdm1, 01-21-2011 02:27:59  
Pull the float out and shack it. If it has a rattle sound it is bad. And/or Take the float and put t in a can of gas and weght it down and let it sit in that fr a few hours then shake it and see if it rattles. I'll bet it has a hoe in it or is bent so it does not move freely in the carb. If it was me I would replace the foat no question asked

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01-21-2011 06:08:42

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 Re: wd-45 stalls under any load in reply to mdm1, 01-21-2011 02:27:59  
sounds like alittle water in carb an froze, replace the float for sure.

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01-20-2011 18:07:15

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 Re: wd-45 stalls under any load in reply to mdm1, 01-20-2011 17:15:25  
When you sayd "lots of gas to the carb" do you mean that gas comes out from the fuel line when you unscrew it from the carb? If so, the fuel still has to go through the viton float valve/needle area. I had a similar problem a few weeks ago. My carb wouldn"t stop the flow of gas going to the carb, and after running for 30 seconds or so it would get sluggish and black smoke would come out the exhaust. I would quickly shut off the fuel supply at the sediment bowl, and the engine would run normally (until it ran out of gas in the carb bowl). I ended up putting in a new float, and a new float valve/needle/gasket. It solved the problem for me.

Oh, could you possibly have water in your gas? If you have ethanol blended gas, the water can build up in your fuel system.

Also, check to make sure your air filter is clean. Try running it briefly with no filter.

Another problem I had is when I put on a new gas tank cap that I bought from Autozone. It seals the hole real good. Really really good. So good that it is airtight and the engine won"t run after a few minutes because of the vaccuum in the gas tank. I have to loosen the gas tank cap so that it isn"t air tight.

You might also want to check the condition of the distributor/rotor.

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01-21-2011 13:16:41

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 Re: wd-45 stalls under any load in reply to paulinkansas, 01-20-2011 18:07:15  
Here is what I am going to do! Ordered a new float(although I think mine is still good, held under water for 6hrs no rattle) New float needle valve and seat and tune up kit. Also I found a elbow that has a screen on it to replace the one for the fuel line at carb. I hope I can convert it to work on mine. And I am going to run a copper tube about an inch into the gas tank for now. I soaked the carb in cleaner and blew everything out. It was quite clean inside. It will be a week before I get back to my tractor. I will let all know the outcome! Thanks for all the suggestions. Mike

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01-22-2011 10:29:27

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 Re: wd-45 stalls under any load in reply to mdm1, 01-21-2011 13:16:41  
Can you open the power screw, with the engine running half-throttle or more and get the exhaust to smoke black smoke..?? Are you setting the power screw too lean..?

If so, you are able to get enough fuel..

Weak ignition can cause your problem too..


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