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Allis Chalmers Discussion Forum

AC B disc missing parts?

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02-20-2004 18:35:53

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I recently purchased a 6ft disc that was made for the model B. However, I noticed that the parts that shave the dirt off of the discs are missing. I am sure these have a name, but I am new to this. The steel posts with a spring and cotter pin hole that these attach to are in place, but the part that shaves the dirt is missing. Is it necessary to have these parts on the disc? If so, where can I purchase them and how much would they cost? Thanks in advance for your help. Tom

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Rod (NH)

02-21-2004 08:21:01

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 Re: AC B disc missing parts? in reply to Tom, 02-20-2004 18:35:53  
Hi Tom,

I believe you have the AC #9 Tractor Disc Harrow:

third party image

If so, that part is called a "scraper blade" and is AC part #300238. They are just flat pieces of sheet steel so they would be easy to make or have made. If you want to pursue something like that, let me know. I would be willing to pull one of mine and make a tracing for you to use as a pattern.

third party image Rod

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02-21-2004 11:59:52

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 Re: Re: AC B disc missing parts? in reply to Rod (NH), 02-21-2004 08:21:01  

I really appreciate the offer! It sounds like I will not be able to purchase these parts any longer and trying to find a full set from a salvage yard would be next to impossible. It would help me out a lot if it is not too much trouble to draw up that diagram. Thanks again! Tom

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Rod (NH)

02-21-2004 15:47:56

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 Re: Re: Re: AC B disc missing parts? in reply to Tom, 02-21-2004 11:59:52  

It was easier than I thought. For a .pdf file go here. You should print it out on standard 8.5x11 paper. Make sure that "fit to page" is unchecked in Adobe's print dialog box. That should give you a full size tracing that you can use as a template. I'll leave the file up on my site for a while so you will have an opportunity to grab it. If you have trouble with getting the Adobe reader to come up automatically in your browser, just right-click on the link above and use "save target as" to save the pdf file to your hard drive and open it from there.

Ten gage sheet steel is a common thickness. If you can find someone with a plasma cutter making 24 of 'em would not be a big deal; especially if you make a hard template for the hand torch to follow. You would need to know the dimensions of the actual torch to allow for the tip thickness in a hard template. A more sophisticated shop might be able to use mechanized equipment.

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02-21-2004 17:37:20

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 Re: Re: Re: Re: AC B disc missing parts? in reply to Rod (NH), 02-21-2004 15:47:56  

Thanks a million! You have answered a ton of my questions and have been a tremendous help on this site. Do these scraper blades attach to the posts with a cotter pin? Thanks again! Tom

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Rod (NH)

02-21-2004 18:23:59

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 Re: Re: Re: Re: Re: AC B disc missing parts? in reply to Tom, 02-21-2004 17:37:20  
They attach to the brackets with a 3/8" dia x 1-1/8" long rivet, plus a compression spring that is 1/2" ID x 1/2" long. There is a 1/8" dia cotter pin through the end of the rivet to keep it in place. The cotter pin does not show in this picture:

third party image

Right-click and save the picture if you want. Let me know after you have it and the pdf file so I can delete from my site to save space.

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02-22-2004 05:45:55

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 Re: Re: Re: Re: Re: Re: AC B disc missing parts? in reply to Rod (NH), 02-21-2004 18:23:59  

I have both diagrams printed out. Thanks again!


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Rod (NH)

02-21-2004 12:19:58

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 Re: Re: Re: AC B disc missing parts? in reply to Tom, 02-21-2004 11:59:52  
Sure, I'll see if I can't get that in the next day or so. I'll post back here with it.

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02-20-2004 20:22:18

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 Re: AC B disc missing parts? in reply to Tom, 02-20-2004 18:35:53  
Those are scrapers or at least that is what we call them around here. Yes they are necessary, in damp ground dirt will build up between the disc and they will not be able to cut into the ground. In my opinion you really do not need to be trying to disc when it is too wet but sometimes you need to so the ground will dry faster. It will not be much of a problem in dry ground. Overall it will be a lot less headache with them on. New scrapers are available just not sure if you can find ones that fit or not. You may have to look in salvage yards or try to find ones that with a little work can be made to fit.

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