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Implement Alley Discussion Forum

Slant on a Horse-drawn Disc?

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CameronAaron

04-23-2008 18:28:28




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I just a bought an old riding disc harrow and everything seems to be i good shape, save for the wooden tongue and doubletree, but it has me a little perplexed. I noticed that the whole thing is slightly askew. The steel bar that holds the discs in place, that they pivot on, doesn"t sit exactly perpendicular to the tongue. I thought at first that it might just be old and bent, but on further inspection, I found that the cast iron bracket that fastens it ( and the seat) to the tongue is cast that way. If you look down on it, the whole thing looks like it"s trying to make a left-hand turn. It seems like it would throw dirt slightly to the left... This is not the case with either of my tractor-drawn discs... or any that I"ve ever seen.

Does anybody know why this would be?

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gitrib

04-24-2008 05:52:17




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 Re: Slant on a Horse-drawn Disc? in reply to CameronAaron, 04-23-2008 18:28:28  
Allan is right. on the old horse disc the slant could be set to make the disc cut. Most were made in two sections with each section throwing out. This way you could half lap and keep your field level.



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CameronAaron

04-28-2008 07:40:29




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 Re: Slant on a Horse-drawn Disc? in reply to gitrib, 04-24-2008 05:52:17  
Ya lost me. The angle of the gangs are adjustable via a lever on the tongue; but the fixed bar on which they pivot is itself cast at an angle. You can angle them to throw out or in, but they're still gonna be running at an angle...



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Allan In NE

04-24-2008 04:33:44




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 Re: Slant on a Horse-drawn Disc? in reply to CameronAaron, 04-23-2008 18:28:28  
A straight running disc doesn't cut; it just rolls alonge/rides on the surface. The angle is needed for penetration.

Back in the old days before the tandem carried wheel discs, the "transport" mode was to straighten the gangs out straight.

Allan



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Gary,kansas

04-23-2008 20:40:02




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 Re: Slant on a Horse-drawn Disc? in reply to CameronAaron, 04-23-2008 18:28:28  
If I understand you right, I wonder if it was a design effort to make it cut better.



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