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Allis Chalmers Discussion Forum

AC B Plow mounting question

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ed in cny

09-11-2018 12:24:16

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I have a few of these plows for my B's and have always fought with the plow using it at first. Plow is shined up real good yet it still has adjustments to get it properly set in the ground and with it not to deep or to shallow. I find that sweet spot after a bunch of runs up and back making a "mess". Is there a "starting point" that one could mount the plow so it would work fairly well with out much fussing to get it to run and then fine tune it that you might suggest? Also why are there mounting holes in two spots on the front hitch plates that mounts to the wheel axle? Which one is better to use or does it matter?

I know the plow for the B & C has had it's fair share of messages over the years (some by me) but maybe I missed this mounting setup. I read through the manual and it really doesn't say "use this hole and then this will happen" kind of thing. It's not like I have a bunch of land that needs turning so the adjustments just get working well and I'm done and for the life of me I never write them down.

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09-19-2018 05:33:45

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 Re: AC B Plow mounting question in reply to ed in cny, 09-11-2018 12:24:16  
There is no magic adjustment for a B-C plow to make it work. We have plowed with our Bs and Cs for years and what you describe is typical when the plow share and/or land side and slip heal (the little cast piece at the rear of the land side) are not in tip top shape. The plow follows what A-C described as a natural line of draft. thus depth is controlled by the height of the hitching point, not by holding it with the lift or with a gauge wheel. With virtually no weight to help it in the ground the "suck" of the plowshare is critical to get it in the ground, then when it reaches a given depth the hitching causes the plow to nose up and maintain depth. They will not plow beat down ground in the middle of a July drought no matter what you do but with everything in good shape they will maintain even depth in all but the most difficult conditions. Nobody wants to spend the money and I understand that but you need a new share or somebody to redo it that knows what they are doing and make sure the slip heal is in good shape. When all is right with the plow and you are in ground that is possible for it to turn over you simply drop it in the ground, set the depth you want by raising or lowering the hitching point and drive, that's all there is to it.

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bjb in Tx from Ne

09-12-2018 11:53:01

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 Re: AC B Plow mounting question in reply to ed in cny, 09-11-2018 12:24:16  
Keep in mind the wheel axle castings are the same on both sides of the B. So the holes for the mounting of the plow on the front of of the castings are the same layout for the holes that mount the regular drawbar on the rear of the casting. The three holes (at least on my B) are to adjust the height of the regular drawbar. Since the plow drawbar pivots very closely to these holes, I don't see these holes affecting the adjustments as much as the plow drawbar lever.

Are your plow wear parts in good working order? If they are worn, the plow may not do a good job no matter how well it is adjusted. My two way plow has only been used a few hundred feet while I play, and are mostly for show, so I have not had the chance to play with the adjustments on a large stretch of land. Detailed Pictures of my plows mounted should be in the archives somewhere if you search for my "handle".

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09-11-2018 13:01:47

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 Re: AC B Plow mounting question in reply to ed in cny, 09-11-2018 12:24:16  
When I mount a plow on a tractor I run the left side tires up on 6" blocking then set the plow so it is running straight with the tractor and level and tip slightly forward it should be close. Randy

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bjb in Tx from Ne

09-12-2018 11:56:13

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 Re: AC B Plow mounting question in reply to dahlin, 09-11-2018 13:01:47  
If I recall correctly on my plow, the plow sorta floats when it is down, there is no real adjustment for the angle like you are describing, which makes having the wear parts in good condition even more important.

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