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Competition Ploughing
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<blockquote data-quote="Howard150" data-source="post: 6925018" data-attributes="member: 30002"><p>As said earlier in this post you can get too much of a good thing. In real terms the least you can get realistically is 25mm. On an 86 the least you can get by welding a slip on the top is about 52 which is far far too much to plough with. Fine for the first run to get the front body up out of the way but that's all.</p><p></p><p>The logic behind lifting legs is to keep the plough frame closer to the transverse angle of the frame during normal ploughing whilst ploughing two different depth furrows. The mechanics of this means that the boards maintain a similar pressure on the furrows throughout the plot. The big thing to remember here is that there are two adjustments on a mounted plough that control the relative depth of the front and back furrows. The levelling box and the top link. These both still come into play even more so if you lift the leg. What this means is that most folk simply use the levelling box to control the differing depth the two bodies plough at. Having lifted the front leg /lowered the back leg, when ploughing shallow the body ploughing deepest will dominate. You are already ploughing down wing and any attempt to deepen the front body with the levelling box will result in (worst case scenario)the plough riding out and running off to land.</p><p></p><p>I still think the best finishes are got when you can lift the front leg by the prescribed amount. It allows for more meat in the sole furrow. Again it can be problematic, mainly in that the back mouldboard can be fighting unploughed ground which was underneath the front furrow.</p><p></p><p>Hope this helps.</p></blockquote><p></p>
[QUOTE="Howard150, post: 6925018, member: 30002"] As said earlier in this post you can get too much of a good thing. In real terms the least you can get realistically is 25mm. On an 86 the least you can get by welding a slip on the top is about 52 which is far far too much to plough with. Fine for the first run to get the front body up out of the way but that's all. The logic behind lifting legs is to keep the plough frame closer to the transverse angle of the frame during normal ploughing whilst ploughing two different depth furrows. The mechanics of this means that the boards maintain a similar pressure on the furrows throughout the plot. The big thing to remember here is that there are two adjustments on a mounted plough that control the relative depth of the front and back furrows. The levelling box and the top link. These both still come into play even more so if you lift the leg. What this means is that most folk simply use the levelling box to control the differing depth the two bodies plough at. Having lifted the front leg /lowered the back leg, when ploughing shallow the body ploughing deepest will dominate. You are already ploughing down wing and any attempt to deepen the front body with the levelling box will result in (worst case scenario)the plough riding out and running off to land. I still think the best finishes are got when you can lift the front leg by the prescribed amount. It allows for more meat in the sole furrow. Again it can be problematic, mainly in that the back mouldboard can be fighting unploughed ground which was underneath the front furrow. Hope this helps. [/QUOTE]
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