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First with the plough hitched on the three point linkage adjust the top link so that the two plough bodies will plough at the same depth, if the plough wont enter the soil the top link needs shortening or if this doesnt work the soil is either too hard or the points need replacing. while ploughing check that the plough is following the tractor in a straight line and not dragging it to one side. If this happens then you will have to adjust the angle of the plough, on a conventional plough this is usually done by winding a handle to alter the position of the cranked headstock (lower link pins) on a reversible this involves moving the entire headstock one way or another. The skimmers should be set to just skim off the top inch or so of surface soil. When ploughing, the tractor wheel on one side usually runs in the furrow bottom created by the previous pass and the plough turns the soil to fill in this furrow. it is obviously necessary to make sure the plough is level while the tractor is not. On a conventional plough adjust the length of the tractors link arm rod, meanwhile a reversible plough requires that the link arms are at the same height relative to the tractor, and how perpendicular the plough is depends on the adjustable stops on the plough head stock. Ploughing with a reversible simply requires you to turn the plough over every time you turn round so that the plough turns the soil to the left or right as required, slightly quicker and rather boring. Conventional ploughing requires the field to be split into Lands, a shallow furrow is cut down the centre and then you plough down one side and up the other turning the soil towards the centre, a bit of an art form in getting the centre opening split done properly and finishing the lands. Position control - the link arms and therefore plough depth depends on the relative position of the lever. Draft Control - The tractor senses the amount of pull on the plough (through the top Link being compressed). The lever sets the level of sensitivity at which the tractor will respond. Lever right down - no response and the plough will sink to max depth. Lever right up - the plough will be lifted right up. - Some where in between and the tractor will automatically raise the plough slightly in tough going and thereby transfer weight of plough onto rear wheels increasing traction, and will lower plough in lighter going, the plough will also follow undulating terrain better. Adjust lever to keep the plough in the ground while allowing sufficient sensitivity to maintain traction.
More recent tractors will have two levers on the quadrant, the smaller one is the draft control, Fordsons however will require you to flick a lever beneath the quadrant to switch the quadrant lever between modes.
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