For draft control, that meant working with the stop until you found a setting that had the tool at the depth you wanted and that the tractor was happy pulling at the speed you selected. The 8N introduced position control, which is a small up/down handle under the seat on the right side-this was an improvement to the hydraulic. I think we simply left the upper stops as far up as they would go, and would adjust the lower stops so the implement did what we wanted. I think I remember that each lever had an adjustable stop both for how far down and how far up the lever went. As I recall we used that for plowing and perhaps discing as well. For instance, if the plow was suddenly harder to pull, then the hydraulics would start raising the implement out of the ground until the pulling resistance matched what it had been previously. If you were plowing and the resistance of the ground changed, the arms would shift position. The "draft" control would respond to changes in how hard the tractor was pulling against the implement. Ford 8n Draft Control Pin found in: Inner Hydraulic Lift Control Rod Pin (aka Draft Control Arm Cam Pin), Draft Control Spring Plate without Pin, 701, 740, 741. That was good for bush hogging, cultivating, spraying, anything where you wanted an implement kept a certain height above ground. The position control moved the arms to a set location and would keep them there. I don't know for sure about the MF 50, but our 155 had two levers, a "draft" control and a "Position" control.
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