Device for adjusting a to the coupling device of a tractor, which can be ground working machine being operated with transversely extending frame

摘要

A side draft control device for wide implements automatically adjusts the implement wheels to raise the high draft side of the implement and lower the low draft side of the implement to maintain a balanced draft load on the tractor and an average working depth of the implement. The system uses lateral movement of the upper link of the tractor hitch to operate switches in the control circuits for a double solenoid valve which selectively and alternately interconnects the cylinders for the implement wheels with the tractor hydraulic pump and reservoir.