HYDRAULIC SYSTEM CONNECTING MACHINES AND IMPLEMENTS TO THE OUTER HYDRAULIC CIRCUIT Connecting machines and implements consisting of more parts During work with agricultural machines that consist of more parts (combinators, skids, harrows) and that have side frames hat are hinged to the central frame and during transport are folded to the vertical position by separate hydraulic cylinders controlled by the outer hydraulic circuit of the tractor, the folding of the side frames must always be controlled by the upward (backward) movement of the auxiliary distributor lever. The “lifting” branches of the cylinders must be connected to quick-couplers “2”, “4” or “6”. Connecting a rotational hydraulic motor If a rotational hydraulic motor is connected to an outer outlet of the hydraulic system, its return branch must always be connected to quick-coupler “0”. In case of connection of the filling (pressure) branch to quick-coupler 1 or 2 the hydraulic motor is protected by the kick-out function against overloading. This function interrupts the operation of the hydraulic motor at the pressure value in the filling branch of 17.5 - 1.6 MPa. Connecting a reversing hydraulic motor A reversing rotary hydraulic motor must be connected to quick-couplers “1” and “2” for functional reasons. However, relief valves must be inserted in both the branches in this case as they can reliably limit the pressure peaks during the stopping of the machine. The oil return lines from these valves are connected to quick-coupler "0".
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