A system for controlling a three point hitch of an agricultural tractor , the system comprising: at least one automatic lower link stabilizer connected to at least one lower link of the three point hitch for selectively stabilizing the three point hitch against lateral movement when in a rigid mode, and for selectively allowing lateral movement of the three point hitch when in a float mode; a controller connected to the at least one automatic lower link stabilizer for controlling the selection of the rigid mode or the float mode of the at least one automatic lower link stabilizer ; and at least one external switch connected to the controller for use by an operator to raise or lower the three point hitch from a position adjacent to the agricultural tractor ; wherein the controller is provided with control logic operable to receive input from said at least one external switch and characterized in that the control logic is operable to interrupt raising the three point hitch when said three point hitch is being raised in response to said at least one external switch , when the three point hitch is raised to a position corresponding to a rigid mode transition threshold value , and when the at least one automatic lower link stabilizer is in the float mode; and said control logic being further operable to place the at least one automatic lower link stabilizer in the rigid mode and to allow raising of the three point hitch to resume beyond the position corresponding to said rigid mode transition threshold value only upon release of the at least one external switch and re-initiation of the upward motion of the three point hitch by the operator using the at least one external switch . at least one automatic lower link stabilizer connected to at least one lower link of the three point hitch for selectively stabilizing the three point hitch against lateral movement when in a rigid mode, and for selectively allowing lateral movement of the three point hitch when in a float mode; a controller connected to the at least one automatic lower link stabilizer for controlling the selection of the rigid mode or the float mode of the at least one automatic lower link stabilizer ; and at least one external switch connected to the controller for use by an operator to raise or lower the three point hitch from a position adjacent to the agricultural tractor ; wherein the controller is provided with control logic operable to receive input from said at least one external switch and characterized in that the control logic is operable to interrupt raising the three point hitch when said three point hitch is being raised in response to said at least one external switch , when the three point hitch is raised to a position corresponding to a rigid mode transition threshold value , and when the at least one automatic lower link stabilizer is in the float mode; and said control logic being further operable to place the at least one automatic lower link stabilizer in the rigid mode and to allow raising of the three point hitch to resume beyond the position corresponding to said rigid mode transition threshold value only upon release of the at least one external switch and re-initiation of the upward motion of the three point hitch by the operator using the at least one external switch . <EOS>