first gear box 28 is supported above the cross bar 26 of the frame in which a housing of the gear box is fixed to the frame the first gear box includes an input shaft 30 at a forward end thereof which is suitably arranged for connection to a power take off shaft 32 of the towing vehicle an output shaft 32 of the first gear box 28 projects laterally outwardly from one side of the gear box to be oriented generally horizontally and perpendicularly to the input 30 oriented in the forward working direction the input and output shafts are geared to one another within the first gear box at a 2 to 1 ratio so that the output shaft is rotated at approximately 1080 rpm revolutions per minute when the power take off shaft 31 of the towing vehicle comprises a conventional tractor pto rotating at 540 rpm a hitch connector 34 is fixed onto the frame above the first gear box 28 for connection to the upper hitching arm of the three point hitch 22 of the towing vehicle the hitch connector 34 above the cross bar 26 and the two opposed ends of the cross bar thus form the three connection points of.