Hydraulic lifting device on a farm tractor equipped with a three-point hitch

摘要

A tractor three-point hitch comprises a power-lift featuring a cylinder accommodated in the power-lift housing and a piston movably supported in the cylinder. Inside the power-lift housing, the piston is connected to lift arms 11 which support lower links 14 via lifting rods 12 which are adjustable in length and which - at one end - are linked in bearing bosses whilst - at the other end - they are articulated to the free ends of the lifting arms. The arrangement is such that the ends of the lifting rods 12 facing the lower links 14 can be linked to fishplates 23 provided on the lower links 14 after having disengaged said bottom ends of the lifting rods from the bearing bosses 13 and after having moved the piston of the power-lift to a final position limited by a detent. IMAGE