This specification sets forth requirements for the attachment of three-point hitch implements or equipment to the rear of agricultural wheeled tractors by means of a three-point free-link in association with a power lift. In order to assure proper performance of certain implements@ standard dimensions for mast height@ mast pitch adjustment@ and implement leveling adjustment are included. Location of link attachment points is not restricted and is@ therefore@ left to the discretion of the tractor designer. If draft links are used for trailing power take-off implements@ a means shall be included for locking the draft links in a fixed position@ and a draw-bar hitch point shall be positioned in conformance with power take-off standards.