This Standard sets forth the requirements for the attachment of three-point hitch implements or equipment to the rear of agricultural wheel tractors equipped with quick-attaching couplers. It is intended to establish those dimensions which are necessary to assure adequate clearance between components and to assure proper functioning of the tractor-implement combination when the implement is attached to the tractor by means of quick-attaching coupler. Design of the latching mechanism and individual components of the coupler not restricted by this Standard are left to the discretion of the manufacturer.
ANSI/ASAE S278.7-2003 history
2003ANSI/ASAE S278.7-2003 Agricultural wheeled tractors and implements - Three-point hitch couplers - Part 1: U-frame coupler (ISO11001-1:1993)