Alcance
This document specifies criteria for construction, establishes performance test methods and defines acceptance criteria for telescopic mechanical screw- and nut-type drawbar jacks and hydraulic drawbar jacks intended to be fitted on the implement tongue of interchangeable towed machinery [here after referred to as "implement(s)"] as original equipment or as replacement jacks. In addition, it specifies minimum markings and information for use to be provided by the jack manufacturer.These jacks are used specifically for— supporting the hitch points of implements during storage;— lifting and lowering of implement tongues to facilitate attaching to or disconnecting from an agricultural tractor; and— levelling an implement for stationary use.