This upper cover is a structural component for the disc harrow frame assembly. It mounts over the top of the frame section and is secured using four fasteners that pass through the pre-drilled holes. The cover protects the frame tube from debris ingress and helps maintain the structural integrity of the hitch or linkage connection point. A worn or missing cover allows dirt and moisture to accumulate inside the frame, which can accelerate internal corrosion. When reinstalling, ensure the fasteners are torqued to specification and that the cover sits flush against the frame surface.