Subtopic: Hitch systems and hitching of tillage implements
Question Statement:
In a standard three-point hitch mechanism of a tractor, the virtual hitch point in the vertical plane for a free-link operation is located at:
Options:
(A) The intersection of the centerlines of the upper link and the lower links in the vertical longitudinal plane
(B) The rear axle centerline of the tractor
(C) The center of gravity of the attached tillage implement
(D) The drawbar pin location
Answer Key:
A
Step-by-Step Solution & Explanation
In free-link operation of a three-point linkage, the implement is free to pitch and float. The virtual hitch point (instantaneous center of rotation in the pitch plane) is defined by the intersection of the extended centerline of the top link and the lower links projected onto the vertical longitudinal plane.