Patent ID: 8602137

Claim:
A self-propelled farm implement comprising: a main frame of the self-propelled farm implement comprising a suspension spring mount; a suspension spring mounted to the suspension spring mount; an axle mounted to the suspension spring, the axle supporting the main frame via the suspension spring, the main axle and the main frame isolated from each other by the suspension spring; a wheel mount that operably couples a motor to a wheel and hub assembly; and a linkage lift mechanism, the linkage lift mechanism comprising: a yoke connected to the axle yet operably independent of the suspension spring; and a lift linkage pivotably connected to the yoke and rotatably coupled to the wheel mount, the lift linkage comprising an actuator, an upper linkage, and a lower linkage, the actuator configured to concurrently move the upper and lower linkages to a first extreme position corresponding to a high ground clearance configuration of the self-propelled farm implement and a second extreme position corresponding to a low ground clearance configuration of the self-propelled farm implement.