Caster wheel control apparatus

Abstract From the Canadian patent

In general the remote control of a caster wheel, assembly on a farm implement such as a crop sprayer of the type including a boom rotatable between a transport position and a field position is a complicated operation. In the transport position, the wheel assembly should be fixed i.e. non-castering and in the field position the wheel assembly should caster freely. A relatively simple apparatus for effecting caster wheel assembly control includes a frame mounted on the boom, a hydraulic cylinder on the frame and a, linkage connected to the piston rod of the cylinder and releasably connected to an arm on the shaft carrying the wheel assembly, whereby initial extension of the piston rod moves …