The tractor-drawn flail mower has a tow bar (14) made up of an upper (24) and lower (26) bar. The inner ends of these are attached by pivots to the machine frame (16) and the outer ends are both pivoted on a yoke (28) so that they are parallel and self-lev...

The control system to set the position of a towbar, and especially the coupling shaft between a tractor and a mowing machine and the like, has a motor (30) operated by a pressure medium, controlled by a breaker valve (54). This interrupts the flow of the p...