Abstract: A drive mechanism for use with an engine in combination with a rear engine power takeoff operatively connected to the engine before a transmission. The drive mechanism has a first shaft rotatably connected between the rear engine power takeoff and an activator for the drive mechanism and an adjustment gearbox operatively connected to the activator. The adjustment gearbox is rotatably connected to a second shaft extending to a driven gearbox. The second shaft is adapted for rotation up to a predetermined speed. The activator is adapted to activate the adjustment gearbox, thereby operatively connecting the first shaft to the adjustment gearbox, and to de-activate the adjustment gearbox. Also, the adjustment gearbox is adapted for adjustment of the speed of rotation of the first shaft so that the speed of rotation of the second shaft is within the predetermined speed.

Abstract: A vertical mixer has a mixing chamber with a vertical auger rotatably mounted therein. The mixing chamber has a side wall and a floor. The side wall has an opening therein that is closable by a door. The door is constructed to be opened and closed by an hydraulic cylinder connected in parallel to a linkage.