Embodiments of an apparatus for reducing plant material are disclosed. In one embodiment, the apparatus includes a frame, a boom coupled to and extending from the frame, a drive assembly at least partially coupled to the boom and having a drive shaft rotatable relative to the boom, a hub interconnected to and rotatable with the drive shaft, a cutting wheel interconnected to and rotatable with the hub, and a shearing device coupled to the boom and having a working surface adjacent the hub. The working surface at least partially defines a shearing feature for shearing material wrapped around the hub as the hub rotates.

A stump grinding system that includes a vehicle and a stump grinder adapted to engage with the vehicle. The vehicle has a first end, a second end opposite to the first end, and a longitudinal axis defined therebetween. The stump grinder includes a chassis operably engaged with the vehicle at one of the first end and the second end. The stump grinder also includes a body operably engaged with the chassis and a grinder wheel operably engaged with the body and partially disposed outside of the body from the vehicle. The stump grinder also includes a drive assembly operably engaged with the grinder wheel and the body. The grinder wheel of the stump grinder is configured to rotate in a plane that is orthogonal to the longitudinal axis of the vehicle.

A stump grinding system that includes a vehicle and a stump grinder adapted to engage with the vehicle. The vehicle has a first end, a second end opposite to the first end, and a longitudinal axis defined therebetween. The stump grinder includes a chassis operably engaged with the vehicle at one of the first end and the second end. The stump grinder also includes a body operably engaged with the chassis and a grinder wheel operably engaged with the body and partially disposed outside of the body from the vehicle. The stump grinder also includes a drive assembly operably engaged with the grinder wheel and the body. The grinder wheel of the stump grinder is configured to rotate in a plane that is orthogonal to the longitudinal axis of the vehicle.

A stump grinder for attachment with a vehicle. The stump grinder includes a chassis operably engaged with the vehicle at one of the first end and the second end. The stump grinder also includes a body operably engaged with the chassis. The stump grinder includes a front end positioned proximate to the body, and a rear end positioned proximate to the chassis and opposite to the front end. The stump grinder also includes a grinder wheel operably engaged with the body. The stump grinder also includes a drive assembly operably engaged with the grinder wheel and the body. The stump grinder also includes a push blade assembly operatively engaged with the body, wherein the push blade assembly is independently rotatable on the body between the front end of the body and the rear end of the body.

A tooth assembly for use in a grinding wheel, the tooth assembly comprising a holder for holding at least one tooth within a slot of the grinding wheel, wherein the at least one tooth comprises a tooth body, wherein the at least one tooth is removably attached to the holder by attachment means comprising a recess within the tooth body and a fixing receivable in the recess.

Vehicles having a control console that may be moved between a plurality of locations relative to the body of the vehicle are disclosed. The control console may include a direction control device for controlling movement of the vehicle that is adaptive such that movement of the vehicle is based on both the direction at which the direction control device is actuated and the sensed position of the control console.

A hydraulically powered implement is designed for use in connection with a tractor that has a hydraulic pump that supplies pressurized hydraulic fluid to the implement. The implement includes a variable displacement hydraulic motor, an operative element driven by the hydraulic motor, a speed sensor configured to measure the rotational speed of the operative element and output a speed signal representative of the measured speed, a shift module that adjusts the displacement of the hydraulic motor in response to a shift command signal, and a controller. The controller sends the shift command signal to the shift module in response to speed signal output by the speed sensor.

A tooth (2) for use in a grinding wheel (4), the tooth (2) comprising means (8) for cooperating with a corresponding structure within a slot (10) of the grinding wheel (4) and means (14) for locking the tooth (2) in the slot (10) of the wheel (4), and a grinding wheel (4) comprising the tooth (2).

A stump grinder has a grinding arm that durably mounts a rotatable grinding wheel by securing the drive shaft of a motor to the grinding wheel such that a pair of bearings within the motor support one side of the grinding wheel and by supporting the other side of the grinding wheel with a stub shaft received within a third bearing. The grinding arm is laterally offset on the frame of the stump grinder to have a swing angle that is not symmetrical relative to the width of the frame, but with the swing angle starting at one side of the frame and then traversing across substantially the entire width of the frame to improve the ability of the operator to see the grinding wheel. A single joystick is movable in orthogonal directions corresponding to desired up and down and side-to-side pivoting motions of the grinding arm. The joystick includes a depressible trigger for starting and stopping the operation of the grinding wheel.

A stump grinder has a grinding arm that durably mounts a rotatable grinding wheel by securing the drive shaft of a motor to the grinding wheel such that a pair of bearings within the motor support one side of the grinding wheel and by supporting the other side of the grinding wheel with a stub shaft received within a third bearing. The grinding arm is laterally offset on the frame of the stump grinder to have a swing angle that is not symmetrical relative to the width of the frame, but with the swing angle starting at one side of the frame and then traversing across substantially the entire width of the frame to improve the ability of the operator to see the grinding wheel. A single joystick is movable in orthogonal directions corresponding to desired up and down and side-to-side pivoting motions of the grinding arm. The joystick includes a depressible trigger for starting and stopping the operation of the grinding wheel.