A stabilizer for a attachment device of a vehicle includes a first adjusting element and a second adjusting element, guided adjustably relative to one another along a longitudinal axis to vary the length of the stabilizer. A first connecting element on the first adjusting element can support the stabilizer against the vehicle. A second connecting element can support the stabilizer against an element of the attachment device, being held on the second adjusting element in an axially adjustable manner for adjusting the length of the second adjusting element and fixable on the second adjusting element at least in an extending position and in a shortening position. In a maximally retracted position of the first adjusting element and the second adjusting element relative to each other, and in the extending position of the second connecting element, the first adjusting element is axially supported against the second connecting element or the second adjusting element. In the maximally retracted position of the first adjusting element and the second adjusting element relative to each other, and in the shortening position of the second connecting element, the first adjusting element is axially supported against the second connecting element.

A sway adjustment apparatus includes a casing, a fastener positioned within an interior of the casing, a first seal positioned near a first end of the casing between the fastener and the casing, a second seal positioned near a second end of the casing between the fastener and the casing, a cover positioned at a first end of the fastener, and end member positioned at a second end of the fastener. A first set of external threads on the fastener cooperate with internal threads in the casing. The first set of external threads and the internal threads are positioned between the first seal and the second seal. Rotating the fastener in a first direction extends the fastener from the casing. Rotating the fastener in a second direction retracts the fastener into the casing. The end member maintains the position of the fastener within the casing.

A sway adjustment apparatus includes a casing, a fastener positioned within an interior of the casing, a first seal positioned near a first end of the casing between the fastener and the casing, a second seal positioned near a second end of the casing between the fastener and the casing, a cover positioned at a first end of the fastener, and end member positioned at a second end of the fastener. A first set of external threads on the fastener cooperate with internal threads in the casing. The first set of external threads and the internal threads are positioned between the first seal and the second seal. Rotating the fastener in a first direction extends the fastener from the casing. Rotating the fastener in a second direction retracts the fastener into the casing. The end member maintains the position of the fastener within the casing.

A stabilizer for an attachment device of a vehicle comprises a first adjusting element and a second adjusting element which are guided adjustably relative to one another along a longitudinal axis in order to vary the length of the stabilizer, a first connecting element on the first adjusting element for supporting the stabilizer against the vehicle, and a second connecting element on the second adjusting element for supporting the stabilizer against an element of the attachment device, the second connecting element being connected to the second adjusting element such that it can be rotated about the longitudinal axis via a screw connection for adjusting the length of the second adjusting element. The stabilizer further has a locking device, which is connected to the second adjusting element and the second connecting element, the second adjusting element and the second connecting element being connected to one another in a rotationally fixed manner in a locking position of the locking device.

A towed agricultural working tool with a central frame element, a headstock and left and right hand side frame elements connected to the central frame element, each of the side elements supporting at least one processing unit, the central frame element being connected at, at least one connecting location for pivoting movement with respect to the headstock in which one or more friction elements are arranged between the central frame element and the headstock at one of the at least one connecting locations. This has as an advantage that the pivoting movement of the central frame with respect to the headstock, in particular due to induced yaw, is reduced.

A towed agricultural working tool with a central frame element, a headstock and left and right hand side frame elements connected to the central frame element, each of the side elements supporting at least one processing unit, the central frame element being connected at, at least one connecting location for pivoting movement with respect to the headstock in which one or more friction elements are arranged between the central frame element and the headstock at one of the at least one connecting locations. This has as an advantage that the pivoting movement of the central frame with respect to the headstock, in particular due to induced yaw, is reduced.

The turning radius of a differentially steered vehicle towing a trailer is controlled when turning so that its turning radius is greater than a minimum allowable turning radius. The turning radius may be autonomously adjusted using a controller to monitor the instantaneous rotational speed differential between the driven wheels and increase or decrease the relative speed between the wheels when the instantaneous rotational speed differential exceeds a threshold rotational speed differential, indicating a turn which is too tight. Alternately, the turning radius may be controlled by the vehicle's operator, who receives a signal from the controller indicating that the vehicle's turning radius is less than the minimum allowable. The operator may then take action to enlarge the turning radius using manual controls.

A control system for an implement hitch of an agricultural vehicle, wherein the hitch is mounted to the vehicle and includes one or more hydraulic cylinders or other actuators operable to raise and lower the hitch between minimum and maximum heights relative to the vehicle and hold the hitch static at one or more heights between the minimum and maximum heights. The control system includes a rocker control device having a first operating position and being movable in a first direction to a first limit position and in a second direction to a second limit position. An electronic control unit (ECU) is connected to the rocker control device and controls operation of the or each of the hydraulic cylinders or actuators and thereby control raising and lowering of the hitch in response to user operation of the rocker control device. The ECU is operable to control raising and lowering of the hitch to move it to a selected one of two or more previously stored positions between the said minimum and maximum heights, and to switch between the said previously stored positions in response to a predetermined first actuation operation of the same rocker control device. Preferably, the same rocker control device is used to control the input and storage of at least one further height value.

A control system for an implement hitch of an agricultural vehicle, wherein the hitch is mounted to the vehicle and includes one or more hydraulic cylinders or other actuators operable to raise and lower the hitch between minimum and maximum heights relative to the vehicle and hold the hitch static at one or more heights between the minimum and maximum heights. The control system includes a rocker control device having a first operating position and being movable in a first direction to a first limit position and in a second direction to a second limit position. An electronic control unit connected to the rocker control device is configured to control operation of the or each of the hydraulic cylinders or actuators and thereby control raising and lowering of the hitch in response to user operation of the rocker control device. The ECU is operable to control raising and lowering of the hitch according to one of two or more control modes, and to switch between said control modes in response to a predetermined first actuation operation of the same rocker control device.

The turning radius of a differentially steered vehicle towing a trailer is controlled when turning so that its turning radius is greater than a minimum allowable turning radius. The turning radius may be autonomously adjusted using a controller to monitor the instantaneous rotational speed differential between the driven wheels and increase or decrease the relative speed between the wheels when the instantaneous rotational speed differential exceeds a threshold rotational speed differential, indicating a turn which is too tight. Alternately, the turning radius may be controlled by the vehicle's operator, who receives a signal from the controller indicating that the vehicle's turning radius is less than the minimum allowable. The operator may then take action to enlarge the turning radius using manual controls.