One or more techniques and/or systems for application of a supplemental downward force to a ground working implement. A mechanical advantage from a lever arm can be utilized to apply supplemental downforce to a ground working implement. A biasing force can be applied to the lever arm by a spring assembly at various locations. Moving the spring assembly along the lever arm can vary the amount of downward force applied by the lever arm to ground working implement. In some implementations, moving the spring assembly to a different end of the lever arm applies an upward force to a coupled ground working implement.

The electric tractor is equipped with a battery, a transmission unit, a machine body frame, a rear axle unit, and a front axle unit. The transmission unit shifts the input power and outputs the shifted input power. The machine body frame is fixed to the transmission unit. The rear axle unit supports the rear wheels, and transmits, to the rear wheels, the power output from the transmission unit. The front axle unit supports the front wheels. The rear axle unit and the front axle unit support chassis including the machine body frame and transmission unit. The battery is supported by the chassis.

An agricultural vehicle having a chassis, wheels, a power unit, and a header. The header has a center section, at least one wing section extending laterally from the center section, and a wing section support. The center section is movable relative to the chassis, the wing section is movable relative to the center section, and the wing support is movable relative to the wing section. The combine has a control system that is configured to determine that the combine is configured to drive at a road-driving speed, and in response to such determination: operate a center section actuator to move the center section to a raised center section position, operate a wing section actuator to move the wing section to a raised wing section position, and operate a wing support actuator to move the wing support to a raised wing support position.

An agricultural vehicle having a chassis, wheels, a power unit, and a header. The header has a center section, at least one wing section extending laterally from the center section, and a wing section support. The center section is movable relative to the chassis, the wing section is movable relative to the center section, and the wing support is movable relative to the wing section. The combine has a control system that is configured to determine that the combine is configured to drive at a road-driving speed, and in response to such determination: operate a center section actuator to move the center section to a raised center section position, operate a wing section actuator to move the wing section to a raised wing section position, and operate a wing support actuator to move the wing support to a raised wing support position.

An implement operating apparatus has a U-shaped drive frame supported on drive wheels, each pivotally mounted about a vertical wheel pivot axis. A steering control selectively pivots each drive wheel. A power source is connected through a drive control to rotate the drive wheels in either direction. First and second implements are configured to perform implement operations and to rest on the ground and when the drive frame is maneuvered to an implement loading position with respect to each implement, the implement is connectable to the drive frame and movable to an operating position supported by the drive frame. When the implement is in the operating position, the steering and drive controls are operative to move and steer the drive frame and implement along a first travel path or a second travel path oriented generally perpendicular to the first travel path.

In a hydraulic adjustment device, preferably for transverse adjustment of the lower links of a three-point power lift on an agricultural machine, with two selectively controllable hydraulic cylinders and a hydraulic control circuit for actuating them, a control circuit with a pressure control device for generating an adjustable control pressure in dependence on an electrical control signal is provided, and a pressure-controlled changeover valve is connected to the pressure control device and, when a first control pressure value is applied, assumes a first switching position in which a first cylinder is connected to a pressure sink and the second cylinder is connected to a pressure source, and, when a second control pressure value is applied which is higher than the first control pressure value, assumes a second switching position in which the first cylinder is connected to the pressure source and the second cylinder is connected to the pressure sink.

An operation device of a work vehicle includes a position lever to set a height of a work device, a sensitivity adjustment lever to adjust an up/down sensitivity of the work device, and an up/down lever to selectively change a working state and a non-working state, the working state being a state in which the work device is positioned at the height set by the position lever, the non-working state being a state in which the work device is positioned above the set height. The up/down lever is located rearward of the position lever and the sensitivity adjustment lever.

A cutting unit (1) that has a cutter bar (6) that is operated rigidly or flexibly, depending on the harvest conditions, which can be operated in at least two different operating modes, wherein the cutting unit (1) includes a first sensor assembly (1) disposed on the cutting unit (1) that can be deactivated, which is for operating the cutting unit (1) in a first operating mode, and a second sensor assembly (17) for operating the cutting unit (1) in a second operating mode, wherein, when switching between the at least two operating states, the first sensor assembly (13) or the second sensor assembly (17) is activated without interruption in operation, to execute a distance determination, depending on the selected operating mode.

An agricultural implement for cultivating an agricultural work area includes a main frame which is transferable between an operating position and a transfer position. A first subframe is connected to the main frame, and the first subframe is transferable between an operating position and a transfer position. A main frame hydraulic cylinder and a first subframe hydraulic cylinder move the main frame and the first subframe between their corresponding positions. In order to provide correct and repeatable positioning of the first subframe hydraulic cylinder, a volume of a first chamber of the main frame hydraulic cylinder is substantially equal to a volume of the first chamber of the first subframe hydraulic cylinder when the first subframe is in its operating position.

An agricultural implement for cultivating an agricultural work area includes a main frame which is transferable between an operating position and a transfer position. A first subframe is connected to the main frame, and the first subframe is transferable between an operating position and a transfer position. A main frame hydraulic cylinder and a first subframe hydraulic cylinder move the main frame and the first subframe between their corresponding positions. In order to provide correct and repeatable positioning of the first subframe hydraulic cylinder, a volume of a first chamber of the main frame hydraulic cylinder is substantially equal to a volume of the first chamber of the first subframe hydraulic cylinder when the first subframe is in its operating position.