A work vehicle multi-coupler assembly having a controlled breakaway feature include a pair of coupling elements that mate along a coupling axis. A shear pin is carried by one of the coupling elements. A coupler mechanism connected to the second coupling element and configured to engage the shear pin to bring the first coupling element into mating engagement with the second coupling element. The coupler mechanism is configured to shear the shear pin to permit movement of the first coupling element away from the second coupling element along the coupling axis during a breakaway event.

Self-propelled vehicles for supporting and operating a device are disclosed. Example devices include agricultural devices. The vehicle includes mounting arms that allow the device to be extended forward or rearward of the vehicle. In some embodiments, the device is releasably coupleable to the vehicle. In some embodiments, the vehicle includes rear drive wheels and front caster wheels.

A method for determining a mass of an implement attached to a vehicle includes providing a powerlift having at least one upper link and one lower link, a support structure, and the implement. The method also includes defining an angle () between the upper link and a vehicle horizontal line, an angle () between the lower link and a vehicle horizontal line, an angle of inclination () of a vehicle horizontal line relative to a terrestrial horizontal line, a path (AK) that represents a connection along the lower link between the support structure and the implement, and a force (F.sub.E) impinging on a connection between the upper link and the implement and acting along the upper link. The mass is determined as a function of at least one of the angle (), the angle (), the angle of inclination (), the path (AK), and the force (F.sub.E).

A method is provided for determining a weight of a payload carried by a support structure of an agricultural utility vehicle via a hitch. The hitch includes at least one upper link and at least one lower link. The method includes determining the weight based on at least one of (1) an angle between the upper link and a vehicle horizontal, and (2) a holding force that arises at a connection between the upper link and the payload and is effective along the upper link.

A force sensor is suitable for an electrohydraulic hitch control system of an agricultural tractor. The force sensor has an outer cylindrical part with a bore and a measuring rod fixed on one side in the bore. A central section of the cylindrical part is provided as force introduction section. Two outer sections of the cylinder part are removed equally far axially from the center of the force introduction section and are provided as abutment sections. The measuring rod is clamped in an area of the force introduction section.

A working implement diagnostic system includes a weight sensor to detect the weight of a working implement connected to a traveling machine body of an agricultural machine that travels in an agricultural field, and a controller configured or programmed to diagnose the working implement based on a change in the weight of the working implement. An agricultural machine includes a working implement diagnostic system, a traveling machine body, and a connector to connect a working implement to the traveling machine body. An agricultural work support system includes the working implement diagnostic system, an agricultural machine, and a management server including a database accessible from outside. The agricultural machine further includes a communicator to wirelessly communicate with the management server. The controller transmits a result of diagnosing the working implement to the management server via the communicator. The management server receives the diagnosis result and stores the diagnosis result in the database.

A method for identifying a ground-penetrating accessory on an agricultural tractor which has a rear three-point power lift having left and right lower links supported at lower securing locations of the three-point power lift to be pivoted vertically and raised and lowered by a lifting mechanism, includes measuring via a sensor arrangement a tensile force occurring on one or more of the left and right lower links, and drawing via a control unit a conclusion relating to a ground-penetrating accessory which is attached to the lower links when it identifies that the tensile force path when the lower links are raised approaches a static negative value.