A system for controlling harvesting implement height of an agricultural harvester may include a computing system configured to monitor the height of a harvesting implement of the harvester relative to a field surface based on the received sensor data. Additionally, the computing system may be configured to determine an implement height error signal by comparing the monitored height of the harvesting implement to a predetermined target height. Moreover, the computing system is configured to divide the determined implement height error signal into a first and second frequency portions, with the second frequency portion having a greater frequency than the first frequency portion. Furthermore, the computing system is configured to control the operation of first and second actuators of the harvester based on the first and second frequency portions of the implement height error signal, respectively.

System and method for a lock valve for a hydraulic actuator. The lock valve includes a valve housing coupled to the hydraulic actuator. The valve housing defines a chamber in selective fluid communication with a hydraulic circuit. The lock valve includes a valve body received within the chamber and responsive to the hydraulic circuit to move to an unlock position in which the lock valve is unlocked. The valve body includes a rod having a first end and an opposite second end. The valve body includes a head coupled to the rod between the first end and the second end. The head is responsive to the hydraulic circuit to move the valve body to the unlock position, and in the unlock position, the first end of the rod extends outwardly from the valve housing to visually indicate the lock valve is unlocked.

A crop harvesting machine with a cutter bar on a header frame has a height control system which uses depending sensor fingers arranged in contact with the ground so as to measure a height of the cutter bar above the ground. The sensor fingers are controllably retractable under actuation from an operator in the cab or automatically in response to prescribed conditions being met. The actuator used in retracting the sensor fingers can also be used to adjustably control ground pressure of the sensor fingers in the deployed position of the sensor fingers engaging the ground. The header height is adjusted using laterally spaced apart hydraulic linkages which can be operated at different elevations relative to one another responsive to different height signals relating height of opposing ends of the header frame relative to the ground to also control tilt of the header relative to the harvester frame.

Disclosed is a lifting assembly for a crop severing assembly forwardly carried by a tractor having a frame and front a frame and an axle assembly carrying front wheel assemblies. The crop severing assembly has a forward end and a rear end, and includes a pair of bracket assemblies located at the forward end and atop the crop severing assembly. A pair of lift cylinder assemblies each have a lower end and a top end. The lift cylinder lower ends are located at either side of the rear end of the crop severing assembly to bottom brackets extending from the tractor frame forward of the tractor axle assembly and are attached between each cylinder lower end and each cylinder top end to trunnions carried by the crop severing bracket assemblies for pivotally raising and lowering of the forward end of the crop severing assembly.

A harvesting header for a combine harvester comprises a central header section and two lateral header sections hinged to and arranged to rotate relative to the central section for assuming a working configuration, in which the three header sections are mutually horizontally aligned, and a transport configuration, in which the lateral header sections overlap the central section. The header sections are provided with a support frame and a cutting bar associated with the support frame by a hydraulic suspension and comprising a blade having substantially trapezoid-shaped knives capable of to-and-fro movement by a motor-driven control member. The header sections also include a pick-up reel supported on the support frame by means of swivel arms, a transport belt conveyor arranged downstream of the cutting bar and configured to feed the material cut by the cutting bar downstream of the harvesting header toward a rear part of the harvesting header.

A forage harvester that includes a cutterhead assembly and two frame parts between which the cutterhead assembly is rotatably suspended. The forage harvester assembly is held on both frame parts by a clamp bearing that defines a rotary axis. Contact points between an element on the frame part side and an element on the assembly side of the clamp bearing lie on a spherical surface centered on the rotary axis.

A method, apparatus and system for controlling positioning of an agricultural implement is disclosed. The agricultural implement is mounted on a propulsion unit having a positioning system. A position signal is received from a position sensor representing a position of the agricultural implement relative to the ground, and while a difference between the position and a desired position is greater than a threshold difference, a controller produces and transmits an output signal having a control state that alternates successively between an active time during which the output signal causes the positioning system to move the agricultural implement towards the desired position, and an inactive time during which the output signal causes the positioning system to discontinue movement. The respective times are based on a positioning response time and are operable to permit the agricultural implement to settle in a non-transient position during the inactive time while receiving the position signal.

A crop header having a frame mounted on a vehicle has a sickle cutter bar and a draper. The draper is guided at its front edge by a longitudinally extending rail mounted on the frame. The cutter bar is mounted at spaced positions by spring blades attached to a fixed beam at the rear which allow up and down flexing movement of the cutter bar relative to the draper rail. At the center discharge the cutter bar is carried on shorter blades which are carried on a beam in front of the front draper roller. A locking device is provided for commonly and automatically moving the beam in a direction to lift the cutter bar into a raised position in which the cutter bar is locked against flexing movement with the locking device being operable in response to the cutter bar being raised off the ground.

Disclosed is a lifting assembly for a crop severing assembly forwardly carried by a tractor having a frame and front a frame and an axle assembly carrying front wheel assemblies. The crop severing assembly has a forward end and a rear end, and includes a pair of bracket assemblies located at the forward end and atop the crop severing assembly. A pair of lift cylinder assemblies each have a lower end and a top end. The lift cylinder lower ends are located at either side of the rear end of the crop severing assembly to bottom brackets extending from the tractor frame forward of the tractor axle assembly and are attached between each cylinder lower end and each cylinder top end to trunnions carried by the crop severing bracket assemblies for pivotally raising and lowering of the forward end of the crop severing assembly.

In one embodiment, a machine, comprising: a chassis supporting a hydraulic float assembly, the hydraulic float assembly comprising first plural cylinders and a first control component; a header coupled to the hydraulic float assembly, the header comprising: a frame comprising processing components on an upper side of the frame and plural skid plates on a lower side of the frame, the plural skid plates adjustably coupled to the frame via respective second plural cylinders; and a controller configured to: receive a first input; and provide a first signal to a second control component coupled to the second plural cylinders based on the first input, the second control component configured to adjust fluid flow through the second plural cylinders based on the first signal, the second plural cylinders causing adjustment of a position of the plural skid plates based on the adjusted fluid flow.