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.

A tarp roller for rolling a tarp or other ground cover has a frame adapted for mounting to a tow vehicle. The frame has a first support arm and a second support arm extending therefrom in spaced part relation. A primary rotatable spindle is powered and removably connected between the first support arm and the second support arm. A retainer to retain the tarp against the primary rotatable spindle comprises an elongate member mounted in removable spaced apart, coaligned relation with the primary rotatable spindle to move with the primary rotatable spindle as it rotates. The tarp roller further comprises further a secondary guide roller rotatably attached to the frame at a position above and forward of the primary rotatable spindle. A method of rolling a tarp is provided.

A lift arm control system can be configured to raise or lower a lift arm assembly of an agricultural machine with variable speed so that the lift arm assembly can optimally perform under varying conditions, including changing a tool connected to the lift arm assembly while stationary and/or moving the lift arm assembly while operating at various speeds in the field. The lift arm assembly can be manually configured to adjust with speeds that are proportional to a user input. The lift arm assembly can also be automatically configured to adjust with speeds that are proportional to sensor(s) input of the machine, such as a vehicle speed sensor.

A connector, e.g. a quick connector, for hydraulic applications, in particular for hydraulic circuits and the like, the connector including a female coupling and a male coupling suited to be alternatively connected and disconnected from each other, wherein the mutual connection of the female and male coupling translates into the possible flow of a fluid between the female and male couplings, wherein at least either the male or female coupling comprises a first detection sensor configured so as to detect working and/or operating parameters and/or values of the connector.

A system, apparatus and method for providing task-specific ride-height control in a self-propelled agricultural product applicator utilize a controllable ride-height trailing arm suspension system for independently joining each wheel to a frame of the applicator. Each trailing arm suspension system includes upper and lower suspension arms, an extensible air strut, and an angular position sensor operatively interconnected to one another and disposed between a rolling axis of the ground engaging wheel independently supported by that suspension system and a point of attachment of the suspension system to the frame, such that the position sensor detects a relative angular position between the upper and lower suspension arms at a present extension of the air strut. An electronic control unit utilizes the angular positions detected by the sensors, in conjunction with a desired task input, to control the air struts in a manner providing a ride-height corresponding to the desired task input.

A system, apparatus and method for detecting and controlling the height of a frame of a self-propelled agricultural product applicator above a ground surface utilize a trailing link suspension system including an angular position sensor and extensible air strut, for connecting ground engaging wheels of the applicator to the frame of the applicator. Height of the applicator above the ground surface is determined by measuring relative angular rotation of upper and lower suspension arms of the suspension system about a suspension pivot axis, using the angular position sensor. Height is controlled by regulating a flow of pressurized air to the air strut, to thereby control extension of the air strut in a manner that controls a frame to axle, ride-height, distance of the suspension system.

Disclosed are an implement descending stability control method and system and a tractor. An outlet of a main pump is communicated with an inlet of a main overflow valve, an inlet of a constant-difference overflow valve and an inlet of an implement control valve. An oil outlet of the implement control valve is connected with a spring cavity of the constant-difference overflow valve through a steady-state throttle valve and is communicated with an inlet of a switching valve. An oil outlet of the switching valve is connected with a rodless cavity of a suspension cylinder in a suspension mechanism, and the rodless cavity of the suspension cylinder is communicated with an inlet of a descending valve. A rod cavity of the suspension cylinder is connected with an inlet of a secondary overflow valve.

A working machine includes a prime mover to produce power, a variable displacement hydraulic pump to be actuated by power produced by the prime mover to deliver hydraulic fluid, a hydraulic actuator to be actuated by hydraulic fluid delivered by the hydraulic pump, a control valve to adjust hydraulic fluid to actuate the hydraulic actuator, and a controller configured or programmed to control the control valve. The controller is configured or programmed to, based on an actual rotation speed of the prime mover, control the control valve to limit a maximum flow rate of hydraulic fluid supplied from the control valve to the hydraulic actuator such that the maximum flow rate does not exceed a limit flow rate. The limit flow rate corresponding to a rotation speed of the prime mover is not more than a maximum delivery flow rate of the hydraulic pump corresponding to the rotation speed.

A control system for an agricultural implement includes an electric pump fluidly coupled to a fluid cylinder and configured to control a fluid pressure within the fluid cylinder. The fluid cylinder is configured to apply a force to a ground-engaging tool of the agricultural implement. The electric pump is disposed on the agricultural implement.

A working machine includes a driver including a hydraulic actuator and a driven structure to be raised/lowered by the hydraulic actuator, a control valve to control the hydraulic actuator, and a controller configured or programmed to control the control valve to move the driven structure to a target position. The controller is configured or programmed to switch between (i) a first mode in which the controller controls the control valve by performing a first control based on a target flow rate of hydraulic fluid to actuate the hydraulic actuator and a deviation of an actual position of the driven structure from a target value and (ii) a second mode in which the controller controls the control valve by performing a second control including controlling the target flow rate to be lower than the first control when the deviation is more than zero and less than a predetermined deviation.