In accordance with one aspect of the present disclosure a circle drawbar for a motor grader has a drawbar frame having two elongated members, and a circle frame that has a surface defined by an inner and outer diameter. The circle frame has a circle gear located radially inward of the inner diameter, allowing the circle frame to rotatable relative to the drawbar frame around an axis of the circle gear. A platform having a top, bottom, and an edge depends from the drawbar frame and covers the circle gear. A debris remover is connected to the platform and removes debris from surface of the circle frame as the circle frame rotates.

A closed loop feedback circle drive system utilized onboard a motor grader includes an operator input device, a blade, and a multi-speed hydraulic motor having a motor output shaft. The motor output shaft is mechanically linked to blade such that motor output shaft rotation drives rotation of the blade about a blade rotation axis. A controller is operably coupled to the operator input device and to the multi-speed hydraulic motor. The controller is configured to: (i) receive blade rotation commands via the operator input device to rotate the blade about the rotation axis in a commanded manner; and (ii) control the multi-speed hydraulic motor to implement the blade rotation commands, while repeatedly adjusting the rotational speed of the motor output shaft to reduce variations in a rotational velocity of the blade due to changes in blade loading conditions occurring during motor grader operation.

A circle drive for rotating a blade on a draft frame of a motor grader includes a circle gear mounting the blade, a worm wheel, a torque dividing arrangement, and a single input provided on a first shaft. The torque dividing arrangement includes a set of shafts positioned about the worm wheel, a torque dividing gear set, and a set of worm gears meshed with the worm wheel. The worm wheel is operatively coupled to drive the circle gear. The set of worm gears includes a first worm gear on a first shaft and a second worm gear on a second shaft. The single input is configured to provide a driving torque that drives the set of worm gears such that the set of worm gears divides the driving torque. The driving torque is capable of driving the worm wheel for driving the circle gear and rotating the blade.

A wear element for a mounting system for a blade of a motor grader is provided. The wear element extends along a longitudinal axis. The wear element includes a first portion having a first cross-sectional area transverse to the longitudinal axis. The wear element further includes a second portion opposite of the first portion, the second portion having a second cross-sectional area having a V-shape that extends away from the first portion.

A system for a grading machine includes a lift cylinder sensor to measure a position or movement of a lift cylinder, which is coupled to a drawbar. The drawbar is coupled to a circle. The circle is coupled a blade carrier assembly, and the blade carrier assembly is coupled to a blade. The system also includes a drawbar sensor to measure a position or movement of the drawbar, a circle sensor to measure a position or movement of the circle, a blade carrier assembly sensor to measure a position or movement of the blade carrier assembly, and a blade sensor to measure a position or movement of the blade. A controller receives information from the lift cylinder sensor and one or more of the aforementioned sensors and determines whether one or more wear components is in need of inspection, repair, or replacement.

A sealing assembly for a circle member of a motor grader is provided. The sealing assembly includes a plurality of cover segments disposed adjacent to an inner circumference of the circle member. At least one of the plurality of cover segments defines a gap in association with a component disposed adjacent to the at least one of the plurality of cover segments. The sealing assembly also includes a sealing element removably disposed on the at least one of the plurality of cover segments and extending into the gap. The sealing element is adapted to sealingly engage each of the at least one of the plurality of cover segments and the component.

Disclosed is a seal assembly for a grading machine. The grading machine may include a machine body, a blade assembly, and a circle assembly supporting the blade assembly. The circle assembly may include a circle having a plurality of gear teeth. The grading machine may also include a drawbar assembly connecting the circle assembly to the machine body. The seal assembly may include a non-metallic seal component extending circumferentially around an inner circumference of the circle assembly for sealing the plurality of gear teeth.

A method and control system operable to control movement of a work implement of a work vehicle. The control system includes a reservoir that retains fluid, a pump in fluid communication with the reservoir, and an actuator in fluid communication with the pump. The actuator has a first side and a second side. A control valve is fluidly positioned between the pump and the actuator, a first proportional relief valve is fluidly positioned between the pump and the first side of the actuator, and a second proportional relief valve is fluidly positioned between the pump and the second side of the actuator. The first proportional relief valve is configured to permit flow of fluid from the first side of the actuator to the reservoir when a pressure at the first side of the actuator exceeds a pressure set point.

A grading machine includes a machine body, a blade assembly, a circle supporting the blade assembly and including a plurality of teeth, a drawbar assembly connecting the circle to the machine body, and a cover plate coupled to a bottom portion of the drawbar assembly. The drawbar assembly includes a plurality of blocks, and the cover plate is configured to be coupled to the drawbar assembly via the plurality of blocks.

A work vehicle includes an earthmoving implement configured to move material as the work vehicle travels across a surface within a work site. Additionally, the work vehicle includes a computing system configured to access a cut-fill map associated with the work site, with the cut-fill map depicting the material flow for transforming a current grade of the surface into a target grade of the surface. Moreover, the computing system is configured to determine at least one of the target grade of or a direction of the material flow for the surface based on the accessed cut-fill map. In addition, the computing system is configured to control the operation of an actuator to adjust the position of the earthmoving implement relative to a work vehicle frame based on the determined at least one of the target grade or the direction of the material flow.