A grading machine includes a machine body, a grading blade supported by a circle, a drawbar connecting the grading blade and the circle to the machine body, and a circle drive system. The circle drive system includes a circle drive motor with a motor shaft, a gear box, a gear coupling, and a braking mechanism. The gear box is configured to engage with and rotate the circle relative to the drawbar around a circle axis. The braking mechanism is positioned between the circle drive motor and the gear coupling and is configured to selectively engage the motor shaft.

A structurally integrated fuel tank and method of assembling is disclosed. The fuel tank may comprise a body and a neck disposed on the body. The neck may be configured to be coupled to an arm of a front frame of a machine. The body may comprise a cover, an endwall and a base. The cover includes a cover hitch that defines an upper pivot bore centered about a pivot axis. The upper pivot bore is configured to receive a pivot fastener about which the fuel tank is pivotable. The endwall may be disposed below and coupled to the cover. The base may be coupled to the endwall, and may include a lower hitch that extends outward and away from the endwall. The neck and the body together define a chamber configured to store fuel. The cover is a top of such chamber.

A first switch valve is connected to a cap-side circuit of a lift cylinder. A second switch valve is connected to a head-side circuit of the lift cylinder. A first accumulator is connected to the cap-side circuit of the lift cylinder with the first switch valve being interposed. A second accumulator is connected to the head-side circuit of the lift cylinder with the second switch valve being interposed. A third switch valve is connected between the first accumulator and the second accumulator.

A work attachment for a motor grader includes a moldboard and a trip edge assembly coupled to the moldboard. The moldboard defines a plurality of first apertures. The trip edge assembly includes a trip edge structure. The trip edge assembly also includes a pivoting mechanism for pivoting a portion of the trip edge assembly in a first direction with respect to the moldboard when the trip edge assembly encounters an object in a drive path of the motor grader. The trip edge assembly further includes a mounting structure defining a plurality of second apertures. The plurality of second apertures are aligned with the plurality of first apertures to receive mechanical fasteners for removably coupling the trip edge assembly with the moldboard.

A control system controls movement of a work implement of a work vehicle and includes a pump, a first actuator in fluid communication with the pump, a first control valve fluidly positioned between the pump and the first actuator, a first proportional relief valve fluidly positioned between the pump and the first actuator, a second actuator in fluid communication with the pump, a second control valve fluidly positioned between the pump and the second actuator, and a second proportional relief valve fluidly positioned between the pump and the second actuator. The first proportional relief valve permits flow of fluid from the first actuator upon an impact at a first set force. The first set force is adjusted by a user. The second proportional relief valve permits egress of fluid from the second actuator upon an impact at a second set force. The second set force is adjusted by a user.

A vehicle walking beam assembly includes a support beam and a mount member configured to rotatably mount the support beam on the chassis. A gear assembly with a gear train and a gear housing is supported by the support beam. The gear train includes a gear with a first journal surface, and the housing includes a second journal surface. The walking beam assembly additionally includes an input drive assembly that delivers input torque from the engine to the gear train. Moreover, the walking beam assembly includes a reaction member connected to one of the gear housing and the gear of the gear train. The reaction member is configured to transfer a reaction force between the chassis and the one of the gear housing and the gear of the gear train as the first journal surface journals on the second journal surface.

A motor grader having an articulated frame that includes a first front frame portion and a second rear frame portion that is angularly moving with respect to the first frame portion around a pivoting axis. A front steering system includes front wheels that are movable around a steering axis with respect to the articulated frame and around leaning axis transversal to the steering axis so that the front wheels may turn and lean during steering operation. A control unit receives as an input a control signal representing a steering angle and outputs steering actuation commands for an hydraulic actuating system of the front steering system and for a hydraulic actuating system of the articulated frame realizing synchronized and proportional angular movements of the front wheels around the steering and leaning axes and of the first and second portions of the frame around the pivoting axis.

A work vehicle includes a first frame, a second frame pivotally coupled to the first frame at an articulation joint, and a control circuit operable to control relative movement of the first and second frames about the articulation joint. The control circuit includes a pump, an actuator in fluid communication with the pump, and a first valve assembly coupled to a user-manipulable control. The first valve assembly is configured to direct fluid from the pump to the actuator in response to movement of the user-manipulable control to pivot the first and second frames. The control circuit also includes a second valve assembly configured to direct fluid from the pump to the actuator in response to receiving an electronic control signal to pivot the first and second frames.

An articulation joint for a machine includes a first frame portion, a second frame portion, a hinge pin, a bearing member, a bushing member, and a washer assembly. The washer assembly includes a thrush washer and a housing. The thrust washer includes a plurality of washer segments. Each of the plurality of washer segments is adapted to be disposed co-planar and adjacent with respect to one another. The plurality of washer segments defines a central space adapted to receive the hinge pin therethrough. The housing includes a plurality of housing segments. Each of the plurality of housing segments is adapted to be disposed co-planar and adjacent with respect to one another. The plurality of housing segments defines an internal space adapted to enclose each of the washer segments therein.

A service tool and method of using for calibrating a position of a cutting edge of a blade. The service tool may comprise an inward-side face disposed between a first face and a second face. The inward-side face may include a curved portion, a leg portion and a notch configured to receive the cutting edge. The first face includes a curved edge, a plurality of horizontal lines and a plurality of vertical lines. When the cutting edge is received in the notch, and the curved portion abuts the top face of a bolt, the plurality of horizontal lines is configured to measure a vertical distance from a center of the top face to the cutting edge, and the plurality of vertical lines is configured to measure a horizontal distance from the center of the top face to the cutting edge.