A hydraulic control for an attachment on a work vehicle. The attachment is mounted on the chassis of the work vehicle and movable between a first position and a second position. A hydraulic cylinder is operable to power movement of the attachment. A fluid circuit communicates with the hydraulic cylinder and is configured to carry hydraulic fluid. A fluid reservoir is in communication with the fluid circuit. Accumulators that are in communication with the fluid circuit automatically store and release hydraulic fluid in response to movement of the attachment. A valve assembly controls fluid communication between the fluid reservoir and the fluid circuit in response to movement of the attachment to its second position.

A device for compacting a substrate, comprising an under carriage with a base arranged on the under carriage; a superstructure which is connected to the under carriage so as to transmit a force; a vibration exciter, by means of which at least the base of the undercarriage can be caused to vibrate and a contact plate, which is arranged on the base, said contact plate being arranged on a base lower face facing away from the superstructure such that the contact plate directly contacts the substrate to be compacted during the operation of the device. The contact plate and the base are connected together in a non-destructively releasable manner so as to transmit a force.

A hydraulic fluid system is provided for a work implement having a support plate, the work implement being provided on a machine having an auxiliary hydraulic fluid supply line and an auxiliary hydraulic fluid return line. The hydraulic fluid system includes a motor having an inlet port and an outlet port, and a mounting plate coupled to the support plate of the implement. The mounting plate further defines a supply conduit configured to fluidly communicate between the auxiliary hydraulic fluid supply line and the inlet port of the motor, and a return conduit fluidly communicating between the outlet port of the motor and the auxiliary hydraulic fluid return line. A kit and a method for retrofitting a hydraulic fluid system are also disclosed.

A grading blade for use with a plate compactor and a plate compactor having a grading blade, for use in grading base material when compacting. The grading blade is user movable relative to the plate compactor via a connection to a pivoting handle of the plate compactor or via a separate controller. The grading blade may be configured for use with a laser level and/or for remote control.

A machine for backfilling pavement material into a trench defined within a pavement surface includes a frame defining a longitudinal axis and having at least one wheel. The frame being configured to move along the pavement surface. A hopper supported on the frame and including an inlet opening configured to receive pavement material and an outlet opening configured to discharge pavement material into the trench. The machine also includes a compactor supported on the frame and aligned with the hopper along the longitudinal axis. The compactor is configured to compact the discharged pavement material within the trench.

A distance obtaining unit obtains the distance between a work implement and a design terrain. A work aspect determining unit determines a work aspect by the work implement. A limit velocity deciding unit limits the velocity of the work implement when the distance between the work implement and the design terrain becomes smaller. When the work aspect is surface compaction work and the distance between the work implement and the design terrain is within a first range of at least a portion that is equal to or less than a predetermined first distance, the limit velocity deciding unit increases the limit velocity of the work implement in comparison to when the work aspect is an aspect of a work other than surface compaction, or cancels the limiting of the velocity of the work implement.

The invention relates to a land leveling machine comprising a leveling box (1) made up of a front transverse support (2) and a rear transverse support (3), parallel to each other and in a horizontal position with respect to the ground, both supports being transverse in the direction of advance of the machine, both transverse supports (2,3) being also integral with each other by two longitudinal lateral supports (4); and where a plurality of scarifying or scraping elements (5) are accommodated on the front transverse support (1), horizontally aligned at their lower point with the lower surface of lateral skates (7) integrally attached to the longitudinal lateral supports (4) and with the lower edge of a leveling blade (6) integrally joined to the rear transverse support (3) by its lower part.

A rig mounted compactor is provided. The rig mounted compactor comprises a shaft rotatably arranged to cause vibration of the rig mounted compactor with a first amplitude and a second amplitude by means of a first weight and a second weight and a hydraulic motor arranged to drive the shaft. The first weight is eccentrically fixed to the shaft, and the second weight is eccentrically arranged at the shaft. The second weight is clutchable between an idle mode when driven in the direction, and a rotatable mode when driven in the direction. The second weight is arranged to idle with respect to the shaft in the idle mode. The shaft is arranged to cause the first amplitude of the vibration by the first weight in the idle mode, and the second weight is arranged to rotate synchronously with the shaft in the rotatable mode to cause the second amplitude of the vibration.

Systems and methods to provide pressed aggregate-filled cavities for improving ground stiffness and uniformity are disclosed. According to an aspect, a method includes using a mechanism to press into a ground surface in a substantially downward direction to create a concavity. The method also includes substantially or completely filling the concavity with unstabilized or chemically stabilized aggregate, soil, or sand. Further, the method includes using the mechanism to press the aggregate within the concavity to achieve a desired ground stiffness.

A skid steer rolling compactor attachment may include a universal attachment plate configured to attach to the skid steer. A boom includes a first end coupled to the attachment plate via a pivot hinge and a lift hinge. A hydraulic lift cylinder is coupled to the attachment plate and the boom in order to move the boom about the lift hinge, and a hydraulic pivot cylinder is coupled to the attachment plate and the boom in order to move the boom about the pivot hinge. A roller is attached to a second end of the boom via a tilt hinge and a twist hinge. A hydraulic tilt cylinder is coupled to the roller and the boom in order to move the roller about the tilt hinge, and a hydraulic twist cylinder is coupled to the roller and the boom in order to move the roller about the twist hinge.