A ripper device includes a first cylinder, a shank, and an arm. The first cylinder includes a tube and a rod, and is disposed to extend and retract in the forward and backward direction in a plan view of the ripper device. The shank is disposed aligned with the first cylinder in the forward and backward direction in the plan view. The arm supports the shank and overlaps the tube of the first cylinder in the plan view.

A ripper device includes a first cylinder, a shank, and an arm. The first cylinder includes a tube and a rod, and is disposed to extend and retract in the forward and backward direction in a plan view of the ripper device. The shank is disposed aligned with the first cylinder in the forward and backward direction in the plan view. The arm supports the shank and overlaps the tube of the first cylinder in the plan view.

An example bushing of a hydraulic hammer tool includes a bulk region and an inner region. The inner region has a relatively greater hardness than the bulk region. The inner region may also be compressively stressed, while the bulk region may have tensile stress. The stress and/or hardness profile of the bushing may enhance its resistance to wear and galling defects when a hammer of the hydraulic hammer tool is held in alignment by the bushing. The bulk region of the bushing may be relatively soft, resulting in the bushing having a relatively high level of toughness. The bushing may be formed using medium to high carbon steel by rough forming the bushing, hardening the bushing, tempering the bushing, induction hardening the inner region of the bushing, and then quenching the inner region.

Provided is an arrangement that attaches a ground-engaging tool (GET) to an adapter on support structure of ground/earth engaging/conditioning apparatus. A retainer is in a recess of the adapter. A fastener is received through the GET aperture and into the adapter aperture. The head of the fastener can be within a recess of the GET. The recess can be multi lobed/shaped to receive the retainer and prevent rotation or other torsional/lateral deformation of the retainer when tightening/inserting the fastener. A fastener has a first threaded portion adjacent the head of the fastener and a second threaded portion along a shaft portion of the fastener extending distal from the head. The first threaded portion can be wider and/or of a more coarse thread pitch than the second threaded portion.

Provided is an arrangement that attaches a ground-engaging tool (GET) to an adapter on support structure of ground/earth engaging/conditioning apparatus. A retainer is in a recess of the adapter. A fastener is received through the GET aperture and into the adapter aperture. The head of the fastener can be within a recess of the GET. The recess can be multi lobed/shaped to receive the retainer and prevent rotation or other torsional/lateral deformation of the retainer when tightening/inserting the fastener. A fastener has a first threaded portion adjacent the head of the fastener and a second threaded portion along a shaft portion of the fastener extending distal from the head. The first threaded portion can be wider and/or of a more coarse thread pitch than the second threaded portion.

A ripper assembly for a machine includes a main ripper unit and at least one auxiliary ripper unit. The main ripper unit is adapted to be coupled to a frame of the machine and is moveable relative to the frame along a height of the machine. The main ripper unit includes a main ripper. The auxiliary ripper unit is pivotably coupled to the main ripper unit, and is pivotable infinitely between a first position and a second position with respect to the main ripper unit. A distance between the main ripper unit and the auxiliary ripper unit, defined laterally in relation to a direction of travel of the machine, varies as the auxiliary ripper unit pivots from the first position to the second position.

A ripper assembly for a machine includes a main ripper unit and at least one auxiliary ripper unit. The main ripper unit is adapted to be coupled to a frame of the machine and is moveable relative to the frame along a height of the machine. The main ripper unit includes a main ripper. The auxiliary ripper unit is pivotably coupled to the main ripper unit, and is pivotable infinitely between a first position and a second position with respect to the main ripper unit. A distance between the main ripper unit and the auxiliary ripper unit, defined laterally in relation to a direction of travel of the machine, varies as the auxiliary ripper unit pivots from the first position to the second position.

A robotic vehicle for moving above ground while fabricating a subsurface polymer layer to protect an underground structure is provided. The robotic vehicle includes: a body; a rotational member that contacts the ground and moves the body over the ground; a ripper assembly having a proximal end that moves with the body, and a distal end that moves underground at a fabrication depth in response to the movement of the proximal end while fabricating the polymer layer; a ground penetrating radar (GPR) that locates and measures a depth of the underground structure below the ground; and a computerized control system that controls the rotational member, the distal end of the ripper assembly, and the GPR to move the body over the located underground structure while tracking the location of the underground structure and fabricating the polymer layer at the fabrication depth and above the measured depth of the underground structure.

An ID tag is disposed on a plurality of components of a machine. A controller stores a usage threshold for each component, receives signals from an ID tag reader, and associates an identification number from each ID tag with a component of the machine. The controller determines previous usage data for each component, determines an extent of usage of the machine since generation of the previous usage data, determines current usage data for each component based upon the extent of usage of the machine and the previous usage data, and compares the current usage data for each component to the usage threshold for each component. The controller generates an alert for each component in which the current usage data for that component exceeds its usage threshold and transmits the alert to a system remote from the machine.

A ripper device for a work vehicle includes a first cylinder, a shank, and a second cylinder. The shank is actuated by the first cylinder and is aligned with the first cylinder in plan view. The second cylinder includes a proximal end attached to the work vehicle and a distal end on the opposite side from the proximal end. The second cylinder actuates the shank. The proximal end and the distal end of the second cylinder are located higher than the first cylinder in side view. The diameter of the first cylinder is larger than the diameter of the second cylinder.