A shaft has an outer circumferential surface provided with a recessed portion in which a cooling medium is accommodated. A roller is rotatable relative to the outer circumferential surface of the shaft. A radial sliding bearing supports the roller to be rotatable relative to the outer circumferential surface of the shaft. A floating seal includes a rotating-side member that is supported by the roller and a fixed-side member that slides together with the rotating-side member. In a radial direction of the shaft, the recessed portion faces: a sliding portion between the rotating-side member and the fixed-side member in the floating seal: and the radial sliding bearing.

A shaft has an outer circumferential surface provided with a recessed portion in which a cooling medium is accommodated. A roller is rotatable relative to the outer circumferential surface of the shaft. A radial sliding bearing supports the roller to be rotatable relative to the outer circumferential surface of the shaft. A floating seal includes a rotating-side member that is supported by the roller and a fixed-side member that slides together with the rotating-side member. In a radial direction of the shaft, the recessed portion faces: a sliding portion between the rotating-side member and the fixed-side member in the floating seal: and the radial sliding bearing.

A bushing assembly for a track assembly includes a first end element, a second end element, and a central element positioned between the first end element and the second end element. The central element may be interference fit or positioned between the first end element and the second end element, and the central element may include a greater hardness than the first and second end elements. The first end element, the second end element, and the central element form a bushing with a longitudinal opening extending longitudinally through the bushing.

A track system includes an attachment assembly including at least one of a first pivot defining a roll pivot axis, a second pivot defining a pitch pivot axis, and a third pivot defining a yaw pivot axis of the track system. A frame assembly is disposed laterally outwardly from the attachment assembly and connected to the attachment assembly. The track system further includes at least one actuator for pivoting the frame assembly about at least one of the roll and yaw pivot axes, and at least one monitoring for determining, at least indirectly, at least one of a state of the track system and a ground surface condition. The at least one monitoring sensor is communicating with a track system controller to control the operation of the at least one actuator based on the at least one of the state of the track system and the ground surface condition.

A track system includes an attachment assembly, a frame assembly connected to the attachment assembly including at least one wheel-bearing frame member. The track system further has leading and trailing idler wheel assemblies at least indirectly connected to the at least one wheel-bearing frame member, at least one support wheel assembly at least indirectly connected to the at least one wheel-bearing frame member, an endless track extending around the leading idler wheel assembly, the trailing idler wheel assembly, and the at least one support wheel assembly. At least one monitoring sensor connected to the endless track and including an array of sensing devices communicates with a track system controller for determining, at least indirectly, at least one of a state of the track system and a ground surface condition.

A labyrinth (32) is provided in a gap (22) formed between a fixed-side end surface (13E) of a fixed-side housing and a rotation-side end surface (15C) of a rotation-side housing (15). The labyrinth (32) is constituted by a fixed-side recessed part (13F), a fixed-side fitting projecting part (13G), a rotation-side fitting projecting part (15D), and a rotation-side recessed part (15E). First and second fabric-like members (33), (34) formed annularly by a fabric-like material are provided in the fixed-side recessed part (13F) and the rotation-side recessed part (15E), respectively. A grease accommodating space (35) in which grease (G) is filled is provided between the first fabric-like member (33) and the second fabric-like member (34).

A labyrinth (32) is provided in a gap (22) formed between a fixed-side end surface (13E) of a fixed-side housing and a rotation-side end surface (15C) of a rotation-side housing (15). The labyrinth (32) is constituted by a fixed-side recessed part (13F), a fixed-side fitting projecting part (13G), a rotation-side fitting projecting part (15D), and a rotation-side recessed part (15E). First and second fabric-like members (33), (34) formed annularly by a fabric-like material are provided in the fixed-side recessed part (13F) and the rotation-side recessed part (15E), respectively. A grease accommodating space (35) in which grease (G) is filled is provided between the first fabric-like member (33) and the second fabric-like member (34).

A rubber track, in particular for a road paver or a feeder vehicle, comprising at least one drive wheel and at least one guide wheel, which are placed on a carrier together with wheels arranged in pairs and a rubber track, wherein the wheels have rims, and wherein on a circumferential surface of the rims of the wheels a rubber lining is attached, wherein a guide cam is provided on an inner side of the rubber track, which guide cam is configured to penetrate into an intermediate space between two wheels located next to each other, wherein a contact surface of the wheels facing the guide cam has an insert detachably attached to the rims.

A rubber track, in particular for a road paver or a feeder vehicle, comprising at least one drive wheel and at least one guide wheel, which are placed on a carrier together with wheels arranged in pairs and a rubber track, wherein the wheels have rims, and wherein on a circumferential surface of the rims of the wheels a rubber lining is attached, wherein a guide cam is provided on an inner side of the rubber track, which guide cam is configured to penetrate into an intermediate space between two wheels located next to each other, wherein a contact surface of the wheels facing the guide cam has an insert detachably attached to the rims.

A track system for use with a vehicle includes an attachment assembly connectable to the chassis of the vehicle having a first pivot extending vertically and defining a yaw pivot axis of the track system, and a second pivot extending laterally and defining a pitch pivot axis of the track system. A frame assembly is disposed laterally outwardly from the attachment assembly and connected thereto. The frame assembly includes at least one wheel-bearing frame member. The track system further includes at least one actuator connected between the attachment assembly and the frame assembly for pivoting the frame assembly about the yaw pivot axis, a leading idler wheel assembly at least indirectly connected to the at least one wheel-bearing frame member, a trailing idler wheel assembly at least indirectly connected to the at least one wheel-bearing frame member, at least one support wheel assembly, and an endless track.