A ground-engaging track system includes a track roller having a roller shell with an outer tread surface, and a roller shaft supporting the roller shell for rotation and cantilevering the track roller to a track roller frame. The track roller is positionable in the track system to contact only one of a first track rail or a second rail in a ground-engaging track.

A track shoe cover may include a roller engaging surface and a shoe engaging surface. The shoe engaging surface may include a shoe engaging recess defined on at least two opposite sides by a set of side walls, and a respective attachment groove included in the set of side walls. The respective attachment groove may be configured to facilitate mechanical connection of the track shoe cover and a crawler shoe.

A track shoe cover may include a roller engaging surface and a shoe engaging surface. The shoe engaging surface may include a shoe engaging recess defined on at least two opposite sides by a set of side walls, and a respective attachment groove included in the set of side walls. The respective attachment groove may be configured to facilitate mechanical connection of the track shoe cover and a crawler shoe.

A seal assembly for sealing a lubricant space that is formed between a pin, a track shoe pressed-on onto one end of the pin, and a sleeve of a track. The sleeve is pushed onto the pin and is swivelable on the pin. The track further includes at least one second track shoe pressed onto one end of the sleeve. The seal assembly provides a first seal ring for sealing the lubricant space between the sleeve and the first track shoe, and an elastic ring for applying pressure to the first seal ring. The seal assembly further provides a second seal ring for sealing the lubricant space between sleeve and the first track shoe and/or the pin.

A bushing for a track assembly includes a tubular bushing substrate having a longitudinal length and an outer surface. The outer surface includes at least one flat portion. The bushing also includes at least one white iron member. The at least one white iron member includes a flat inner surface, and the flat inner surface of the at least one white iron member is fixed to the flat portion of the outer surface of the tubular bushing substrate.

A bushing for a track assembly includes a tubular bushing substrate having a longitudinal length and an outer surface. The outer surface includes at least one flat portion. The bushing also includes at least one white iron member. The at least one white iron member includes a flat inner surface, and the flat inner surface of the at least one white iron member is fixed to the flat portion of the outer surface of the tubular bushing substrate.

A ground-engaging track system includes a track having a first track chain and a second track chain, and an idler having pockets formed in an outer idler rim to receive inboard rail protrusions on track links in the first track chain and the second track chain. The inboard rail protrusions project from an inboard link side, and a central pad of an upper rail surface in the track link includes an anti-scalloping bump-out formed on the inboard rail protrusion.

A ground-engaging track system includes a track having a first track chain and a second track chain, and an idler having pockets formed in an outer idler rim to receive inboard rail protrusions on track links in the first track chain and the second track chain. The inboard rail protrusions project from an inboard link side, and a central pad of an upper rail surface in the track link includes an anti-scalloping bump-out formed on the inboard rail protrusion.

A track joint assembly includes a first track chain and a second track chain, and a track pin including a first pin end, a second pin end, and a center section. A track guiding space extends between the first track chain and the second track chain. The center section of the track pin has an enlarged diameter, relative to first and second pin ends, and an outer wear surface exposed to the track guiding space. The outer wear surface may directly contact a rotatable track-engaging element in a ground-engaging track system, such as a sprocket.

A track joint assembly includes a first track chain and a second track chain, and a track pin including a first pin end, a second pin end, and a center section. A track guiding space extends between the first track chain and the second track chain. The center section of the track pin has an enlarged diameter, relative to first and second pin ends, and an outer wear surface exposed to the track guiding space. The outer wear surface may directly contact a rotatable track-engaging element in a ground-engaging track system, such as a sprocket.