An idler for an undercarriage system in a track-type machine includes an idler rim having an outer rim surface extending circumferentially around an idler axis of rotation and forming a centrally located guide flange. The outer rim surface further forms a first ring channel and a second ring channel upon a first axial side and a second axial side of the centrally located guide flange, respectively. A first sacrificial wear ring is seated in the first ring channel and a second sacrificial wear ring is seated in the second ring channel.

A sealed and lubricated rotatable track engaging element includes a roller and a roller shaft extending through the roller to support the roller for rotation about a major axis. A first thrust surface is fixed relative to the roller, and a second thrust surface is fixed relative to the roller shaft. A seal cavity extends between the roller and the roller shaft and is formed in part by each of the first thrust surface and the second thrust surface, and a thrust washer stack is within the seal cavity and trapped between the first thrust surface and the second thrust surface. The thrust washer stack includes an inner thrust washer contacting the roller to rotate at a first fractional speed of a speed of rotation of the roller, and an outer thrust washer contacting the inner thrust washer and the collar to rotate at a second fractional speed that is less than the first fractional speed.

A sealed and lubricated rotatable track engaging element includes a roller and a roller shaft extending through the roller to support the roller for rotation about a major axis. A first thrust surface is fixed relative to the roller, and a second thrust surface is fixed relative to the roller shaft. A seal cavity extends between the roller and the roller shaft and is formed in part by each of the first thrust surface and the second thrust surface, and a thrust washer stack is within the seal cavity and trapped between the first thrust surface and the second thrust surface. The thrust washer stack includes an inner thrust washer contacting the roller to rotate at a first fractional speed of a speed of rotation of the roller, and an outer thrust washer contacting the inner thrust washer and the collar to rotate at a second fractional speed that is less than the first fractional speed.

A work machine may include an drive frame, a drivable track coupled to the drive frame, an idler wheel coupled to the drive frame to facilitate movement of the drivable track, and a wheel weight coupleable to the idler wheel. The wheel weight may be coupled to the idler wheel without removing the idler wheel from the drive frame.

A work machine may include an drive frame, a drivable track coupled to the drive frame, an idler wheel coupled to the drive frame to facilitate movement of the drivable track, and a wheel weight coupleable to the idler wheel. The wheel weight may be coupled to the idler wheel without removing the idler wheel from the drive frame.

A track roller assembly may have a track roller, a roller shaft and collars press fit onto either end of the roller shaft to retain the track roller on the roller shaft with an axial clearance between the collars and the track roller. During assembly, the collars may be press fit onto the shaft ends and forced axially inwardly until further axial movement of the collars is prevented by engagement shoulders of the track roller. A compressive axial load may be applied to the roller shaft to reduce a shaft length of the roller shaft and to cause the roller shaft to slide inwardly relative to the collars. The compressive axial load is removed from the roller shaft so that the roller shaft extends back to the normal shaft length and the collars move axially farther apart as the roller shaft extends back to the normal shaft length.

A track roller assembly may have a track roller, a roller shaft and collars press fit onto either end of the roller shaft to retain the track roller on the roller shaft with an axial clearance between the collars and the track roller. During assembly, the collars may be press fit onto the shaft ends and forced axially inwardly until further axial movement of the collars is prevented by engagement shoulders of the track roller. A compressive axial load may be applied to the roller shaft to reduce a shaft length of the roller shaft and to cause the roller shaft to slide inwardly relative to the collars. The compressive axial load is removed from the roller shaft so that the roller shaft extends back to the normal shaft length and the collars move axially farther apart as the roller shaft extends back to the normal shaft length.

A work machine may include an electric motor, an idler wheel, a drivable track engaged with the idler wheel, and an actuator that is electrically powered by the electric motor and configured to move the idler wheel to adjust the tension in the drivable track based on the torque output of the electric motor. The work machine also includes a controller configured to automatically control the electrical current input to the electric motor based on one or more monitored control factors associated with the work machine.

A work machine may include an electric motor, an idler wheel, a drivable track engaged with the idler wheel, and an actuator that is electrically powered by the electric motor and configured to move the idler wheel to adjust the tension in the drivable track based on the torque output of the electric motor. The work machine also includes a controller configured to automatically control the electrical current input to the electric motor based on one or more monitored control factors associated with the work machine.

A system comprises a track a track roller. In some examples, the track roller comprises an axle member and at least three flange members. The axle member defines a first axis. The at least three flange members extend from the axle member substantially perpendicularly to the first axis. A first portion of the axle member is disposed between a first pair of adjacent flange members of the at least three flange members. A second portion of the axle member is disposed between a second pair of adjacent flange members of the at least three flange members. Each of at least two of the at least three flange members and the first and second portions are configured to contact the track when the track is mounted on a vehicle suspension system including the track roller.