Track roller for undercarriage system having inverted seal, and roller rim for same

A track roller for a ground-engaging track system comprising:

• a roller body including an outer tread surface, and an inner surface forming a first seal bore, a second seal bore, and a shaft bore defining a roller axis and extending between the first seal bore and the second seal bore;
• a roller shaft;
• a seal assembly including an outer seal carrier within the first seal bore and fixed to rotate with the roller body about the roller shaft, and a face seal;
• the face seal including an outer seal ring and an outer seal element, supported in the outer seal carrier, and an inner seal ring and an inner seal element, and the outer seal element is radially inward of the outer seal ring and squeezed in radial compression between the outer seal ring and the outer seal carrier.

A body for a track roller in an undercarriage system comprising:

• a roller shell defining a roller axis extending between a first roller shell axial end and a second roller shell axial end, and including an outer tread surface extending circumferentially around the roller axis and axially between a first roller shell end flange and a second roller shell end flange;
• the roller shell further including a first seal bore formed in the first roller shell axial end, a second seal bore formed in the second roller shell axial end, and a shaft bore extending axially between the first seal bore and the second seal bore and circumferentially around the roller shell axis;
• the roller shell further including a centrally located oil cavity in communication with the shaft bore, a first inside bearing surface exposed to the shaft bore and extending axially from the oil cavity to the first seal bore, and a second inside bearing surface exposed to the shaft bore and extending axially from the oil cavity to the second seal bore;
• and
• the roller shell further including a first oil channel and a second oil channel, each formed radially outward of the shaft bore, and extending axially between the oil cavity and the first seal bore and the second seal bore, respectively.