Patent ID: 7766433

Claim:
An endless track chain, comprising: a first link, a second link, a third link, and a fourth link, and a cartridge joining the first and second links for relative rotation therebetween and the third and fourth links for relative rotation therebetween, the cartridge comprising a pin, a bushing disposed between the pin and the first and third links such that the bushing is fixed to the first link and the third link and receives the pin for relative rotation between the bushing and the pin, a first seal, a second seal, a first collar cooperating with the bushing to capture the first seal therebetween and disposed between the second link and the pin so as to be fixed to the second link and the pin, and a second collar cooperating with the bushing to capture the second seal therebetween and disposed between the fourth link and the pin so as to be fixed to the fourth link and the pin, the first collar and the second collar being distinct respectively from the second link and the fourth link, wherein an end of each of the first and second collars is axially even with a respective end of the pin.