Patent ID: 7959239

Claim:
A track assembly for a machine comprising: a first chain assembly: a track pin; a second chain assembly wherein the track pin couples the second chain assembly with the first chain assembly, the first and second chain assemblies each including an inner track link and an outer track link, wherein the inner track link includes a shoulder; a rotatable bushing positioned about the track pin; a sleeve bearing disposed within a first bore of the inner track link and positioned about the track pin, wherein the sleeve bearing is disposed to transfer axial loads to the shoulder; a first seal member disposed between the inner track link and the rotatable bushing; a second seal member disposed between the inner and outer track links; a first thrust ring positioned about the track pin and engaged with the rotatable bushing; a second thrust ring disposed about the track pin and engaged with the sleeve bearing; and a first contact member engaged with the first seal member and a second contact member fastened to either the inner track link or the outer track link and engaged with the second seal member, the first and second contact members configured to inhibit wear of the first and second seal members.