Abstract: Where successive track links are connected together, each of a pair of first links has a radial end wall with an annular recess. A cylindrical tubular pin is firmly press-fitted into cylindrical openings through each first link. Into each of a pair of second links is press-fitted an annular bushing that surrounds the pin with clearance. An elastomeric annular lubricant sealing member is retained in each annular recess in a leak-tight fit. Each sealing member has an end face with an outer radial portion substantially in the same plane as the first links' radial end wall and has a radially inner portion, providing a lip which, before installation, has an edge lying axially beyond the plane of that radial end wall, and which, after installation, is in rotary sealing engagement with a radial wall of the bushing and is pushed approximately to the plane of the radial end wall.