GUIDE ROLLER DEVICE FOR CRAWLER VEHICLE

PROBLEM TO BE SOLVED: To prevent gall, seizure and the like from being generated between a roller and a thrust plate. SOLUTION: A roller 33 of an upper side roller device 31 is integrally formed of an outside large-diametric cylindrical part 34 and an inside small-diametric cylindrical part 35 using a metal material having self-lubricity such as cast iron. A flangeless bush 36 is formed into a cylindrical body. A thrust plate 38 is directly brought into slide-contact with an end face 35C of the small- diametric cylindrical part 35, and a lubricating oil from an oil reservoir 40 is introduced into a plate storing chamber 37 through a radial-directional oil pasage 39D between the thrust plate 38 and a lid body 39, so as to lubricate the plate 38. An axial-directional oil passage 41 is provided inside the cylindrical part 35 to communicate a space between the plate storing chamber 37 and a seal storing chamber 22 to lubricate also a floating seal 23 thereby.