Abstract: A trolley wheel assembly (10) securely sealed to prevent loss of lubricant therefrom and entrance of contaminants therein. The assembly (10) comprises an inner race (12) disposed about an axis of rotation (14) and an outer race (16) concentrically disposed in a spaced relationship about the inner race (12). A plurality of ball bearings (18) are disposed between the inner race (12) and the outer race (16). An outer sealing ring (20) extends radially inwardly from the outer race (16) toward the inner race (12). An inner sealing ring (22) is rotatably disposed about the inner race (12), extending radially outwardly and contiguous the outer sealing ring (20). A wave washer (24) disposed about the inner race (12) biases the inner sealing ring (22) into constant friction engagement with the outer sealing ring (20). A plurality of backup inner sealing rings (26,27) provide a secondary seal about the inner race (12).

Abstract: A trolley wheel assembly (10,100) includes a wheel member (18,118) and a support pin (12) defining an axis of rotation. A mounting sleeve 922,122) is fixedly secured about the support pin (12). Bearing sleeve halves (30,32,130,132) are disposed about the mounting sleeve (22,122) for allowing rotation of the wheel member (18,118) about the axis of rotation. Further, a method of replacing a worn trolley wheel includes the steps of removing the worn trolley wheel from the support pin (12), mounting a bearing sleeve 926,126) over a mounting sleeve (22,122) for allowing rotation of the wheel member 918,118) relative to the axis of rotation when the mounting sleeve (22) is mounted on the support pin (12), and mounting an unworn wheel member (18) about the bearing sleeve (26) for rotation relative thereto, and fixedly securing the mounting sleeve (22) about the support pin (12).