Bottom Thrust Bearing - 9968002 Models 4610, 5110, 5120, 5130, 5140, 5150, 555, 5610, 5640, 5640, 6410, 6610, 6640, 6640, 6810, 685, 745S, 7610, 7710, 7740, 7740, 7810, 7840, 7840, 785, 7910, 8240, 8240, 8340, 8340, 844, 885, 895, 985, 995, CS100, CS110, CS120, MX100, MX100C, MX110, MX120, MX135, MX150, MX170, MX90C