Hook Drive Gear - Riccar Part # 53741
-New replacement hook drive gear.
-Hole is 7.9 mm, 24 teeth.
-Part # 53741
-Fits Riccar models 1900, 1925, 2600, 2800, 2900, 2950, 3400, 3500, 3600, 4001, 4003, 414, 500, 515, 525, 555FA, 570, 571, 581, 591, 606, 666FA, 805, 806, 807, 808, 8400, 8500, 888, 906E, 9150, 9160, 9600, 9700, 9800, 9900, R650, R750, R916