Norelco 8100 Series Motor/Drive/Gear Assembly For models numbered: 8175XL, 8171XL, 8170XL, 8160XL, 8160XLCC, 8150XL, 8151XL, 8140XL, 8138XL, HQ8173, HQ8172, HQ8170 HQ8160, HQ8150, HQ8140, HQ8100