A floor sweeper includes a housing and wheels rotatably mounted on the housing for supporting the housing on a subjacent surface. A brush roll is rotatably mounted on the housing. A pair of gear cartridge members are located on opposite sides of the housing. Each of the gear cartridge members includes a first planetary gear train including a sun gear coupled to a respective end of the brush roll, a gear ring encircling the sun gear and a plurality of planet gears engaging both the sun gear and gear ring. A first drive wheel is coupled to the gear ring and a casing encloses the first planetary gear train.