Abstract: A mobile floor scrubber includes an orbital scrub head attached to a forward portion of its chassis. The scrubber head includes a rotary motor, an eccentric drive assembly and a floor engaging scrubbing pad which engages and cleans the floor. The eccentric drive mechanism introduces vibration in the orbital scrub head which is transferred to the chassis which reduces the energy used to perform the scrubbing task and reduces the operating efficiency of the floor scrubber. The floor scrubber further includes a cleaning fluid delivery system for providing a cleaning fluid to the scrubbing pad for application to the floor during the cleaning operation. The scrub head includes a first upper plate and a second lower plate arranged in vertically spaced relation, with both plates being generally planar and rectangular in shape.