Abstract: A suction dewatering system including a suction device adapted to be connected to a suction source and having a longitudinal opening therein through which suction is applied. A cover is provided for the device including at least two spaced lands to be mounted to the device with the space therebetween forming a slot in alignment with the longitudinal opening in the suction device. A wear strip is removably mounted on each land and has a wear surface thereon for a medium to be passed thereover for dewatering. At least one of the wear strips is adjustable so that the shifting of each adjustable strip in the longitudinal direction causes the strip to shift laterally and vary the slot width in the direction of travel of the medium across the wear surface and varying the dwell time of the medium over the slot to which suction is being applied. A cam arm longitudinally extends in a longitudinal track in the cover.