22 English 5.906-468.0 Rev. 00 (02/09)The drive unit consists of a differential gear and an attached drivemotor.Î Disconnect the connecting cable of the drive motor from thepower supply.Î Support the drive unit and secure it against falling down.Î Remove the fastening screws from the left and right bearingblock.Î Remove the drive unit.Î Assemble the drive unit in the reverse sequence.1 Bearing blocks to attach the drive unit2 Differential gear3 Fastening screws (2x), left bearing block4 Fastening screws (2x), right bearing blockÎ Release the screw for locking the tank and swing up the tank.Î Remove the lid of the connector cover on the brush head.Î Disconnect the connection plug.Î Disconnect the connecting coupling of the water supply.5.6 Remove the drive unit 5.7 Remove the BD brush head