- Remove filter head, open bayonet catch of impeller lid, remove defective impeller with axis and bearings and replace them with spare impeller and new bearings. - Complete kit with all replaceable parts - JBL pulling aid for impeller bearing facilitates the replacement of the bearings which are difficult to reach - Impeller always needs to be replaced together with axis and bearings - Contains: impeller with ceramic bearings, ceramic axis and rubber buffers