While the YouTube video mentioned above gives one a good idea on rebuilding the Oberdorfer water pump, it falls short on installing the the graphite bearing that usually accompanies a rebuilding kit. In the above video, they recommend pounding this bearing with a hammer and that is a sure way to break this glass fragile part. A more successful method of installing this bearing is to apply a slow steady pressure and heavily lubricate it (WD-40) while it is being inserted into the pump body. We've found that applying this even pressure can easily be done with an eight inch 'C' clamp from Harbor Freight. The eight inch clamp easily accommodates the size pump body and greatly simplifies the installation of this fragile part into place.