The manipulations described on this site should only be carried out by persons with the necessary mechanical knowledge and equipment. 

The injection pump is precision equipment that can be partially or totally destroyed in case of bad disassembly/assembly. 

In order to avoid damage to the pump and the motor the operations described below are only possible if followed by control and adjustment of the pump by a professional once the repair is complete. 

The webmaster of www.headseal.com and the author of this article disclaim any liability for the use you make of the information provided on this site, the information provided does not replace the workshop manual published by the manufacturer.