Guide to Cummins ISX Anti-polishing Ring piston removal and replacement If you have worked on a Cummins ISX engine you will have figured out it is impossible to insert a piston with rings from the top of the liner. To install the piston rings, ATC7040 (fig 3) a piston ring compressor is required to install [...]The post Cummins ISX Anti-Polishing Ring Piston Removal and Replacement appeared first on Apex Tool Company.