It looks like that cylinder end is threaded in. It would take a spanner wrench that can grab those projections on the end cap to get it loose. Good luck finding a seal once you get it apart!
Jerry
Edit: If fluid is getting to that side of the piston, the piston packing is also leaking. There should be little, if any fluid up there. The "seal" around the shaft is probably nothing more than a dust wiper.
Jerry
Last edited by Hotrod Lincoln; 03/19/2011 1:49 AM.