I found the slot. Thanks. I was able to get the retainer out and the end cap and seals will come out approximately 1/4 inch and then will move no further out of the cylinder. I have tried pushing the piston out of the cylinder but it seems to be against a stop of some sort within the cylinder. I have tried taping on the piston shaft but it moves to the end of travel and then hits a solid stop.The drawing I have of the cylinder does not show anything that should cause it to stop. I do not want to damage the cylinder or shaft. Is it okay to force the poston out or how do I get the shaft seals out.