There are two snap rings. One external, one internal. I disconnected the hoses then removed the external snap ring. Push in the glandhead(?) to expose the internal snap ring and remove. Use care not to scratch the cylinder bore. Pull the rod assy. out (watch that end, I gouged my leg when I pulled it out) and remove both glandheads from the rod. There are O-rings and seals on inner and outer diameters of the glandheads. I checked the rod and bore for nicks and scratches and made sure the were smooth. After the seals are installed, I lubricated the bore and seals liberally with hydraulic fluid and carefully inserted the assembly installing snap rings in reverse order. Sorry I couldn't get the pics loaded but it should make sense when you see it. HTH.

I just take loose the piston/rod side of the cylinder, leave the other end attached, leave hoses on.  Take outer retaining ring off, tap in that collar to expose a snap ring inside on the housing.  Pull out the piston/rod assembly.  There is a large nut on the end (new nut came with the AGCO kit).  Be careful on the piston seal, it has to stretch to get it over the piston then you have to compress it to get it in the housing.  I used a large O ring over the top of it with a hose clamp to compress it.  If you just used the hose clamp on it it would probably damage the seal. I set it in there and remove the clamp just before I slide it in.  All of them have worked great that way.