On my "steer" cylinders, which are single action cylinders, the hydraulic guy took the hose off, and used a tool (don't remember if it was a pair of pliers or a screwdriver) to pop something loose on the end of the cylinder. Then the whole guts came right out. Install was even easier. He matched up the seals, after JD sent me the wrong kit for $130, and only charged me $40 for everything. The other one, he came out to the house so I wouldn't have to remove it from the tractor.
David from jax