Rebuild swing cylinders 580-CK

This is my first-ever post on this forum, after trying for months to get signed up. FWIW: won't work on Linux computers.

I need to have the swing cylinders repacked on my 1966 580-CK. The hydraulic shop fellow recommended I just pull the rods and pistons rather than try to remove whole cylinders. I have some questions about "best practices."

One thread on another forum recommends centering the boom and doing both cylinders at once, but on another the advice is to do them one at a time,...

Rebuild swing cylinders 580-CK

Rebuild swing cylinders 580-CK