Hi William,
Just did that a few weeks ago with my z3200 service station.
What I would do, apart from what you mentioned, is clean the gears inside and the rails where the cap slides on. Then use vaseline or something like that to grease them again.
You access the gears by taking off the little motor that sits in the middle of the service station.
Also make sure that you clean the fan that sits against the service station.
Make sure that you remember how all the lines go that feed the ink from the caps into the spittoon.
It’s a dirty job, but not difficult.