Ooooppsss, looked like we missed your question about relief valves. The steel ball inside of them should move freely in the automatic relief valves. That way, you do not have to rebuild them. I have used a paper clip unbent to free up the steel ball them before. Inspect the plastic and rubber rings on it to make sure they are in good shape. Also, make sure the hole at the top is not clogged. Hope you are back up and going soon!
Cub Cadet 123