Thanks for all the good information.
To follow up, I didn't realize that you had to have the PTO engaged for the hydraulics to work. Before I tried it again I drained the fluid and refilled it with new. When I tried the lift it worked, but how do you get it down again? I hung a weight on it thinking maybe it would pull down, but it didn't budge. Something else I'm doing wrong? Maybe I need a heavier weight, I just used a tire and rim.
Thanks for any help you can give.