ill tell you exactly what to do.
if you have inspected the orings and there in perfect condition, Take them and get your self some Power steering fluid with o-ring restore. Should say it right on the front of the bottle.
Take a little cup, and pour a lil bit of power steering fluid with o-ring restore in the cup and drop ur orings in there, leave them there for 24 hours and then pull them out and then reinstall them. Ull notice they are harder to install, Because the oring restore caused them to swell.
Or you can take the easy route and get a dripper, and Drip like 4 or 5 drips into the top mag while your pushing the valve open on the back of the mag. let it sit for a few hours standing on the bottom, then flip it over and let it sit to get all the o-rings and seals.
Then after 24 hours of sitting, get your self some hot water, and remove the rear valve, and pour it in. shake it around for a few and pour it out. and repeat that a few times to get the excess power steering fluid out.
Fill it up and test it out!
I'v been using this method for about 4 years works great every time.