I finally have my mcCormick 33 loader mounted my M now. Raises up really good, holds good, no leaks just does not lower smoothly. I have to push in with a bit of force on lever on JUST the last about 2in inches, then drops like a rock. they are replacement cylinders off a schwartz. I believe they had regular hydraulic fluid them so I switched my M to that, 6qts. I had 30 in it. tried to fill lines back up etc. read some post from a few yrs ago. don't think rod is bent or anything of that sort as it moves freely that last couple inches with tractor off. Tractor sat long time unused. likely been since the 60s since pump last used, but had very clean oil in pump when i got it running in 2016. what to check? thanks