hyd problems

Thought I'd run this by you all.  I have addressed the problem with the constant purging of hyd oil from the vent by adding a 3' line and building a separate reservoir mounted close to the top of the roll over bar.  Made it from 4″ PVC, two caps on the end. line goes into the bottom and a vent tube at the top.  My system creates so much air that this type of mod was needed.  I can’t seem to keep the hyd oil in the tractor anymore.  No matter what I do it vents into my mod and then vents out of that causing a mess all the time.  I keep my oil at the correct amount but always seem to have to add more because of all the venting.  Most importantly…there is a ton of air bubbles in the hyd oil all the time.  I can’t find a leak anywhere!

Within the past couple of weeks as I'm trying to skid trees out of the woods, I noticed I am lacking a ton of power from my 3 pt hitch.  it barely picks a log up anymore. I think the loader is lacking too and the power steering seems to lag a lot. I changed the filter and made sure my knob under the seat was set ok but the only thing I can think of is that my pump is going bad…even so…where are all the air bubbles coming from and why on earth does it vent so much???