Quote Originally Posted by oldford1700 View Post
When I went to fix it, it miraculaously was working, BUT the filter was filthy so I'm guessing the problem was caused by fluid flow. Changed fluid, cleaned filter and all O rings and now works great - nice and smooth and more responsive than before. Always happy with simple fixes. Thanks for the all the info.

Success at last, anytime you find that it is not the Hyd pump for the old rig is good news.