I used my 1975 3000 on the finishing mower the other day and the three point hitch tends to hiccup. Both at an idle and with RPM’s. I have done cylinder and piston changes one hundred series fords that did the same thing and I was wondering if this 3000 is similar. Also is there a valve someplace that could be the problem instead. The reason I ask is because the lift arms don't seem to leak down much when parked. Even over winter storage. All the older fords I have worked on leaked down almost overnight, that's why I am suspecting something else could be the problem. Any help would be appreciated.