I have this old 1206 that only gets occasional use. I started it the other day intending to use the Koker front end bucket and the hydraulics that control it were dead. I checked the fluid and it is OK. It has always required the lift for the 3 point to be in a certain position before the end loader would work. I"m thinking that there is a leaking valve that is causing this since when I try to raise the bucket the lift arms move a little. It will eventually start to raise but it is very slow and jerky. Any ideas if my assumption is correct and where is this valve located? Thanks.