Hi all, new here. Just picked up an 86 743. It's in decent shape, needs some love. The first thing on my list is an issue with the lift arms drifting down. The hydraulic power seems to be fine although I haven't had a chance to load the bucket down yet, however when I raise the lift arms they start to drop as soon as i let off the pedal. I know it's low on hydraulic fluid and I need to change it. Other than that I don't see any obvious signs of leaks. Could that be a symptom of a valve spool needing seals? The lift cylinders don't show signs of leaking. Just hoping someone can point me in the right direction. Thanks