clemsonfor
Super Member
The closed lockout valve under the seat will not hold the lift arms with load when the engine is shut off. I also notice some hydraulic fluid tends to leak under one of the end caps where the lift arm attaches to the shaft.
Mine did this as well until recent ( I think I fixed it). There is just an O ring under those lift arms, and that fluid is not under pressure there it just splashes up and is just in that compartment (as described by HOye and which I knew there was no pressure on those) . Its more to seal out water entry than anything. But its just like a $0.75 O ring that is behind that cover plate on the outside. When you buy parts get 2 of those and take that bolt of the end of the arm and pull the arm off to get the old oring out or dig it out with a pick and put it all back on there including the washer on the shaft and put your oring in there and put the cap and bolt back on. Once you know what your doing it can be done in less than 10 mins a side.
And from your description yes your cylinder O ring is shot.