Well, we were finished boon-docking, on our way home from the Spring Rally. After I brought in the bedroom slide with the remote, (I do this one by itself, while the cats are locked out of the bedroom, then I lock them in the bedroom while I do the other three slides because we don't want squashed kitties), I went outside to open the other slide valves and found hydraulic oil running down the side of my Monty! Damn!!! Took the knob off of the offending valve and found that the valve nut was loose on the manifold, so I tightened the nut and continued to bring in the rest of the slides, ...still leaking!! Probably lost over a full pint of oil. Disassembled the panel to find an o-ring pinched on the manifold/valve connection by my re-tightening of the nut, so, evidently it was loose enough for the o-ring to be hydraulically extruded out of position when it started leaking to begin with.
Lucky for me, I had loaded up my o-ring kit as part of my take along tool box. I am pretty sure that the slides would not have stayed closed for the 100 mile trip home if I had not had the o-ring kit with me.
Why on earth can't they tighten any of the nuts and bolts when they build these things?!?!?! If I was not mechanically inclined and had o-rings with me, it would have been a nervous trip through some winding mountain roads with a possibility of slides coming partially open, or, I guess we could have called a mobile mechanic out to the middle of nowhere and waited around for hours for him to show up and charge a bundle and a half for fixing something that shouldn't have gone wrong in the first place.
Note to self: Put a bottle or two of ATF in tool box!