Thanks to Scrivet, Rudi and Engene for help on the white froth/gunk thread. The question has turned into something purely about the hydraulic system so I think a new post makes sense.
I've read the TC specs quite a bit -- not claiming to understand them 100%, but I am aware that exceeding them is no good so I found a scale and I plan to do the math on everything to make sure weight on the hydraulic rockshaft is going to be okay.
But, how about this -- the max weight off the rear is 600lbs, says GSS-1024. Well, turns out my system could only lift 400
If I tried to lift 450lbs that's not over the max, and so internal components should be okay? I'm thinking a concern is a check valve might be hurt if lifting over 600lbs, or something like that?
Just to say, I'm not planning on getting right up to 600lbs and I'll leave a good safety margin. But if I max out my current capability of 400lbs, like by trying to lift 450lbs, does anything happen since that's well under the system's rated max? I don't mean leaving it struggling, I just mean trying to lift and immediately putting it down when I see "oops it's too heavy."
And in any case, it's clear what I need: A HELPER SPRING! It seems that the job of the fast hitch helper spring is to reduce the load on the hydraulic rockshaft by cancelling out the added downward force/weight of the fast hitch. Is there a reason this wouldn't work for anything that's attached to the hydraulics, front or rear? Theoretically something could be too *light* and so the system has to do extra work just to extend the spring, but I'd be aware of that and not use the helper spring in that case.
The real question: Does a helper spring allow the hydraulics to lift something that was otherwise too heavy, OR does it just make an *easier* lift out of things that were possible to lift, without the spring? The reason I ask is that when the front rockshaft is rotated back (down) as far as it goes,the helper spring arm seems to point directly at the helper spring bracket between transmission+fender. Which means that when an implement is all the way down, it seems the spring is not being much help in pushing the rockshaft back up, since most of its force is directly in line with the rockshaft helper spring arm. Maybe that's the point, since as the spring compresses it exerts more and more force, and so the rockshaft design modulates that...
Anyway, I'd appreciate any helper spring thoughts.