Yea I'm curious too, what is side loading as pertains to this?
So the back end of the cyclinders is pinned, and the front yoke is pinned.
Pressure is applied to the piston in both directions, out and in. Side pressure could be applied to the ends by binding, or to the shaft by misaligned end points.
However, that cap that is twisting is round, centered, and only receives hyd pressure when retracting. It does not get any rotational force, and only a small amount of side pressure from the piston if the piston is getting side forces. So, the cap the piston goes through doesn't get anything that would cause it to twist?
The barrel of the piston, outer pipe, gets hyd pressure, and can be flexed to the side if the cyclinders is getting side pressures - misaligned. But to me that would push the tube sideways, cause an end to leak, not twist the tube into a curl?
The rods holding the end caps to the barrel could be of different strengths and stretchiness, that is the most believable explanation here. But even that, would think oil would push through between the cap and barrel, and really wouldn't rotate one cap for any particular reason?
Hyd pressure pushes out in all directions, binding pins word create straight side pressures, failing rods would create leaks as they lengthened.
Omnidirectional hyd pressure, or misaligned/ binding side pressures in one direction, how does that convert into a twist?
As the piston shaft is free to rotate inside the end cap, I'm still lost what makes the end cap rotate around in a spiral here? where does the twist come from?
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