Maggie’s Motivational Pic Thread v2.0 - - New Rules - See Post #1

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That looks like a cylinder from a Palfinger crane. Don't know HowTH they had so much trapped pressure with no hyd lines hooked up. All he had to do was "threaten" it with that hammer.

Thermal expansion. If the ports were plugged, it had oil inside, and it sat in the sun...it will build a lot of pressure and being such a big cylinder you will get what you saw there. Force = Pressure X Area

For example, when a shop runs hose reel type lubrication dispensers they sometimes blow up the filters on those because they run the lines up by the ceiling (hotter up there) or the lines lay out on the concrete and the sun bakes them. The hydraulic hoses can handle the thermal expansion pressure increase but the filter on the circuit can not and the filter can will burst. This one example of many, people don't realize that thermal expansion builds a LOT of pressure.
 
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I thought they had safety valves to maintain pressure in case of line failure.
They do have "load holding valves" that must be Hydraulically released by a signal pressure much like an electrical relay circuit. I suppose they must have charged the cylinder with compressed air in order to extend it. Then proceeded to disassemble the end cap not realizing the cylinder was still pressured up? That guy didn't even touch it yet with that hammer.
 
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They do have "load holding valves" that must be Hydraulically released by a signal pressure much like an electrical relay circuit. I suppose they must have charged the cylinder with compressed air in order to extend it. Then proceeded to disassemble the end cap not realizing the cylinder was still pressured up? That guy didn't even touch it yet with that hammer.

Oh yeah, that would not be smart! If they put air pressure in to extend it, great but open the return side so the pressure doesn't get trapped in! Now I'm curious as to what they did there. (I added to my post above)
 
Oh yeah, that would not be smart! If they put air pressure in to extend it, great but open the return side so the pressure doesn't get trapped in! Now I'm curious as to what they did there. (I added to my post above)
Contributing evidence is the lack of a huge flood of hydraulic oil when it blows apart. That barrel should haven been full of oil if it had been extended hydraulically. ETA: your theory of thermal expansion would be far more effective with the cylinder full of air and a small amount of residual oil as opposed to full of hyd oil as well.
 
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C130 ramp cylinder overhaul calls for a final test of 8000psi applied to port A and B simultaneously, one of my guys could not figure out how to do that so pressurised the retract port, locked it off and then pressurised the extend port. I had to get the wall of our test facility replaced, and the wall of the building across the road. Luckily no one was injured but many sets of underwear needed replacing that day.
 
C130 ramp cylinder overhaul calls for a final test of 8000psi applied to port A and B simultaneously, one of my guys could not figure out how to do that so pressurised the retract port, locked it off and then pressurised the extend port. I had to get the wall of our test facility replaced, and the wall of the building across the road. Luckily no one was injured but many sets of underwear needed replacing that day.
Hydraulic rail gun?
 
I got less than a minute into that and I regret every second of that. What the shit, fuck, hell was that?????

I watched the whole thing to make sure it didn't violate the no pink rule. I tried to keep my eyes open for most of it. I think I'm going to church tomorrow. Have not gone in years. If you do watch the whole thing it will change your life. Just make sure your wife doesn't catch you watching it.
 
I watched the whole thing to make sure it didn't violate the no pink rule. I tried to keep my eyes open for most of it. I think I'm going to church tomorrow. Have not gone in years. If you do watch the whole thing it will change your life. Just make sure your wife doesn't catch you watching it.

Totally amateur level self obsessed barely interesting performance.
Typical of over aged snowflakes who think their little boring ideas are so "edgy".