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Hydraulic cyclinder

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andy

03-27-2001 19:53:42




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i have a 6 inch dia. cylinder i trying to rebuild. of course its old, but i can't get the shaft out of the cylinder. it is completely empty of fluid but when i try to pull it out it hangs up two thirds of the way out. up to that point it is free and easy to move. anybody have any ideas.




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Bob 2 (PA)

03-31-2001 19:37:21




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 Re: hydraulic cyclinder in reply to andy, 03-27-2001 19:53:42  
Andy, Make sure there are no dents in the barrel then either use your hydraulics to push it out or take chain and ratchet type binder hook to the cylinder with a clevis and pull it apart. Watch not to use to much force and try to pull as straight as possible. You should not use compressed air because it is unstable and dangerous. Also if you use the binder method make sure your hyd lines are dissconnected.

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rodger

03-30-2001 04:38:52




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 Re: hydraulic cyclinder in reply to andy, 03-27-2001 19:53:42  
Was the cylinder piston fully extending prior to dismantling? If it were mine, I'd try using very low air pressure to "push" it out of the cylinder. If the cylinder isn't bent, I don't know why it wouldn't come fully out. Also, I'm assuming that you have disconnected the hydraulic lines, so that you are not pulling against a vaccuum, when trying to manually pull it out.
Another option would be to hook up hydraulics and reassemble it; push it fully extended with hydraulics and then disassemble. This probably means draining hydraulics differently, but this may be the safest way to get it out, and the least likely to cause piston damage.

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jerry gerthofer

03-28-2001 11:08:21




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 Re: hydraulic cyclinder in reply to andy, 03-27-2001 19:53:42  
check for small dents on or around the barrel. some thing must be damaged



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Len Sholes

03-28-2001 08:41:04




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 Re: hydraulic cyclinder in reply to andy, 03-27-2001 19:53:42  
I would be checking the cylinder barrel to see if it has been damaged from something hitting it externally and causing it to bend inwards. It doesn't take much. This is the only thing that I can think of that would cause the problem you describe.



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