Question about Plumbing
My small hydraulic pump lifts actuators up and down. Works fine on up but motor strains and cuts out on down.Have tried reversing lines but same thing.
With NO PREASURE on the hyd system or the cylinder ( brace it )unhook both hoses from the hyd cylinder and hook together ( may require a made up hose or special fitting ), then operate the system again. If it bogs down again you KNOW it's not a cylinder problem ( piston dammage, bent rod, piece of metal stuck in a cylinder port...) . With the hoses hooked up normaly, you possiably have a restriction on the rod side ( pressure down to the cylinder) of the control valve. I have seen a piece of piston stuck in the port fitting because it could not go by the spool. Or depending on allot of variables, you MAY have a " flow control valve " that will control the decent speed of the cylinder failing or out of adjustment ( fixed orficed check valve or manual gate ). these are normally in the barrel line of the cylinder, but that depends on the configuration of the cylinder.Good luck and be carefull!!!
Posted on May 19, 2009
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Posted on Jan 02, 2017
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