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[Modern View]

JMOR 02-12-2013 17:12:18 72.181.173.171 Report to Moderator

Quoting Removed, click Modern View to seeThe reason that I suggested the check valve, is that it should not open & allow any flow to lift cylinder below 115PSI (equivalent to ~75 # lift force) and the back pressure valve sets steady state non-lift/hold pressure at ~40PSI (equiv to ~25# force), so a non-commanded lift condition should not see the minimal lift force that you have unless the check valve is leaking. If the control valve is somehow commanding lift when you are not (with touch control lever), as with a mis-adjusted linkage, that should slam the unloader valve to full lift condition, thereby yielding ~1250 # lift force. Since unloader is not variable, but rather full open or full closed, I don't see the problem being in that area. Of course, there are still many other possibilities such as cracked housing, worn out leaky valves, etc. [Reply]   [No Email]