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Re: Lift Arms Creep Up when engine running

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Author  [Modern View]

02-12-2013 11:09:55

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could make a linkage adjustment through side cover. linkage rod that hangs down below cyl. loosen jam nut shorten one turn

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02-12-2013 11:15:17

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 Re: Lift Arms Creep Up when engine running in reply to 714_run, 02-12-2013 11:09:55  
Yeah, I was thinking of going through the side cover and hand pressing the linkages to get a response, before taking off the lift cover and checking valves. I don't have a clear plan so wanted to see what ya'll said b4 I started. Thanks!

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02-12-2013 17:12:18

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 Re: Lift Arms Creep Up when engine running in reply to lwtm, 02-12-2013 11:15:17  
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.

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