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Float Position

F

foxhoun

Member
Does anyone know of any problems with running hydraulics in float position on a John Deere 4230 tractor.One of the remotes will slowly lift the equipment if not in float position.
 
There are four valves inside each SCV on a JD 4230. There is a pressure and return in each direction on each SCV. Yours has a internal leak from the high pressure side to the low when it is in the float position. Also on JD system when the SCV is in float the ports still have transmission pump pressure on them. That is 135-170 psi. I see guys just push the control to float to unhook the hoses. There is still enough pressure to make them harder to unhook.

Your valve could just need the valve re-adjusted but it is more likely that they need rebuilt. Which could just be a oring seal kit or all four valves could be bad. IF it is just a replace the orings and re-adjust then it is not too high a repair. IF you need the valves they are around a $100 each. So if you need all three plus the overhaul seal kit you are in the $400-500 range just for parts.
 
You have a high pressure leak around one of the pressure poppets in the SCV. The SCV needs to be rebuilt. I doubt an adjustment would help it if its applying pressure to one port like it is because it probably has a scored valve or valve seat. You can rebuild the SCV yourself, but the adjustment procedure can be somewhat confusing, so make sure to have the books before you tear it down.
 
Thanks for the info.I just wasn't sure if I could cause any other problems by running then thing in the float position until I could get the thing rebuilt.
 
My 2440 did the same thing. It was a problem when hooked on planter as the marker would be up out of ground by time I got to other end. I would work around the problem by shoving that lever to float. Pulled that planter many years like that. Never hurt anything else and never got any worse.
 

foxhoun
As it's been stated it's fine to put SCV lever in float position until you get valves replaced(parts keys #16)
7581.jpg
 
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