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D17 hydraulics

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Dave Freymuth

12-30-2002 16:40:18




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Have a D17 that has the hydraulics rigged for a two way cylinder, but it doesn't seem to be working right. Does anyone know the proper way to plumb it so that there is no back pressure on the control valve. There seems to be pressure that shouldn't be there when you push the lever in one direction.




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Dave F.

01-01-2003 13:18:06




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 Re: D17 hydraulics in reply to Dave Freymuth, 12-30-2002 16:40:18  
No there is no restrictor of any kind in the system. Kevin the pictures would be of geat help. Thanks in advance. The loader that is on the tractor does not want to lower down like it should. There seems to pressure slowing it's rate of decent. The cylinders are only one way cylinders. Thanks for all the replies.



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JMS/MN

12-31-2002 10:53:29




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 Re: D17 hydraulics in reply to Dave Freymuth, 12-30-2002 16:40:18  
Is there a restrictor or one-way valve somewhere in the system? For example, a restrictor to slowly lower a dump wagon, etc.?



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steve

12-30-2002 19:05:13




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 Re: D17 hydraulics in reply to Dave Freymuth, 12-30-2002 16:40:18  
Dave, did it ever work with this valve, or could it be the wrong kind of valve. Basically you have and inlet (from the pump or supply) and a sump line back to the oil resivoir. THe other two lines, normally same size and symetric at some point of the vavle, go to both ends of the cylinder. When you push the valve in, the pressure port goes to one of the cylinder lines and the sump line is connected and drains the other side of the cylinder. When you pull the valve out, the two cylinder lines are switched inside and the opposite line is pressurized and the other is drained back to sump. It sounds like one side of the cylinder is not draining back to sump. You could take the lines off and blow air thru the supply side into the valve and then stroke the valve in and out and see which port is whick. Also could be that spool is broken and will not work internal??

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kevin

12-30-2002 18:44:12




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 Re: D17 hydraulics in reply to Dave Freymuth, 12-30-2002 16:40:18  
Dave,

We recently bought a D17 diesel that has a control valve on the left fender with two hydraulic quick disconnects. I haven't tested the system, but it's hooked up and hoses are there. If you think it would help, I can email some photos.

Kevin



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