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#1
10-27-2012, 06:15 PM
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hydraulic repair experts check in
My JD loader control unit is leaking.
I had the unit rebuilt several years ago and some of the problems were never really fixed. So when the leaking got real bad I decided to fix it myself. The spools were both leaking to the point of squirting when the valve was moved. I fixed this by building up the spool with silver solder and having it turned to spec again. Now the check valves are leaking. I removed them,replaced the O rings and backing rings,it was leak free for about 30 min and is leaking again. These check valves are a press fit with a thru bolt retaining them. Unit is made by Cessna and is called a closed circuit unit. Any ides why these check valves are now leaking?
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