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Message: <blockquote data-quote="Mike10" data-source="post: 44036" data-attributes="member: 5461">Some leak down is normal for this control valve, but to isolate the problem you can;One way to tell if the cylinder packing is the problem is to slowly feather the bucket pedal to curl the bucket back.  If the bucket drifts down significantly instead of curling back than the packing is probably the problem.You can also lower the bucket to the ground and find JIC plusgs thatt fit the bucket control lines at the control valve.  Remove the lines from the control valve and plug the lines and the valve.  Raise the boom.  If the bucket drifts down then the problem is in the cylinders, if not the control valve is the problem.If you determine the control valve is the problem it could be just the normal leakage that the valve has.  You can remove the circuit relief vavle, this is the plug or valve sticking out the back in line with the bucket lines.  Sometimes the orings go bad.  You could also have a bad load check valve.  This valve is between the two lines for the bucket and usually has a screw driver slot.</blockquote>