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<HTML><FONT FACE=arial,helvetica><FONT SIZE=2>Just a year ago, I had my hydraulic pump overhauled, replaced the high and <BR>low pressure switches and replaced the O-rings in the left and right gear <BR>actuators. Until about ten days ago it has functioned flawlessly, recharging <BR>on the down side after sitting for several days with a one-second chirp of <BR>the hydraulic pump when the master switch is turned on.
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<BR>Now, pressure will not hold on the down side. At first occasional and then <BR>persistent chirping of the hydraulic pump every +/- 15 seconds is the case.
<BR>Pressure holds just fine on the up side. There are no apparent external <BR>leaks in the system and the level of fluid in the hydraulic pump reservoir is <BR>unchanged.
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<BR>At first, I thought fluid might be bypassing the piston O-ring in the nose <BR>gear actuator. For reasons too tedious to explain, I was unable to remove it <BR>for servicing last year when I replaced the O-rings in the others. I'm at <BR>loss to understand why fluid would bypass an O-ring in the down position but <BR>not in the up position, particularly when the up side pressure is so much <BR>higher.
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<BR>Any thoughts?
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<BR>Thanks,
<BR>
<BR>Byron Fox
<BR>LNC2
<BR>N3144C
<BR>Mill Valley, CA</FONT></HTML>
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