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From: randy snarr <randylsnarr@yahoo.com>
Subject: Re: [LML] Emergency Gear Dump Valve Change?
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Jim,
  The straght ball valve was not designed to handle the pressure of the systems in our airplanes. Swagelock valves will handle the pressure. As for the return line, I have heard no talk of this on the 235,320/360 airplanes until now. I was planning to do this due to some issues I have had with my system building pressure in the hot sun. When I went to leave OSH both gear gauges read 1050 lbs.  If I had taken off in that condition, the gear would not have come up as the gear up swich would open due to the pressure being over it's limits. Tthis has happend to me before when I was in Vegas. If I had a return line to the resevoir I could open the dump valve and 0 the pressure. I went under the airplane with a 9/16 wrench and cracked one of the high pressure fittings and released the pressure. This is a pain and I intend to add a 3 way valve and return line as soon as practicle. 
  Hope that helps.
   
  Randy L. Snarr
  235/320 
Salt Lake City, Utah

Jim Auman <jimauman@comcast.net> wrote:
                Folks, I am wondering when the Gear Dump Valve was changed and why from the straight ball valve to the Swagelock with a return line to the reservoir.
   
  The Legacy hydraulic diagram shows the return line to the Oildyne reservoir.  Our older 320 series do not show anything but a Hi/Lo line system.
   
  I’m just looking for a reason or what condition created a need for the return line.
   
  If anyone has a sketch or diagram of the new Swagelock port valve I will appreciate it.
   
  Does the Swagelock valve port both the Hi side and the Low side to the return at the same time?
   
  My 320 is working fine with the straight dump setup.  I am trying to understand the Legacy reasons for the Swagelock.
   
  Jim Auman



       
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<div>Jim,</div>  <div>The straght ball valve was not designed to handle the pressure of the systems in our airplanes. Swagelock valves will handle the pressure. As for the return line, I have heard no talk of this on the 235,320/360 airplanes until now. I was planning to do this due to some issues I have had with my system building pressure in the hot sun. When I went to leave OSH both gear gauges read 1050 lbs. &nbsp;If I had taken off in that condition, the gear would not have come up as the gear up swich would open due to the pressure being over it's limits. Tthis has happend to me before when I was in Vegas. If I had a return line to the resevoir I could open the dump valve and 0 the pressure. I went under the airplane with a 9/16 wrench and cracked one of the high pressure fittings and released the pressure. This is a pain and I intend to add a 3 way valve and return line as soon as practicle. </div>  <div>Hope that helps.</div>  <div>&nbsp;</div>  <div>Randy L.
 Snarr</div>  <div>235/320 <BR>Salt Lake City, Utah<BR><BR><B><I>Jim Auman &lt;jimauman@comcast.net&gt;</I></B> wrote:</div>  <BLOCKQUOTE class=replbq style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">  <META content="Microsoft Word 11 (filtered medium)" name=Generator>  <STYLE>  <!--   /* Style Definitions */   p.MsoNormal, li.MsoNormal, div.MsoNormal   {margin:0in;   margin-bottom:.0001pt;   font-size:12.0pt;   font-family:"Times New Roman";}  a:link, span.MsoHyperlink   {color:blue;   text-decoration:underline;}  a:visited, span.MsoHyperlinkFollowed   {color:purple;   text-decoration:underline;}  span.EmailStyle17   {mso-style-type:personal-compose;   font-family:Arial;   color:windowtext;}  @page Section1   {size:8.5in 11.0in;   margin:1.0in 1.25in 1.0in 1.25in;}  div.Section1   {page:Section1;}  -->  </STYLE>    <DIV class=Section1>  <div class=MsoNormal><FONT face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Folks, I am
 wondering when the Gear Dump Valve was changed and why from the straight ball valve to the Swagelock with a return line to the reservoir.<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></SPAN></FONT></div>  <div class=MsoNormal><FONT face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p>&nbsp;</o:p></SPAN></FONT></div>  <div class=MsoNormal><FONT face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">The Legacy hydraulic diagram shows the return line to the Oildyne reservoir.&nbsp; Our older 320 series do not show anything but a Hi/Lo line system.<o:p></o:p></SPAN></FONT></div>  <div class=MsoNormal><FONT face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p>&nbsp;</o:p></SPAN></FONT></div>  <div class=MsoNormal><FONT face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">I’m just looking for a reason or what condition created a need for the return
 line.<o:p></o:p></SPAN></FONT></div>  <div class=MsoNormal><FONT face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p>&nbsp;</o:p></SPAN></FONT></div>  <div class=MsoNormal><FONT face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">If anyone has a sketch or diagram of the new Swagelock port valve I will appreciate it.<o:p></o:p></SPAN></FONT></div>  <div class=MsoNormal><FONT face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p>&nbsp;</o:p></SPAN></FONT></div>  <div class=MsoNormal><FONT face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Does the Swagelock valve port both the Hi side and the Low side to the return at the same time?<o:p></o:p></SPAN></FONT></div>  <div class=MsoNormal><FONT face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p>&nbsp;</o:p></SPAN></FONT></div>  <div class=MsoNormal><FONT face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">My 320 is
 working fine with the straight dump setup.&nbsp; I am trying to understand the Legacy reasons for the Swagelock.<o:p></o:p></SPAN></FONT></div>  <div class=MsoNormal><FONT face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p>&nbsp;</o:p></SPAN></FONT></div>  <div class=MsoNormal><FONT face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Jim Auman<o:p></o:p></SPAN></FONT></div></DIV></BLOCKQUOTE><BR><p>&#32;
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