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From: CHRISTOPHER_ZAVATSON@udlp.com
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Date: Mon, 23 Jul 2001 08:16:01 -0500
Message-ID: <00769498.C21254@udlp.com>
Subject: Hydraulics and Epoxy
To: Lancair.list@olsusa.com
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          <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>>
          <<  Lancair Builders' Mail List  >>
          <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> 
>>
 <<After listening to all these hydraulics issues I was wondering if it would
be advisable
 to set up a bench check of all the components of my Legacy before I stuff
 then into marginally accessible locations
<SNIP>
David
I use just such a set-up to pressure test cylinders after overhaul.  It is
electrically identical to the system in the airplane.  On the hydraulic side, it
is typically only driving one cylinder at a time.  There are extra ball valves
to isolate the tested item as well as pressure gauges to monitor high and low
sides.  This rig has been very helpful in finding leaking cylinders (even when
brand new), a leaking dump valve and even an internal pump leak.  When compared
to the system in the airplane, the biggest difference is that five feet of
aluminum tubing, three feet of hose and one cylinder do not have the same
compliance as six cylinders and who knows how many feet of plumbing.  Dynamic
effects are therefore a little different. 
Chris Zavatson
N91CZ  360std 

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Please send your photos and drawings to marvkaye@olsusa.com.
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