Posted for "Gerard O Connell" <goconnell@dodo.com.au>:

 Larry there is an extended piece on LNC2 hydraulics posted July 2001 by Scott
Krueger N92EX.
 
 Ian Crowe also wrote me an extended problem solving guide for hyraulic leaks
etc which I printed out and will search for.
 
 Below is a discussion of the test you spoke about from an old post:
 
 The operation of the system may seem to be almost completely normal
 with the spool valve reversed. Without gauges, the only symptom may
 be a slightly weak retraction at the top of the cycle, and you can
 overcome that problem by raising the high-side pressure switch
 setting. That was the way I had my system set up initially with the
 spool-valve problem. There is one other symptom, but it doesn't
 normally come up under normal operation. The gear won't come down
 immediately after a retraction or during a retraction near the top of
 the cycle (this is because the low-side pressure has increased during
 the retraction and the low-side pressure switch is open as the
 pressure bleeds off). If the spool valve is in correctly, you will be
 able to lower the gear at any point during the up cycle without the
 system hesitating. I say it doesn't come up under normal operation
 because once you raise the gear, you normally don't lower if for a
 while, and the pressure has time to bleed off. Therefore, it is
 possible to have a reversed spool valve and not really have any
 significant symptoms, if you don't have pressure gauges.
 
 If you are seeing pressure in the low side during the retraction
 cycle (increasing a little from the down setting all the way up),
 then I would check the spool valve.
 
 
 Gerard O Connell
 Melbourne, Australia
 VH-LPD (LNC2)