It has been a practice of mine for ten years to, after shutdown and before
securing (off) the master switch, to open the hydraulic dump valve, let the
motor run for a couple seconds then master switch off.  This relieves
pressure on everything.  Before startup, I turn the master on and the pump
runs for a second or two as I close the dump valve.

For what it is worth.  It has just seemed to me that this practice would
help the service life of switches, valves connections etc.  I haven't had
problems except for relacing the old (1989) pump and re-flaring a couple of
lines.  Any validity to this practice?

George Shattuck


----- Original Message -----
From: <PJHWFD@aol.com>
To: "Lancair Mailing List" <lml@lancaironline.net>
Sent: Friday, December 31, 2004 8:58 AM
Subject: [LML] Re: 320/360 gear extension failure - a theory


> In a message dated 12/30/2004 2:28:44 PM Eastern Standard Time,
> Rob.Logan@Philips.com writes:
> Twice I've selected gear *up* and nothing happened.
> Rob
>
>  Twice I've selected gear up and nothing happened. I recycled the gear and
> out went the green.  Only in the cold, why?  I've been thinking would it
be wise
> to open the dump valve before start up to release potentially built up
> pressure? I recall you had a door hang open when we were flying. Did you
shut the
> breakers before opening the dump valve and recycling? Happy New Year
>