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Commiseration on all your hydraulics problems.
 I can empathise because I went through a completely different set - but equally
frustrating -set of hydraulics problems! Mainly involving leaking, or bursting,
flared joints.
And hence I would like to ask the group's opinion on whether the type of Al.
tube supplied in the original LNC2 kit is not too soft for this hydraulic
application.
On more than one occasion during "my problems", I have had a flared joint fail
(near explosively) by being essentially "extruded" out of the olive/cap nut
clamping action. So that, when examined afterwards, there was either a
sharp-edged rim, or a broken edge because it had left an annular remnant still
inside the olive/cap nut clamp.
It sounds like what you observed about the end of the flared pipe, when
disassembling the pressure switch, corresponds to a (pre-explosive failure)
stage of this long-term extrusion process.
When I was building, a friend who was building a Glasair noted that the tubing
provided in his kit was much harder to flare without causing cracking of the
flared edge, than my tubing was.
But maybe we are paying the price of easier flaring with a long-term problem of
joint failure by extrusion.
Any opinions?
Colin Jones
(a.k.a. around the hangar as "Mr Hydraulics").
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Please send your photos and drawings to marvkaye@olsusa.com.
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