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Date: Wed, 23 May 2012 08:17:25 -0400
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From: Robert R Pastusek <rpastusek@htii.com>
Subject: RE: [LML] Sealant for hydraulic lines (LNC2)
Thread-Topic: [LML] Sealant for hydraulic lines (LNC2)
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Rob wrote:

I'm starting to install hydraulic cylinders, but still pretty far off from =
permanently connecting or running anything hydraulic.

The manual recommends Recoseal (tm) and I have no idea what that is.  What =
sealer are people recommending now for the AN hydraulic fittings?  Anything=
 I can get from say Aircraft Spruce or the like?

Rob,
I'd recommend a good grade of thread sealant for all the "pipe thread" fitt=
ings, and especially any that are attaching aluminum to aluminum. Aircraft =
Spruce sells a Permatex brand that I've used successfully:
http://www.aircraftspruce.com/catalog/cspages/permtacksealgsk.php=20

You definitely don't want to use this on AN flared/compression fittings. Th=
ey are made to work "dry;" that is, without lubricant, but I've found that =
a very small dab of EZ Turn lubricant on the threads of the fitting will ma=
ke it easy to remove/reinstall multiple times without damage: ACS part numb=
er 09-00306 EZ TURN (FUELLUBE) 5 OZ TUBE. The 5 oz tube is a lifetime suppl=
y.

Last recommendation: Be careful not to over-torque your flared fittings--or=
 any for that matter, and don't tighten them to "installed torque" until yo=
u're ready for final assembly. Snug will do while assembling/working on the=
 system. If you leave them only finger tight, you'll quickly see if you fai=
led to torque them during final assembly when you apply pressure.

Good Luck; hope this helps!

Bob