X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Thu, 11 Jul 2013 09:21:37 -0400 Message-ID: X-Original-Return-Path: Received: from oproxy7-pub.bluehost.com ([67.222.55.9] verified) by logan.com (CommuniGate Pro SMTP 6.0.5) with SMTP id 6367993 for lml@lancaironline.net; Wed, 10 Jul 2013 16:00:19 -0400 Received-SPF: error receiver=logan.com; client-ip=67.222.55.9; envelope-from=danny@n107sd.com Received: (qmail 32271 invoked by uid 0); 10 Jul 2013 19:59:34 -0000 Received: from unknown (HELO host295.hostmonster.com) (66.147.240.95) by oproxy7.bluehost.com with SMTP; 10 Jul 2013 19:59:33 -0000 Received: from [174.227.192.165] (port=5224 helo=[10.236.254.167]) by host295.hostmonster.com with esmtpa (Exim 4.80) (envelope-from ) id 1Ux0Xv-0005oc-JY; Wed, 10 Jul 2013 13:59:28 -0600 References: In-Reply-To: Mime-Version: 1.0 (1.0) Content-Transfer-Encoding: 7bit Content-Type: multipart/alternative; boundary=Apple-Mail-51597BCE-8BCE-44B8-878B-44B2C3B6519A X-Original-Message-Id: <7BE2B784-FC73-48FD-943C-0377F67CB4A6@n107sd.com> X-Original-Cc: "lml@lancaironline.net" X-Mailer: iPhone Mail (10B329) From: Danny Subject: Re: [LML] FW: [LML] Overhauling Landing Gear Actuators X-Original-Date: Wed, 10 Jul 2013 15:59:25 -0400 X-Original-To: Lancair Mailing List X-Identified-User: {3234:host295.hostmonster.com:wunderwe:n107sd.com} {sentby:smtp auth 174.227.192.165 authed with danny@n107sd.com} --Apple-Mail-51597BCE-8BCE-44B8-878B-44B2C3B6519A Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Bad idea. Dry O-rings will crack sooner. Grease the crap outta those thing= s with O-Lube. Sent using my iPhone. Danny On Jul 10, 2013, at 3:36 PM, "Dana Westphal" wrote: > I also had to clean up the snap ring groove with sandpaper as I burred it u= p a bit when removing the ring. I was more careful on the other two. Below= is another tip I received from a fellow Lancair pilot: > =20 > Keep the o-ring and its groove dry and free of oil and grease except for t= he outside of the o-ring that will contact the actuator cylinder. On that s= urface, apply the hydraulic oil or the grease they recommend. This procedur= e is supposed to keep the o-ring from trying to roll out of its groove when s= liding the assembly into the cylinder, but still supplies lubrication for th= e o-ring to cylinder interface. I received this tip after I had already reb= uilt mine, but I do recall my O-rings trying to squirt out of their grooves d= uring installation. Good luck! > =20 > Dana > Dana Westphal > Legacy RG N97DW > =20 > From: marv@lancair.net [mailto:marv@lancair.net]=20 > Sent: Tuesday, July 09, 2013 3:31 PM > To: lml > Subject: Re: [LML] Overhauling Landing Gear Actuators > =20 >=20 >=20 >=20 > Posted for Chris Zavatson : >=20 > > Pete, > > Your groove must have a small burr or similar grabbing the O-ring. I=20= > >suggest some fine wet/dry sandpaper to knock down the edges of the O-ring= =20 > >groove. I use a home-made polishing/honing tool made of wet-dry strips t= hat=20 > >takes care of this when I clean up the inner bore. By hand should work=20= > >also. 400-600 grit if you need to take material off. Down to 1,000 grit= for=20 > >finishing. > > And of course lots of Parker O-Lube helps also, but this will not make u= p=20 > >for a burr. =20 > > see also=20 > >http://n91cz.com/Hydraulics/Rebuilding_Lancair_Hydraulic_Cylinders.pdf > > good luck, > > =20 > > Chris Zavatson > > N91CZ > > 360std > > www.N91CZ.net > >=20 > >From: CavittP > > To: lml@lancaironline.net=20 > > Sent: Tuesday, July 9, 2013 5:15 AM > > Subject: [LML] Overhauling Landing Gear Actuators > >=20 > >=20 > >=20 > > Any hot-tips on how to replace O-rings in landing gear actuators? I'm=20= > >having a hard time not causing damage getting them past the snap ring=20 > >grooves. > >=20 > > Pete Cavitt - N320PL=20 > > +1-619-701-0784 Cell > > http://www.petecavitt.com/ > >=20 > >>> --Apple-Mail-51597BCE-8BCE-44B8-878B-44B2C3B6519A Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable
Bad idea.  Dry O-rings will crack= sooner.  Grease the crap outta those things with O-Lube.

Sent u= sing my iPhone.
Danny

On Jul 10, 2013, at 3:36 PM, "= Dana Westphal" <dana= .westphal@shorelineenergy.net> wrote:

I also had to clean up the snap ring groo= ve with sandpaper as I burred it up a bit when removing the ring.  I wa= s more careful on the other two.  Below is another tip I received from a= fellow Lancair pilot:

 

Keep the o-ring and its groove dry and free of oil and gre= ase except for the outside of the o-ring that will contact the actuator cyli= nder.  On that surface, apply the hydraulic oil or the grease they reco= mmend.  This procedure is supposed to keep the o-ring from trying to ro= ll out of its groove when sliding the assembly into the cylinder, but still s= upplies lubrication for the o-ring to cylinder interface.  I received t= his tip after I had already rebuilt mine, but I do recall my O-rings trying t= o squirt out of their grooves during installation.  Good luck!

 

Dana

Dana Westpha= l

Lega= cy RG N97DW

 

From: marv@lancai= r.net [mailto:marv@lancair.net] <= br>Sent: Tuesday, July 09, 2013 3:31 PM
To: lml
Subje= ct: Re: [LML] Overhauling Landing Gear Actuators

 


=

Posted for Chris Zavatson <chris_zavatson@yahoo.com>:

> Pete,
> Your groov= e must have a small burr or similar grabbing the O-ring.  I
&g= t;suggest some fine wet/dry sandpaper to knock down the edges of the O-ring <= br>>groove.  I use a home-made polishing/honing tool made of wet-dry= strips that
>takes care of this when I clean up the inner bore.=   By hand should work
>also.  400-600 grit if you need to t= ake material off.  Down to 1,000 grit for
>finishing.
> An= d of course lots of Parker O-Lube helps also, but this will not make up
= >for a burr. 
> see also
>http://n91cz.com/Hydr= aulics/Rebuilding_Lancair_Hydraulic_Cylinders.pdf
> good luck,
= >  
> Chris Zavatson
> N91CZ
> 360std
> www.N91CZ.net
>
>From: CavittP= <cavittp@aol.com>
> To: <= a href=3D"mailto:lml@lancaironline.net">lml@lancaironline.net
> S= ent: Tuesday, July 9, 2013 5:15 AM
> Subject: [LML] Overhauling Landin= g Gear Actuators
>
>
>
> Any hot-tips on how to r= eplace O-rings in landing gear actuators?  I'm
>having a hard ti= me not causing damage getting them past the snap ring
>grooves.
&g= t;
> Pete Cavitt - N320PL
> +1-619-701-0784 Cell
> http://www.petecavitt.com/
> >>>

= --Apple-Mail-51597BCE-8BCE-44B8-878B-44B2C3B6519A--