X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Fri, 19 Oct 2012 08:28:57 -0400 Message-ID: X-Original-Return-Path: Received: from oproxy6-pub.bluehost.com ([67.222.54.6] verified) by logan.com (CommuniGate Pro SMTP 6.0c2) with SMTP id 5832036 for lml@lancaironline.net; Thu, 18 Oct 2012 18:22:37 -0400 Received-SPF: neutral receiver=logan.com; client-ip=67.222.54.6; envelope-from=danny@n107sd.com Received: (qmail 19059 invoked by uid 0); 18 Oct 2012 22:21:59 -0000 Received: from unknown (HELO host295.hostmonster.com) (66.147.240.95) by cpoproxy3.bluehost.com with SMTP; 18 Oct 2012 22:21:59 -0000 Received: from [71.178.196.38] (port=2334 helo=DannyLaptop) by host295.hostmonster.com with esmtpa (Exim 4.76) (envelope-from ) id 1TOyTU-0003ye-TM for lml@lancaironline.net; Thu, 18 Oct 2012 16:21:59 -0600 From: "Danny" X-Original-To: "'Lancair Mailing List'" References: In-Reply-To: Subject: RE: [LML] Re: Hydraulic cylinder main gear Lancair 320 X-Original-Date: Thu, 18 Oct 2012 18:21:53 -0400 X-Original-Message-ID: <009301cdad7e$fbc86030$f3592090$@com> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0094_01CDAD5D.74B6C030" X-Mailer: Microsoft Office Outlook 12.0 Thread-Index: Ac2tT2wGFvL+eIAATK+529opaoLUXAAK5+wQ Content-Language: en-us X-Identified-User: {3234:host295.hostmonster.com:wunderwe:n107sd.com} {sentby:smtp auth 71.178.196.38 authed with danny@n107sd.com} This is a multi-part message in MIME format. ------=_NextPart_000_0094_01CDAD5D.74B6C030 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Ian, I=92m not familiar with the term =93circlip=94 but I assume you=92re = talking about the snap rings, right? =20 I strongly recommend reading the information on Chris Zavatson=92s site (http://www.n91cz.com/) regarding the LNC2 hydraulic system. He = provides valuable insight into the system and its pitfalls. He also has several videos at http://www.n91cz.com/Hydraulics/Lancair_Hydraulics.htm that = have proven very beneficial to me and others when this system presents = issues. I learned a great deal from him supplemented by my own research, tearing = into the system, rebuilding my pump and all of my cylinders. =20 It certainly sounds like you=92ve isolated the troublesome cylinder. = When you took it apart did you see any noticeably damaged O-rings? A damaged = O-ring would indicate a possible burr or roughness that should be resolved. =20 Are you getting adequate pressure? You should have no less than about = 500 psi on the low side and about 1200 psi on the high side. Even so, you should adjust it to about 700/1500 psi respectively. =20 I don=92t know of a shop in my area (Washington, DC) but I haven=92t = looked for one either. But I=92m sure any decent shop should be able to rebuild = and test it. Just don=92t tell them it=92s for an airplane. I believe these = cylinders were originally designed for raising and lowering outboard boat engines = so check with a boat shop in your area. =20 I have two spares in my inventory if you=92d like to have one but = they=92re untested. I=92d recommend replacing all of the O-rings before = installing either one of them just to save time. Lancair has them new at $275 USD = the last time I checked. I=92ll let you have one for $100 USD but I want = your old one in exchange. =20 Good luck and let me know if you want one of my spares. =20 Danny LNC2-360 N 38=B0 43' 25.7" W 77=B0 30' 38.6" Nothing is foolproof to a sufficiently talented fool. =20 From: Ian Crowe [mailto:ian.crowe@sympatico.ca]=20 Sent: Thursday, October 18, 2012 12:41 PM To: lml@lancaironline.net Subject: [LML] Re: Hydraulic cylinder main gear Lancair 320 =20 Hi Danny; =20 No I did not hone and deburr the cylinders. I have no tool to easily do that and indeed saw no need unless in the way of the circlip grooves. =20 Would the pump experience a leak across the shuttle valve if it was = going to leak and how would you test for that? =20 Once we blanked off the offending cylinder by a process of elimination = the pressure loss stopped. I have gauges on the HP and LP sides to help me. =20 I too thought the repair was easy and have done more than few in my time = but this one is a little perplexing! =20 Do you know of a good hydraulic shop near you who would repair and test = the cylinder? =20 Regards =20 Ian ----- Original Message -----=20 From: Danny =20 To: lml@lancaironline.net=20 Sent: Tuesday, October 09, 2012 8:06 AM Subject: [LML] Re: Hydraulic cylinder main gear Lancair 320 =20 I=92m not. I=92m just saying they=92re easy to repair. When you = replaced the seals did you hone & deburr the cylinder? Have you checked the pump for = an internal leak? =20 Danny LNC2-360, 650 hours N 38=B0 43' 25.7" W 77=B0 30' 38.6" =20 From: Ian Crowe [mailto:ian.crowe@sympatico.ca]=20 Sent: Monday, October 08, 2012 1:44 PM To: lml@lancaironline.net Subject: [LML] Re: Hydraulic cylinder main gear Lancair 320 =20 Hi Danny: =20 Didn't know you were in the cylinder repair business!! It is the = actuating cylinder that is giving the problem. I have rebuilt it twice and it = lasts for a while and then starts to leak again across the piston. No sign of = any other leaks anywhere and we have blanked off all the other cylinders and = the pump still cycles. So it must be the cylinder. =20 =20 I have actually sold the plane to my flying buddy who did all the = initial flight testing for me but am helping him with the maintenance now and = again =20 Regards =20 Ian =20 =20 ----- Original Message -----=20 From: Danny =20 To: lml@lancaironline.net=20 Sent: Sunday, October 07, 2012 6:15 PM Subject: [LML] Re: Hydraulic cylinder main gear Lancair 320 =20 Ian, Are you looking for an actuating (gear up & down) cylinder or an oleo suspension (Ong debonger type) cylinder? I have actuating cylinders = that can be rebuilt and I=92ll even do it for you. I have no oleo struts but = if yours need to be rebuilt I=92m sure it can=92t be difficult. =20 Danny LNC2-360, 650 hours N 38=B0 43' 25.7" W 77=B0 30' 38.6" =20 From: Ian Crowe [mailto:ian.crowe@sympatico.ca]=20 Sent: Sunday, October 07, 2012 12:34 PM To: lml@lancaironline.net Subject: [LML] Hydraulic cylinder main gear Lancair 320 =20 Does any one have a spare main gear cylinder for sale? =20 Does anyone know where they can be repaired successfully or failing that where new ones can be bought? =20 Ian Crowe =20 C-FKRO ------=_NextPart_000_0094_01CDAD5D.74B6C030 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Ian,

I’m not familiar with the term = “circlip” but I assume you’re talking about the snap = rings, right?

 

I strongly recommend reading the = information on Chris Zavatson’s site (http://www.n91cz.com/) regarding the = LNC2 hydraulic system.=A0 He = provides valuable insight into the system and its pitfalls.=A0 He also has several videos at http://ww= w.n91cz.com/Hydraulics/Lancair_Hydraulics.htm that have proven very = beneficial to me and others when this system presents issues.=A0 I learned a great deal from him = supplemented by my own research, tearing into the system, rebuilding my = pump and all of my cylinders.

 

It certainly sounds like you’ve = isolated the troublesome cylinder.=A0 = When you took it apart did you see any noticeably damaged = O-rings?=A0 A damaged O-ring = would indicate a possible burr or roughness that should be = resolved.

 

Are you getting adequate pressure?=A0 You should have no less than about = 500 psi on the low side and about 1200 psi on the high side.=A0 Even so, you should adjust it to = about 700/1500 psi respectively.

 

I don’t know of a shop in my area = (Washington, DC) but I haven’t looked for one either.=A0 But I’m sure any decent shop = should be able to rebuild and test it.=A0 Just don’t tell them = it’s for an airplane.=A0 I = believe these cylinders were originally designed for raising and = lowering outboard boat engines so check with a boat shop in your = area.

 

I have two spares in my inventory if = you’d like to have one but they’re untested.=A0 I’d recommend replacing all = of the O-rings before installing either one of them just to save = time.=A0 Lancair has them new at = $275 USD the last time I checked.=A0 = I’ll let you have one for $100 USD but I want your old one = in exchange.

 

Good luck and let me know if you want = one of my spares.

 

Danny

=

LNC2-360<= /p>

N 38=B0 43' = 25.7"

W 77=B0 30' = 38.6"

Nothing is foolproof to a = sufficiently talented fool.

 

From: Ian Crowe [mailto:ian.crowe@sympatico.ca] =
Sent: Thursday, = October 18, 2012 12:41 PM
To: = lml@lancaironline.net
Subject: [LML] Re: Hydraulic = cylinder main gear Lancair = 320

 

Hi = Danny;

 

No = I did not hone and deburr the cylinders.  I have no tool to easily = do that and indeed saw no need unless in the way of the circlip = grooves.

 

Would the pump experience a leak across the shuttle valve if it = was going to leak and how would you test for that?

 

Once we blanked off the offending cylinder by a process of = elimination the pressure loss stopped.  I have gauges on the HP and = LP sides to help me.

 

I = too thought the repair was easy and have done more than few in my = time but this one is a little perplexing!

 

Do = you know of a good hydraulic shop near you who would repair and test the = cylinder?

 

Regards

 

Ian

----- Original Message ----- =

From: Danny =

Sent: Tuesday, October 09, 2012 8:06 = AM

Subject: [LML] Re: Hydraulic cylinder main gear = Lancair 320

 

I̵= 7;m not.=A0 I’m just = saying they’re easy to repair.=A0 = When you replaced the seals did you hone & deburr the = cylinder?=A0 Have you checked = the pump for an internal leak?

&= nbsp;

Danny

=

LNC2-360, 650 = hours

N 38=B0 43' = 25.7"

W 77=B0 30' = 38.6"

&= nbsp;

From: Ian Crowe [mailto:ian.crowe@sympatico.ca<= span class=3DGramE>]
Sent: Monday, October 08, 2012 1:44 = PM
To: lml@lancaironline.net
Subject: [LML] Re: Hydraulic = cylinder main gear Lancair = 320

 

Hi = Danny:

 

Didn't know you were in the cylinder repair business!!  It = is the actuating cylinder that is giving the problem.  I have = rebuilt it twice and it lasts for a while and then starts to leak again = across the piston.  No sign of any other leaks anywhere and we have = blanked off all the other cylinders and the pump still cycles.  So = it must be the cylinder. 

 

I = have actually sold the plane to my flying buddy who did all the initial = flight testing for me but am helping him with the maintenance now and = again

 

Regards

 

Ian

 

 

----- Original Message ----- =

From: Danny =

Sent: Sunday, October 07, 2012 6:15 = PM

Subject: [LML] Re: Hydraulic cylinder main gear = Lancair 320

 

Ian,

Are = you looking for an actuating (gear up & down) cylinder or an oleo = suspension (Ong debonger type) cylinder?=A0 I have actuating cylinders that = can be rebuilt and I’ll even do it for you.=A0 I have no oleo struts but if yours = need to be rebuilt I’m sure it can’t be = difficult.

&= nbsp;

Danny

=

LNC2-360, 650 = hours

N 38=B0 43' = 25.7"

W 77=B0 30' = 38.6"

&= nbsp;

From: Ian Crowe [mailto:ian.crowe@sympatico.ca]=
Sent: Sunday, = October 07, 2012 12:34 PM
To: lml@lancaironline.net
Subject: [LML] Hydraulic = cylinder main gear Lancair = 320

 

Does any one have a spare main gear cylinder for = sale?

 

Does anyone know where they can be repaired successfully or = failing that where new ones can be bought?

 

Ian = Crowe

 

C-FKRO

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