X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml Date: Mon, 10 Jul 2006 22:42:49 -0400 Message-ID: X-Original-Return-Path: Received: from [64.12.137.3] (HELO imo-m22.mail.aol.com) by logan.com (CommuniGate Pro SMTP 5.1c.2) with ESMTP id 1231513 for lml@lancaironline.net; Mon, 10 Jul 2006 18:35:59 -0400 Received-SPF: pass receiver=logan.com; client-ip=64.12.137.3; envelope-from=Sky2high@aol.com Received: from Sky2high@aol.com by imo-m22.mx.aol.com (mail_out_v38_r7.5.) id q.502.2e5ef18 (29673) for ; Mon, 10 Jul 2006 18:35:09 -0400 (EDT) From: Sky2high@aol.com X-Original-Message-ID: <502.2e5ef18.31e4301d@aol.com> X-Original-Date: Mon, 10 Jul 2006 18:35:09 EDT Subject: Re: [LML] Sticky landing gear and brake hydraulics X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1152570909" X-Mailer: 9.0 Security Edition for Windows sub 5318 X-Spam-Flag: NO -------------------------------1152570909 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Content-Language: en =20 In a message dated 7/10/2006 1:23:45 A.M. Central Standard Time, =20 charles.r.patton@ieee.org writes: 1) The plane is on jacks and when I run the free-fall gear test, it=20 stops before the overcenter link finishes. Pulled the bolt on the=20 over-center link and all indications are that the Matco hydraulic=20 cylinder is sticking as everything else swings very free. The kit was=20 started in =E2=80=9891 and started flying in =E2=80=9899. I changed out the= hydraulic=20 fluid last year during the annual (the pump plastic tank was splitting.)=20 and used new bulk fluid, type 41, from Aircraft Spruce. Do the cylinder=20 seals go bad around this time frame on Matcos? If so, can I get just the=20 elastomer parts and rebuild myself or is it a factory job only? 2) In a similar vein, it appears the Matco brake pucks are also=20 sticking. So same question =E2=80=93 do they tend to go bad around this tim= e frame? Charles, =20 I have been flying since 1996 and never had the problems you mention =20 although all of the gear actuators are now Wolstenholme (replacements from =20 AeroCrafters). I have rebuilt some of them with the rebuild kits from Lanc= air. =20 I am still using the milspec H5606A fluid from the gallon I got in about=20 1992. H5606G (type 41) is slightly different. See: =20 _http://store.skymartsales.com/ro756mi6x1ga.html?gclid=3DCNH54eCYiIYCFRkUFQo= dVz- Jng_=20 (http://store.skymartsales.com/ro756mi6x1ga.html?gclid=3DCNH54eCYiIYCFRkUFQo= dVz-Jng)=20 =20 I wonder if the mix of old and new created the problem? OR, if the MATCO =20 seals are rubber based? =20 The rebuild is relative easy (but messy) as long as everything is kept =20 clean, seals are lubricated before sliding everything back and forth and the= =20 trapazoidal shaft seals are correctly re-installed. =20 Good Luck, =20 Scott Krueger AKA Grayhawk Lancair N92EX IO320 SB 89/96 Aurora, IL (KARR) Abnegate Exigencies! -------------------------------1152570909 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Content-Language: en

In a message dated 7/10/2006 1:23:45 A.M. Central Standard Time,=20 charles.r.patton@ieee.org writes:

<= FONT=20 style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000 size= =3D2>1) The=20 plane is on jacks and when I run the free-fall gear test, it
stops bef= ore=20 the overcenter link finishes. Pulled the bolt on the
over-center link=20= and=20 all indications are that the Matco hydraulic
cylinder is sticking as=20 everything else swings very free. The kit was
started in =E2=80=9891 a= nd started=20 flying in =E2=80=9899. I changed out the hydraulic
fluid last year dur= ing the=20 annual (the pump plastic tank was splitting.)
and used new bulk fluid,= =20 type 41, from Aircraft Spruce. Do the cylinder
seals go bad around thi= s=20 time frame on Matcos? If so, can I get just the
elastomer parts and=20 rebuild myself or is it a factory job only?

2) In a similar vein, i= t=20 appears the Matco brake pucks are also
sticking. So same question =E2= =80=93 do=20 they tend to go bad around this time frame?

Charles,

I have been flying since 1996 and never had the problems you mention=20 although all of the gear actuators are now Wolstenholme (replacements from=20 AeroCrafters). I have rebuilt some of them with the rebuild kits from=20 Lancair.

I am still using the milspec H5606A fluid from the gallon I got in= =20 about 1992. H5606G (type 41) is slightly different. See:

http://store.skymartsales.com/ro756mi6x1ga.html?gclid=3DCNH5= 4eCYiIYCFRkUFQodVz-Jng

I wonder if the mix of old and new created the problem? OR, if the MATC= O=20 seals are rubber based?

The rebuild is relative easy (but messy) as long as everything is kept=20 clean, seals are lubricated before sliding everything back and forth and the= =20 trapazoidal shaft seals are correctly re-installed.

Good Luck,=20

Scott Krueger=20 AKA Grayhawk
Lancair N92EX IO320 SB 89/96
Aurora, IL=20 (KARR)

Abnegate Exigencies!

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