X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 2 [X] Return-Path: Sender: To: lml@lancaironline.net Date: Tue, 17 Apr 2007 02:42:30 -0400 Message-ID: X-Original-Return-Path: Received: from imo-d22.mx.aol.com ([205.188.144.208] verified) by logan.com (CommuniGate Pro SMTP 5.1.8) with ESMTP id 1988810 for lml@lancaironline.net; Mon, 16 Apr 2007 21:59:25 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.188.144.208; envelope-from=Sky2high@aol.com Received: from Sky2high@aol.com by imo-d22.mx.aol.com (mail_out_v38_r8.1.) id q.c7d.bcc4eb9 (40520) for ; Mon, 16 Apr 2007 21:58:21 -0400 (EDT) From: Sky2high@aol.com X-Original-Message-ID: X-Original-Date: Mon, 16 Apr 2007 21:58:21 EDT Subject: Re: 200/300 series bearing problems. (about lml@lancaironline.net list) X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1176775101" X-Mailer: 9.0 Security Edition for Windows sub 5365 X-Spam-Flag: NO -------------------------------1176775101 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 4/16/2007 12:33:40 P.M. Central Daylight Time, marv@lancair.net writes: Re wheel bearings in Matco wheels. The oil seals are bonded to the inner bearing race, and because there is more friction between the wheel and the seal than between the race and the axle the race turns on the axle. We have PN 4798 spacer in stock (.0875 X .049 X 1.365) installing this will provide adequate bearing preload and prevent the races from turning. Ross Connell ---- Lancair Ross, Considering just the 200/300 series Lancairs without Outback Gear: I can't find that part in the Aero Craft online catalog. Furthermore, the dimensions that you listed don't make sense. Your analysis is wrong. The surfaces of the nut protrusions and the spacers are too small where they meet the curved part of the bearing near the axle. A really poor design by Matco back in the old days. The problem with past Matco spacers on the old fashioned 200/300 series axles is that they only put pressure on the curved part of the seal area near the axle. That is, they were about 1/8 inch wide, about 1/8 thick and just fit over the axle. Since they were made of aluminum, they would quickly wear from allowing the bearing to rotate, thus allowing the wheel to loosen with resulting problems. There may be many solutions (among them, Grove wheels), but I finally took two axle washers and flat head riveted them together just outside the step in the axle. The flat side provided enough surface area to press against the rubber bearing seal along with the proper spacing. I also found that another axle washer was absolutely necessary for the nut side as the same problem would occur there. With the washers in place and tightening up the axle nut so that the wheel cannot be spun by hand has eliminated all wearing by stopping the bearing from spinning and eroding both the nut and the "spacer". Scott Krueger AKA Grayhawk Lancair N92EX IO320 SB 89/96 Aurora, IL (KARR) Darwinian culling phrase: Watch This! ************************************** See what's free at http://www.aol.com. -------------------------------1176775101 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

In a message dated 4/16/2007 12:33:40 P.M. Central Daylight Time,=20 marv@lancair.net writes:

<= FONT=20 style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000 size= =3D2>Re wheel=20 bearings in Matco wheels.
The oil seals are bonded to the inner bearing= =20 race, and because there is
more friction between the wheel and the seal= =20 than between the race and
the axle the race turns on the axle.
We ha= ve=20 PN 4798 spacer in stock (.0875 X .049 X 1.365) installing this
will pro= vide=20 adequate bearing preload and prevent the races from
turning.
Ross=20 Connell ---- Lancair

Ross,

Considering just the 200/300 series Lancairs without Outback Gear:

I can't find that part in the Aero Craft online catalog. Furtherm= ore,=20 the dimensions that you listed don't make sense. Your analysis is=20 wrong. The surfaces of the nut protrusions and the spacers a= re=20 too small where they meet the curved part of the bearing near the=20 axle. A really poor design by Matco back in the old days.

The problem with past Matco spacers on the old fashioned 200/300 series= =20 axles is that they only put pressure on the curved part of the seal area nea= r=20 the axle. That is, they were about 1/8 inch wide, about 1/8 thick and=20= just=20 fit over the axle. Since they were made of aluminum, they would quickl= y=20 wear from allowing the bearing to rotate, thus allowing the wheel to loosen=20= with=20 resulting problems. There may be many solutions (among them, Grove=20 wheels), but I finally took two axle washers and flat head riveted them= =20 together just outside the step in the axle. The flat=20 side provided enough surface area to press against the rubber bear= ing=20 seal along with the proper spacing. I also found that another axl= e=20 washer was absolutely necessary for the nut side as the same probl= em=20 would occur there. With the washers in place and tightening up the axl= e=20 nut so that the wheel cannot be spun by hand has eliminated all wearing by=20 stopping the bearing from spinning and eroding both the nut and th= e=20 "spacer". =20

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

Darwinian culling phrase: Watch=20 This!

See wha= t's free at AOL.co= m.

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