Steve,
As I understand it, the purpose of the bearing spacer is to
capture/squeeze the outer race of the bearing between the hub's shoulder
and the spacer/axle; to prevent the outer race from spinning in the bore.
Have you rechecked the height of the spacer after putting everything
together or after some driving time? Just wondering if the bearing
might shift inward reducing the height.
I guess that the spacer is also the first "seal" to prevent the rear
axle's gear oil from reaching the brake shoes.
Cheers,
Bob Haskell
AHCA 3000 MkI registrar
http://www.ciahc.org/registry_3000mk1.php
On 07/25/2016 10:27 AM, BJ8Healeys wrote:
> When I installed my rear bearings, I achieved the required 0.001 to 0.004
> dimension by placing three or four 0.003 wheel bearing shims equally spaced
> around the perimeter of the bearing hole in the hub with the new gasket
> installed, then placed the spacer on top of the bearing and tapped the
> spacer/bearing to seat it using a bar across the spacer. The bar was
> positioned to be stopped by the wheel bearing spacers, at which point the
> bearing spacer was installed to the required height above the gasket.
>
> Steve Byers
> HBJ8L/36666
> BJ8 Registry
> AHCA Delegate at Large
> Havelock, NC
>
>
>
> -----Original Message-----
> From: Healeys [mailto:healeys-bounces@autox.team.net] On Behalf Of Bob
> Haskell
> Sent: Sunday, July 24, 2016 3:20 PM
> To: healeys@autox.team.net
> Subject: [Healeys] rear hub
>
> All,
>
> I am replacing the oil seal in one of the rear axle hubs in our '62
> tri-carb. The workshop manual states that the bearing spacer (ATC7569)
> should sit proud of the hub and hub gasket 1 to 4 thousandths of an inch.
> After installing a new seal and re-installing the R&M bearing, the spacer is
> flush with the hub. The old gasket is 9 thousandths thick; the new one is
> 12 thou. So, it looks like I need to make a thicker spacer. Was a bit
> surprised to see that spacers with different thicknesses weren't listed in
> the parts list. Am I missing something?
>
> The O-ring I got from Moss has to be stretched to fit in the slot.
> Unless stretching the O-ring gives a necessary reduction in the thickness,
> I'm going to fit a larger O-ring. A 91 mm ID with 4 mm thickness fits well.
>
> Cheers,
>
> Bob Haskell
> AHCA 3000 MkI registrar
> http://www.ciahc.org/registry_3000mk1.php
>
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