Bearing Races Question and Wheel Bearing Pack Question

Dearest RAMVA,

New outer wheel bearing for my disc brakes (ghia...stock) cuz the old
one had a cople of rollers with a couple of chunks missing (yipes!).
Whats the best way to take the old race out and put the new one in? I
tried tapping it out on the little tap notches in the rotor, but no luck
there. Is this a job for a machine shop?

When packing wheel bearings, is one supposed to fill the inside of the
rotor with grease? I didn't seem to get that out of the haynes (more
just a liberal glob on the inside (relative to the rotor as opposed to
the car) of each bearing) but had read in a couple of places to
basically fill the cavity in the rotor with grease, not to mention that
situation was the case when I pulled the rotor off.

This is more of a lesson learned from getting my rotors turned, you get
what you pay for. An extra three dollars a rotor goes a long way if you
find the right machine shop. Also, you get WHERE you pay for.
Re-manned calipers at Autozone and Kragen were both going to be ten (or
maybe twenty, Nancy couldn't remember how much her calipers were off the
top of her head) dollars more than at BRAND NEW calipers the OVW, and
they had a core charge ON TOP of that. The TRW (brazilian) calipers at
the OVW were outright! Napa had a good deal (outright again, a little
more than at the OVW, but still cheaper than the Fake-LAPS's) on
American made calipers too, but the part had just been discontinued...

Nuff of me rambling, time for you guys to do some.
Thanks so much!


Regards,
Kevin

On Thu, 09 Jun 2005 01:05:28 -0700 Kevin Holzer >
wrote:

>New outer wheel bearing for my disc brakes (ghia...stock) cuz the old
>one had a cople of rollers with a couple of chunks missing (yipes!).
>Whats the best way to take the old race out and put the new one in? I
>tried tapping it out on the little tap notches in the rotor, but no luck
>there. Is this a job for a machine shop?

A machine shop can do it, or you can get a bigger hammer and punch.

>When packing wheel bearings, is one supposed to fill the inside of the
>rotor with grease?

You can fill it up as long as you leave some space in there so that as
the bearing turns it can push any excess out of the way of the
rollers. As long as there is room for the rollers to clear a path for
themselves, you'll be fine.

>Re-manned calipers at Autozone and Kragen were both going to be ten (or
>maybe twenty, Nancy couldn't remember how much her calipers were off the
>top of her head) dollars more than at BRAND NEW calipers the OVW, and
>they had a core charge ON TOP of that. The TRW (brazilian) calipers at
>the OVW were outright! Napa had a good deal (outright again, a little
>more than at the OVW, but still cheaper than the Fake-LAPS's) on
>American made calipers too, but the part had just been discontinued...

Unless you run into someone who has old stock, they're probably all
selling the same calipers.

-
-----------------------------------------------
Jim Adney
Madison, WI 53711 USA
-----------------------------------------------

Jim Adney wrote:
> A machine shop can do it, or you can get a bigger hammer and punch.

My newfound local machine shop is reasonable, so I'll have them do it.
I hit that thing so many times thinking it was going to move little bits
at a time and the movements would become more noticable...not the case
fifteen or twenty minutes into it -- seemingly no movement.
Would a puller work? I remember a picture of a puller I've seen (in my
autoshop textbook from highscool, or maybe from conetmpaltion of my
navel) with three stationary arms and two adjustable arms to reach
inside and yank. Does such thing exist?

> You can fill it up as long as you leave some space in there so that as
> the bearing turns it can push any excess out of the way of the
> rollers. As long as there is room for the rollers to clear a path for
> themselves, you'll be fine.

I shoved a lot but left a lot of room open. Bout an inch or so around
the insides of each wheel bearing, and a bit on the outsides of each as
well. I'll redo it if an inch is unsatisfactory, so please tell me if
it is. Plus, I'm doing the RF this weekend, after I get the old race
out/new race into the rotor.

Thanks very much for the advice!
-Kevin

On Fri, 10 Jun 2005 02:35:01 -0700 Kevin Holzer >
wrote:

>Jim Adney wrote:

>> You can fill it up as long as you leave some space in there so that as
>> the bearing turns it can push any excess out of the way of the
>> rollers. As long as there is room for the rollers to clear a path for
>> themselves, you'll be fine.
>
>I shoved a lot but left a lot of room open. Bout an inch or so around
>the insides of each wheel bearing, and a bit on the outsides of each as
>well. I'll redo it if an inch is unsatisfactory, so please tell me if
>it is. Plus, I'm doing the RF this weekend, after I get the old race
>out/new race into the rotor.

That sounds like plenty of room. You just need to leave enough empty
volume that the rollers can push all the grease that is in their path
out of the way. This is called channeling and is essential for normal
bearing operation.

-
-----------------------------------------------
Jim Adney
Madison, WI 53711 USA
-----------------------------------------------