SN95 Hub Disassembly

This hub isn't supposed to be serviceable.  It's a use it up and throw it
away part.

The SN95 hub consists of 6 main parts:

   The hub itself
   The inner bearing assembly
      (12 ball bearings and a nylon cage)
   The outer bearing assembly
      (again, 12 ball bearings and a nylon cage)
   The inner bearing's inner race
   The outer bearing's inner race
   The (infamous) inner grease seal

The main hub contains the outer races for the inner and outer bearings.
The bearings are more-or-less held in the outer race channels by the nylon
cages.  The inner races are inserted from the outside of the hub and beet
in the center.  There, there are held together by an ingenious circular
spring-steel clip.  I've never seen one of these little doo-hickys before,
and I have no idea where to get a replacement, so don't loose or break it!

To disassemble the hub, first remove the clip connecting the two inner
races.  A set of machinist's picks are a big help here.

Once the clip is removed, the two races will easily separate.  Once
removed, the bearings themselves are exposed.

You can stop at this point and clean out the old grease and pack in new
grease using a grease gun and a needle tip.  However, it's hard to get ALL
the old grease in there, and since one of my hub's grease felt a bit
gritty, I decided to press onward...

By far, the biggest hurdle to get over, and the most likely spot to ruin
the hub is at the inner grease seal.  This is a large seal that is pressed
onto the hub.  the inner bearing's inner race has a flange in the end that
presses against the lip of the seal.  You must remove this race to get to
the seal.

Getting the seal out is tough.  About the only to do it without damaging
the bearings underneath is to carefully pry it out, a little bit at a time,
with a large screwdriver.  Be VERY careful doing this.  If you damage the
seal, the hub it toast.  There's no replacement seals available!

Once the seal is removed, the inner bearing can be pulled out.  the outer
bearing is a bit more difficult to remove.  using your machinist's picks,
several of the bearings can be popped out of the cage and then the cage can
be pulled out carefully.

Wash everything, grease it down, and assembly is, as they say, the reverse
of disassembly.  Pack the bearings with a good high-temp grease (I use
Mobil 1) and reinstall the inner races.

And if you DO screw up, PPI has hubs without ABS exciters cheap (and it
looks like the ABS sensors on the old hub can be pressed onto the new one.)
In fact, I plan on running THESE hubs, and use my existing re-paced hubs
as spares.