[Shotimes] Vibration or picky...replaced bearings...screwed...more screwed?

[cmichaelo@optonline.net]

OK. I brought the knuckles back to the shop.  The guy who did the work, and he really seems to know his stuff, took it seriously.  Put the knuckles in a wise and inspected the bearings.  The inner race was visibly moving when pushing/pulling on the hub.  But everything was seated properly though.

He didn't know how this could have happened. He went through how he had pressed in the bearing and the hub:

First, he pressed in the bearing with an "appropriately" sized axle nut so that pressure is only exerted onto the outer portion of the bearing.  So that seems fine to me.  He even showed me the axle nut he had used.

Second, he pressed the hub into the bearing while supporting the inner race with another "appropriately" sized axle nut...sized so that it only touches the "outer" flat part of the inner race.  Does this sound right to you guys?

The only explanation he could come up with is that both bearings were either

1) damaged from factory, or
2) that too much grease was packed into the bearings at factory.

The only other explanation I can now think of is that the male part of the hub was too big for the inner race and that too much pressure was applied to pressing it in, which distorted the sleeve that "wraps" around the inner race.

Otherwise, I'm !@#$%^& tired of this.  My beloved SHO is stuck in my garage during this most drivable time of the year.  It sux!!!


Michael
94MTX,green,BOS+,Koni/Intrax,Baer,Corbeau
SHO items for sale: http://hometown.aol.com/cmichaelo/for_sale.html

----- Original Message -----
From: David Rosicke <d.rosicke@snet.net>
Date: Thursday, June 2, 2005 4:15 pm
Subject: Re: RE: [Shotimes] Vibration or picky...replaced bearings...screwed...more screwed?

> It seems unlikely that two bearings went bad at the same time 
> unless the entire batch was bad.  Ask to see what tools he is 
> going to use and get back to us!
> 
> Dave R.
> 
> cmichaelo@optonline.net wrote:
> Thanks all! 
> 
> This will be good background info for when I take the knuckles 
> back to the shop next week.
> 
> My theory about what happened is this:
> 
> The guy used a flat drift. Since the sleeved part protrudes out 
> about ~1/4mm, the sleeve was consequently depressed the same 
> amount until the drift came in touch with the outer part of the 
> bearing, at which point the damage had already been done to the 
> sleeve.
> I had two bearings replaced. One bearing is totally gone in that I 
> can move the sleeve back and forth in the axle direction by about 
> 1/4mm. The sleeve in the other bearing can't be moved nearly as 
> much, though it still visibly wiggles. What this means, IMO, is 
> that the second bearing just went into the knuckle easier than the 
> first bearing. And the easier the bearing slips into the knuckle, 
> the less damage is done to the sleeved part (inner race) when 
> using a flat punch.
> 
> Just my theory.
> 
> The other theory, aside for what Leigh mentioned about heat 
> damage, is that the bearings were bad from factory. But I just 
> can't imagine that. Can you???
> 
> Michael
> 94MTX,green,BOS+,Koni/Intrax,Baer,Corbeau
> SHO items for sale: http://hometown.aol.com/cmichaelo/for_sale.html