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

[cmichaelo@optonline.net]

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

----- Original Message -----
From: David Rosicke <d.rosicke@snet.net>
Date: Saturday, May 28, 2005 9:50 pm
Subject: Re: RE: [Shotimes] Vibration or picky...replaced bearings...screwed...more screwed?

> Double Ugh.
> 
> Every sleeved bearing that I've ever pressed required a drift(or 
> punch) the size of the outer race (or extremely close to it!) so 
> that the pressure is exerted on the OUTSIDE of the bearing, not on 
> the inner race.  If the inner race stuck out a bit, you used a 
> hollow drift or one that had a concave part that didn't touch the 
> inner race.
> 
> I'd ask the machine shop how they did their work and if you could 
> look at their tools.
> 
> My $.03 (Inflation is still at an all-time low)
> 
> Dave R.
> 
> cmichaelo@optonline.net wrote:
> Tom,Leigh,
> 
> It just keeps getting worse.
> 
> I now have the knuckles out and inspected the bearings...and it's 
> the sleeve that is loose in the bearing and the bearing grease is 
> leaking out (on that side that faces the engine.) The sleeve can 
> be wiggled and even moves back and forth by about 1/4mm or so in 
> the axle direction!
> 
> How could this have happened except that the shop that pressed in 
> the bearing+hub screwed up?
> 
> Either they pressed the bearing in by the sleeve, or they pressed 
> the hub in against the bearing. Though, the guy in the shop said 
> that if you pressed in the bearing by the sleeve, or pressed the 
> hub in against the bearing, that the sleeve would pop right out.
> 
> Can you see any other explanation? I mean, if the hub and bearing 
> are slightly out of spec with respect to each other, as you have 
> proposed, could that explain the loose sleeve?
> 
> Michael
> 94MTX,green,BOS+,Koni/Intrax,Baer,Corbeau
> SHO items for sale: http://hometown.aol.com/cmichaelo/for_sale.html