Disaster fitting FAG bearings.

[sammyhale30]

Both the FAG bearings went in beautifully with my press so i can only assume the wheel hub/abs ring must be the wrong one for my car..?

Really angry right now because money down the drain.  The first Wheel hub abs ring i tried tapping gently in with a hammer as per the Autodoc videos... it got so far and wouldn`t go any further, so i gave it some firm smacks with the hammer and then the bearing started to come apart, it became loose like it was coming apart.  The second one I tried a more gently approach, slowly easing it in with my press, the hub got so far then the fag bearing bottom just popped off!!!  Am i right in assuming the hub/abs ring must be wrong?? It's almost as if it is slightly too wide for the bearing.  I did notice the bearing has a groove in the middle between both halfs.  The abs ring has no grooves, its just a smooth shaft. 

 

So annoyed now as the FAG bearings are not exactly cheap!  Anyone any ideas as why this could have happened.. just wrong part??  I applied plenty of the proper grease that came with the FAG bearings to all surfaces.  Just seems as if the abs ring/hub splined shaft was too wide.

 

Cheers,

Samuel

Edited 8 November, 2020 by sammyhale30

[sammyhale30]

Ok after watching some more vids on youtube that go into more detail... I didn`t support the bottom of the bearing when pressing the abs ring hub in...so the bearing was pushed apart under the pressure.   :(.  We learn by mistakes i guess.

[J.R.]

In your photograph you the adaptor you are using is pressing the inner out of the bearing.

 

Should you not have been pressing on the hub?

 

Its been several years since I did one but I'm sure that I pressed the ABS ring onto the hub.

[Warrior193]

It is critical that you should only exert any insertion force against the OUTER part of the ball-race when installing - a good tip is to use an old, discarded ball-race of the same size as a mandrel. Hammering- n a bearing on the inner race will almost certainly result in "dimpling" the bearing faces - or destroying the bearing completely.  

[J.R.]

That bearing could easily be reassembled using the press judiciously, after all that is the way that it was put together.

 

You wont be able to "dimple" a through hardened bearing race but you could certainly destroy the bearing or cause its premature failure.

Edited 8 November, 2020 by J.R.