[Vwdiesel] front wheel bearings
vbriggs at stny.rr.com
Thu Apr 12 23:54:12 EDT 2007
LOL been there , done that and didn't like the end result
On Apr 12, 2007, at 3:05 PM, James Hansen wrote:
>> I use a oxyacetylene torch after trying a bearing moon, for
>> extracting the
>> inner race from the hub flange. I've never nicked the flange cutting
>> the inner race off, and I've done it at least a dozen times. Best
> Stuff I Have Learned 101:
> 1. Never use a plasma cutter for this. Ever. Ever. Ever.
>> 3. If you can do it with a vice, great, but I use a 12 ton press, and
>> sometimes need to heat and/or hammer things to get them apart. A vice
>> might work for reassembly, if you ended up having a shop with a press
>> do the disassembly.
> It's easy to spit the drive flange out with a press.
> If the outer bearing halves are ignorant and won't come out of the hub,
> lay a weld bead on them on the inside surface. When it cools, they
> I have had one that was to the point of crushing the hub (30T press)
> Sometimes you can't just press stuff, you have to clever it a bit. Next
> one falls out...
>> 4. Consider chilling the bearing before pressing it into the hub.
> Heat the hub. I hate chilling bearings- chills the inside, sucks in
> air, you get moisture inside with the grease. Academic I know, but
> don't like it if only in theory.
> You could
>> chill the flange also,
> If you have liquid nitrogen that is the super slickness. Used it a few
> times, man, parts just fall together. Good for warts too. :-)
> and let the bearing warm up, once pressed into the
>> hub, before pressing the flange into the inner race. Heed Loren's
>> about supporting the inner race with sockets while reassembling.
> But ignore his advice about hitting a bearing with a cold chisel,
> you are wearing a face shield, leather welding jacket, big gloves. Bees
> fly off the bearing. Tiny sharp hot shiny little buggers, that go
> right in.
> See: Stuff I Have Learned 101, filed just next to "Times I have Said
>>> Just did it on the Passat, nearly identical. There's two ways to
>>> do it.
>>> One is an "on the car" press that uses cups, plates and a threaded
>>> rod to
>>> "pull" the bearing out and press the new one in. The other way is
>>> to pull the
>>> knuckle out and use a press of vise and large sockets or what have
>>> you. Press
>>> out the hub which will take one inner race with it and destroy the
>>> Press out the outer race and remainder of the bearing. Cold chissel
>>> the inner
>>> race away from the hub (pound into straight down between the two)
>>> until you get
>>> a gap. A friend's shop usually uses two pry bars and then "pops"
>>> the race off
>>> the hub in a few tries. I didn't have time so I fired up the torch
>>> and cut
>>> it. I've used a grinder too to cut most of the way through the race
>>> then split
>>> it and pop it off.
>>> Press the new bearing into the knujckle (there's snap ringe inner
>>> and outer
>>> btw. Then SUPPORT THE INNER RACE while you seat the hub from the
>>> other side.
>>> Failure to fully support the race from the back will ruin the
>>> Put the hub/knuckle assy. back in the car and align. Or mark the
>>> location well and you might get away without alignment.
>>> See what's free at
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>>> Vwdiesel at vwfans.com
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