r2000swler@hotmail.com wrote:
> I received my new (OEM) wheel bearing today, only set me back $100.
>
> I am ready to go except for one little thing.
>
> Am I likely to have to use a "wheel puller"? I can't figure out how
> to attach the three legged puller that I have to the hub.

not necessary - just comes off by hand once the stub axle nut is off.

>
> I can fabricate a piece of angle iron with holes drilled for two studs
> and a center hole for a pushing nut and bolt. Should I plan on going
> to this trouble, or can I expect the old hub/bearing to "pop off.
>
> It is very interesting to listen to wheal bearings with an high gain
> amp and microphone.
>
> At work we have a big production unit , big as in 60' wheel base, that
> one of the drivers suspected a wheel bearing was going bad. By ear you
> couildn't really hear anything. So I used my electronic stethescope and
>
> sure enough it was much noisier then the other bearings. We recorded
> it
> and used "gram to display the audio FFT. It works out that both of the
> rear most bearing, left and right, have an odd repetative/periodic
> "grinding" noise that is very visible on FFT. The bad one you can hear,
>
> the other one you can see.
>
> My hobby is shortwave radio and I use FFT to view signals you just
> can't hear. I never thought there would be any practical use for this.

got any links? i'm interested for analyzing some accelerometer signals.

>
> They took the truck in for service and we cut the old bearing open
> and sure enough there was "scuffing" on both sets, and the noisiest
> had the most scuffing. A new tool for predicting trouble well ahead
> of time.

i just use a stick for stethoscope stuff like that. if you've seen the
movie "das boot", you'll see one of the diesel mechanics giving a demo
of how to do it.

>
> I have borrowed my wife's latop and I am hoping to see if I can do
> some real time tests before I repair my car.
>
> Terry
>