Pressing in bearings created shavings

[Vanguard]

One of the tasks I completed during the rebuild of my SN-89 Paxton blower was pressing in new bearings.

I adjusted the shim thickness to obtain the proper torque but noticed that some dust had accumulated in the case .

Knowing that any dirt within the supercharger would probably mess something up in a short time, I decided to take the blower completely apart and wash it with brake kleen.

I reassembled all the clean parts and used the shim thickness from the previous setup. I also pressed in the rear seal beforehand and found that it required 5 in-lbs to rotate.

Once the blower was assembled I checked the rotational torque it was way over 50 in-lbs .

I removed a few more shims, checked the torque and it was still too high.

I decided to press bearings back out and found the problem.

Apparently some aluminum chips scraped off the bearing housing surface when I pressed them in and prevented the bearing from fully seating.

I am going to scrape off the high spots and sand the bearing sidewall with 1000 grit paper and try it again.

Has anybody had a similar experience like this ?

How do professional rebuilders push these bearings in ?

[Formulalt1]

You used lube while pressing, right?

[pavement pounde]

Never had that experiance before.
And I thought I saw it all.....

[Vanguard]

formulalt1, I used type F trans fluid when I assembled it.

Update,

After finish sanding bearing housings with 1000 grit sandpaper and washing with brake kleen, I lathered up the the bearings with wheel bearing grease and pressed everything together.

I noticed that they went in much more smoothly this time.

thanks for the tip

[pavement pounde]

I don't know about the wheelbearing grease.
It is going to be mixed with oil you know.

[Vanguard]

Pavement pounder, what is your method of pressing in the bearings ?

[speedytang]

I myself freeze them and they slide in like butter. Your going to need to flush the unit really well because grease does not mix with ATF. The unit uses fricition to operate so I don't think grease will work to well. LOL

[pavement pounde]

I pressed them in with a pressin device.