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Engine basics => Engine set up tips => Topic started by: frank mccune on September 14, 2018, 05:18:17 PM

Title: How to remove rear bearing from crankshaft?
Post by: frank mccune on September 14, 2018, 05:18:17 PM

       Hi All:

        I am attempting to remove the rear ball bearing that appears to be stuck to the crankshaft.  How do I do this since there is no space between the bearing and the crank disk for a puller etc.? I did apply heat and attempted to work a thin tool between the outer bearing retainer and the crank disk, not the best way, there was no movement.  I did crock pot the parts prior to attempting this task. Is a very small bearing splitter available for this task?

        Suggestions/cpmments?

                                                                                                                                               Tia,

                                                                                                                                               Frank Mc cune

Title: Re: How to remove rear bearing from crankshaft?
Post by: pmackenzie on September 14, 2018, 05:58:16 PM

You didn't say what motor it was.
One motor that is very hard to get the rear bearing off was the Nelson 15 RV.
Press fit onto the shaft, so you need to make a tool to clamp on the outer race.

Title: Re: How to remove rear bearing from crankshaft?
Post by: M Spencer on September 14, 2018, 07:34:11 PM

Technically , there IS a GAP .

(http://www.creative-pro.net/cars/hf_bearing_separator.jpg)

Thisis whatyou need , more or less .

But Coles here Steak knife sets , are good for opening cans of beans and other things .

One Ea Side , tapping in evenly ,  :-\ or just go around with one . Heat & Gloves .

You cout ding / put a  stress raiser on a unhardened crank with a knife / chisel edge & hammer .
Support the thing so you NOT bending it . I.E. a piece of hardwood under shaft so it sits flat on the bench while you abuse it .

Title: Re: How to remove rear bearing from crankshaft?
Post by: Brett Buck on September 14, 2018, 10:45:08 PM

I would note that almost everything mentioned here will completely destroy the bearing, so have a replacement in hand before you start.

     Brett

Title: Re: How to remove rear bearing from crankshaft?
Post by: frank mccune on September 15, 2018, 08:42:19 AM

     Hello All:

     Thanks for all of the replies. Walter, that was a very generous offer you made thank you.

     I have decided that the bearing is in good enough shape to be run.  It was stuck with dried castor oil but has since been cleaned.  It now sounds and feels good.

                                                                                                                                      Be well my friends,

                                                                                                                                      Frank McCune

Title: Re: How to remove rear bearing from crankshaft?
Post by: Mike Greb on September 15, 2018, 10:49:08 AM

I raced k&B 5.8 motors for years in slow rat. The rear bearings were a pressed fit on the shaft.   I could usually rest the crankshaft  and bearing on the edge of a pocket knife, and take a rubber mallet and tap on the other side.   That would move the bearing enough so I could work two screwdrivers underneath the bearing and work it off.