Ok, Jeff, here it is, as promised.
How I Did It.
Things youll need: 1. A sturdy workbench of some kind the bigger the better. 2. Some old towels or similar thick cloth. 3. A heavy hammer or mallet I used a heavy ball peen hammer. 4. A drill with drill bit large enough to drill an approximately 19mm hole thru thick wood blocks (2). 5. Two thick wood blocks, at least 2.5 inches thick pine or oak, doesnt matter. 6. A countersink punch or similar steel rod slightly larger on one end than the other but smooth and blunt on both ends. 7. A smaller hammer. A small ball peen was fine for me. 8. A vise of some kind. I used a wood vise but I dont think it matters. 9. Another piece of sturdy scrap wood to use for protection of metal parts when you strike them with the hammer. 10. Two replacement cartridge bearings (generic) UB-6003, 17mm inside diameter, 35mm outside diameter. $4.90 ea. from the Third Hand/ Loose Screws (www.thethirdhand.com). 11. Double duty snap ring pliers item #NH 158673 from same company as above. 12. Another pair of hands is helpful. 13. Patience. Remove the snap rings from the both side of the spindle. I had to file the prongs of my snap ring pliers to fit the tiny holes in the rings. I also broke or bent the rings in the process. Secure the frame flat on the work bench top so that the BB is accessible to you, extended just over the edge of the table. I used the towels to support the frame to avoid damage or stress and so that it was a flat as I could get it. This is where an extra pair of hands come in handy. I did NOT clamp it down. It doesnt matter which side you start on. Put a piece of thick scrap wood over the end of the spindle and strike the wood sharply with the heavy hammer or mallet. Check your progress after each couple of blows to get a feel for whats happening. The goal of this exercise is of course to drive the spindle out of the bearings, but you will discover that you will also remove the opposite bearing in the process which is good. Be strong be firm...be patient prayer helps. Once you have the spindle with the opposite bearing out of the BB, turn the frame over and use either the countersink punch or something similar to knock the remaining bearing Out of theBB. You can then knock the spindle out of the still attached bearing by putting the bearing in a vise and striking the spindle end with the hammer (dont forget to use the wood block always use the wood block and never, never strike the spindle directly with the hammer). Clean out the BB and clean the spindle just dont do anything to change the shape of the spindles where they fit into the bearings. Place a new bearing on a thick wood block in which you will have drilled a hole big enough to allow for passage of the spindle (about 19mm). Center the bearing over the hole. Place the spindle into the bearing and drive it it into the bearing, again using the wood block to protect the spindle end. Drive it in until the circlip groove is just visible outside the bearing. Then place the spindle with the attached bearing into the BB and gently tap it into place by placing the wooden block with the hole, over the spindle and driving it in until the bearing is flush with the face of the BB. Now turn the frame over and support the spindle and bearing you have already placed with that same wooden block and enough rags, towels, or whatever, so that it is flat and well supported on the bench. Place the other bearing on the spindle and, using a second wood block with a 19mm hole drilled in it, drive the bearing into place until flush with the face of the BB. This process will probably require several maneuvers befoer you have both bearings in position and the spindle properly centered with the circlip groove just showing on the outside of each bearing. ***Important: remember that the spindle is slightly longer on the crank side so be certain to install it that way the first time!
You may find as I did that the spindle will not turn easily at first because the bearings are not perfectly parallel to each other in the BB. I used the countersink punch to GENTLY fine tune the position of the bearings until the spindle moved satisfactorily. Dont lose patience as it may take a bit of trial and error before you are satisfied. I dont think it has to be absolutely perfect because I believe that once the crank and pedals are installed and some pedaling motion can be firmly applied, that the alignment will tend to correct itself. At least thats my theory and Im stickin to it! I have not found suitable replacements for the snap rings on the spindles. Good luck! Regards, Dave Van Hook Hershey, PA
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