tech
keepemflying
race. If completely smooth, I’ll reuse them. With everything clean, I reas- semble everything on the axle. With the axle nut tightened down,
the adjuster outer part should turn easily and smoothly. You should be able to push that piece to the side, feeling or hearing a “click” as it goes. This tells you there is proper preload on the bearings. If they are loose, you need a thinner “wedding ring” (shim) adjuster. If they are tight, a larger ring goes in. As the bearings wear in, the assembly usually loosens up. If you don’t have a big assortment of these rings, you can make the one you have smaller by dressing it on a flat file. File a few strokes and fit it, file a few strokes and fit it. Just keep going until you get the “clicking” sensation when pushing the outer adjuster part. Once the assembly is properly
adjusted, I take it apart again and apply clean grease to the bearings and the adjuster. The four-inch pipe is used, and the axle and greased assembly goes in a plastic bag and into the freezer. After a half-hour or so, I heat the wheel hub, then get the assembly from the freezer and drop it right into the hub. I seat it with a tap of a rubber hammer; replacing the bearing seal carrier and the hub caps is next. That’s it! This is one of those jobs where it is really helpful to see it done before doing it yourself. I would like to have this project
finished by the time I leave with Susanna to trailer the two airheads to warmer roads south of here in early February. Should Strider still be in pieces, I’ll take the Mexico Bike in its place. The time-honored Law of Motorcycle Repair still stands: In order to repair a non-running bike, you need one that does run.
The cleaned up and greased bearing assembly being checked for proper preload by pushing on the middle outer spacer. If it moves to the side with a "click" sound or feeling, you are at the right amount of preload tension. It will now go in the freezer for 30 minutes or so before being put back into a heated wheel hub.
The assembly, cleaned up and ready to check for preload. From Left to Right: The spacer, the "inside" bearing, the inner and outer shim carrier, the shim (often called "the wedding band") and the"outside bearing.
42
BMW OWNERS NEWS February 2017
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