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bearing replacement







                             heat up the drum



                                             +100°C
                                                                   bearing ring cool down





                                                                                                   -18°C








        Good advice is to heat the drum                         With the drum or disc at tem-

        or disc with a paint stripper (to                       perature and the bearing race at

        60°C) or with a gas burner (to                          -18°C, the insertion of the wheel
        120°C) as described in edition                          bearing race will be done with-

        20. If you have an infrared ther-                       out obstruction, it must be done

        mometer, you can determine                              quickly. Make sure that the bear-
        the temperature accurately. The                         ing race is knocked in perpen-

        bearing race in the freezer for                         dicularly with the appropriate

        half an hour will help to make                          bearing drive, until the sound

        the press fit less tight.                               changes from sharp to dull. This
                                                                is the sign that the race is leaning

                                                                against the drum surface, against

                                                                the back of the drum or disc.
                bearing race                                    On the left we show the end re-


                                                                sult. The bearing race of the out-

                                                                er wheel bearing is pressed into
                                                                the drum and is ready to receive

                                                                the conical bearing. The conical

                                                                outer bearing does not have to

                                                                be inserted yet, first the inner

                          drum surface                          bearing and grease ring have to
                                                                be mounted.




                            Paruzzi Magazine 20                                                               23



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