K1100 Alternator Simmering and bearings

  • Hello!
    I have been calling all day different Bearings and seals distributors and searching for simmering for alternator drive. Catalogue says that it is 26x42x5,5/7. Yet I can't find it, there is 26x42x7. Is there anything spetial about that simmering like dry installation, double lip, etc. or it is a regular one.
    And do you know the type of alternator bearings in K1100, afaik it is different then in K2V.


    Best regards,

  • I´d order the Simmerring from BMW


    afaik.:
    No altenator spares from BMW (K1100 50AH )
    I´d go to Bosch with that

    Ein Y-Chromosom macht das Leben unbeschwert

    Grüße von Olaf aus H-U

  • Quote from "zonenfeile"

    I´d order the Simmerring from BMW


    Well that is an option. Yet the BMW part price is 50 pln, when local manufacture that specialise in seals and aeroplane hydraulics will charge 1/5 for custom made one :/


    A trivial question: what is the direction of the alternator rotation in K, let say looking form aft of a motorcycle?


    Best regards,

  • Quote from "Rafal"

    I have been calling all day different Bearings and seals distributors and searching for simmering for alternator drive. Catalogue says that it is 26x42x5,5/7. Yet I can't find it, there is 26x42x7. Is there anything spetial about that simmering like dry installation, double lip, etc. or it is a regular one.
    And do you know the type of alternator bearings in K1100, afaik it is different then in K2V.


    Best regards,


    Is it a regular one? Yes, it is a regular seal. There is no double lip. It is dry installaiton but that is a result of its construction from a PTFE material. The one you've found should function. When I fixed the bearing in my intermediate housing that had failed, I found out from a local bearing supplier that both the bearing and the corresponding seal were bog-standard parts, available at any well stocked bearing supplier.


    Type of alternator bearings? The bearing in the intermediate housing that supports the drive dog is a 6004-C3. The bearings inside the 50A alternator used on the K1100 and K1004V are:
    Rear-small: 6203 RS or 6203 2RS (rubber seal) 17mm ID x 40mm OD x 12mm W
    Front-large: 6303 RS or 6303 2RS (rubber seal) 17mm ID x 47mm OD x 14mm W

    Quote from "Rafal"

    A trivial question: what is the direction of the alternator rotation in K, let say looking form aft of a motorcycle?


    Counter clockwise, as viewed from the rear of the motorcycle looking forward.

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