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Front wheel double row bearing

Discussion in 'Norton Commando Motorcycles (Classic)' started by fiatfan, Jan 14, 2020.

  1. fiatfan

    fiatfan VIP MEMBER

    Joined:
    Aug 9, 2015
    Need help, don´t know what to do with the new double row bearing I bought from RGM, thought maybe I could get a quick answer here. The bearing has some kind of plastic protection bits on both sides, never seen those before. They´re kind of half see-through and as far as I can see there´s no grease inside. Are you supposed to remove them and fill it up with grease? That´s what I´d like to do......
     

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  2. Tornado

    Tornado VIP MEMBER

    Joined:
    Dec 5, 2017
    Perhaps its a translucent grease and you can't make it out through the seals?
    Most sealed bearings have opaque plastic seals so never gave a thought to if there really was grease inside. You could pry off a seal to confirm then refit it. Not held in with adhesive typically.
     
  3. jbruney

    jbruney

    Joined:
    Jan 5, 2019
    Or just begin forcing grease in the openings with your fingers... Been there done that. Eventually you'll get it packed well enough. Then I don't like prying shields from new bearings for fear of introducing trash.
     
  4. L.A.B.

    L.A.B. Moderator VIP MEMBER

    Joined:
    Nov 20, 2004
    Last edited: Jan 14, 2020
    Nater_Potater and Tornado like this.
  5. Pushed it n rode it

    Pushed it n rode it

    Joined:
    Jun 10, 2019
    Pack it with grease through the orifices, mine arrived last week, unshielded. Different supplier. As L.A.B stated it looks like the bearing cage.
     
  6. fiatfan

    fiatfan VIP MEMBER

    Joined:
    Aug 9, 2015
    It´s not the cage, some kind of cover. No way to pack grease without removing them. I´ll send a message to RGM.
     
  7. Time Warp

    Time Warp .......back to the 70's. VIP MEMBER

    Joined:
    Dec 3, 2012
    If it has a seal 2RS or otherwise it will have grease already but why not a bearing from any bearing/seal store.

    A small bit of machining and a wider fully sealed (2RS) bearing can be used, quality (non Chinese) and being sealed will not need replacing for decades, be off the shelf and available near anywhere.
    The front disc hubs are all but made for the wider bearing.
     
  8. fiatfan

    fiatfan VIP MEMBER

    Joined:
    Aug 9, 2015
    It´s not a 2RS, if it was I shouldn´t have asked since I know what they look like. This is as I wrote a type that I´ve never seen before. This is what RGM say´s: "THE OTHER BEARING INCLUDED IN THIS KIT IS AN SKF DOUBLE ROW BEARING NUMBER 4203 - THIS IS NOT A SEALED BEARING." Dispite this there is some kind of plastic shielding on both sides. So I guess I´ll just rip those out and fill it with grease.
     
  9. Time Warp

    Time Warp .......back to the 70's. VIP MEMBER

    Joined:
    Dec 3, 2012
    Just looking at that bearing in the picture I can tell it is a ATN9 (Moto Guzzi content) so I think you will find removing bits will not be a good idea.

    Edit and 5 minutes I will never get back looking for it and then taking a picture. :D
    Here is a similar bearing (new) I replaced it with a 2RS wider 5000 series.
    Note the cage.

    brg.jpg

    Ball element bearings are usually greased and the choice is limited to RS or ZZ (steel shield) as far as protection goes.
    I can not off hand think of any extra bits added in the cage area that are removable.

    I will hazard a guess the cage in that bearing you have is very flexible.
     
    Last edited: Jan 15, 2020
  10. Pushed it n rode it

    Pushed it n rode it

    Joined:
    Jun 10, 2019
    Is it the old melt out type protection that you can peel off with a fingernail ? Then pack once cleaned out !
     
  11. norton73

    norton73

    Joined:
    Dec 11, 2008

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