Hollowtech II Question

carl_p
carl_p Posts: 989
edited March 2011 in Workshop
More out of curiosity than necessity at this stage, but the BB cups are printed with "Do Not Disassemble". Why is this?
Specialized Venge S Works
Cannondale Synapse
Enigma Etape
Genesis Flyer Single Speed


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Comments

  • John.T
    John.T Posts: 3,698
    edited March 2011
    Because it is almost impossible to get them all back together properly. :lol:
    My Fleet.
  • jj1048
    jj1048 Posts: 107
    Because then you will realise that they are serviceable and you wont buy new ones.
  • carl_p
    carl_p Posts: 989
    John.T wrote:
    Because it is almost impossible to get them all back together properly. :lol:

    Seriously? The Youtube vids I've seen suggest it's a fairly simple job with the right tools.
    Specialized Venge S Works
    Cannondale Synapse
    Enigma Etape
    Genesis Flyer Single Speed


    Turn the corner, rub my eyes and hope the world will last...
  • John.T
    John.T Posts: 3,698
    edited March 2011
    Carl_P wrote:
    John.T wrote:
    Because it is almost impossible to get them all back together properly. :lol:
    Seriously? The Youtube vids I've seen suggest it's a fairly simple job with the right tools.
    With the right tools as you say. How many of us have them. The plastic sleeves in the bearings are rather soft and damage easily. Supporting the cups to remove the bearings is not easy either. It is actually stripping them down that is the hard part. If you did that successfully then you should be able to rebuild them OK.
    Nothing is difficult on Youtube. :wink:
    My Fleet.
  • thel33ter
    thel33ter Posts: 2,684
    jj1048 wrote:
    Because then you will realise that they are serviceable and you wont buy new ones.

    This, just make sure you don't break any of the plastic seals.
    And now you know, and knowing is half the battle
    05 Spesh Enduro Expert
    05 Trek 1000 Custom build
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  • rake
    rake Posts: 3,204
    thel33ter wrote:
    jj1048 wrote:
    Because then you will realise that they are serviceable and you wont buy new ones.

    This, just make sure you don't break any of the plastic seals.
    i have seen places where you can buy fresh plastic top hats.
  • markos1963
    markos1963 Posts: 3,724
    TBH with Ultegra BB's available for less than £20 if you shop around why would you bother stripping and servicing? I changed mine over last season(after 5000 miles) and it took me 7 mins to do from start to finish, probably less time it takes to watch the YouTube vids.
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  • nicklouse
    nicklouse Posts: 50,673
    Betd and others do a bearing replacement service and if you can lose the plastic sleeves the better as you can then run a bigger bearing.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • rake
    rake Posts: 3,204
    nicklouse wrote:
    Betd and others do a bearing replacement service and if you can lose the plastic sleeves the better as you can then run a bigger bearing.


    its only 1mm internal diameter difference, and the bigger bearing isnt a standard size so your choice of quality/supplyer are very very limited.
  • nicklouse
    nicklouse Posts: 50,673
    rake wrote:
    nicklouse wrote:
    Betd and others do a bearing replacement service and if you can lose the plastic sleeves the better as you can then run a bigger bearing.


    its only 1mm internal diameter difference, and the bigger bearing isnt a standard size.

    many people do them.

    Enduro, token even the ones in the sram BBs dont use inserts and they are fine with a 24mm ID

    as a for example

    http://www.enduroforkseals.com/id182.html
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown

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