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Removing 3 piece crank bearings safely......

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spadey99:
Hi guys

I bought the Webco bike off Danny but want to use the Webco lovely chrome 3 piece crank on another build, I need to remove the sealed bearings from the B B but want to do it safely and with no damage...

Used google etc but just wanted to know what you lot think??? 3/4 extension bar with cloth on end and tap round?

Any tips is as always appreciated.......

Steve  :crazy2: :crazy2: :knuppel2: :knuppel2:

BMX1973:
If your unsure take it to a bke shop, as they will have the correct tools.  :daumenhoch: I did,  as I was scared to remove myself  :-\

GTnumber1:
do what every body else does mate hammer and screwdriver  :LolLolLolLol: :LolLolLolLol: :LolLolLolLol:


either use a big socket or a ratchet extension bar with a hammer, will come straight out with no marks  :daumenhoch:

spadey99:
Hi Gtnumber1

just pm you.... So do the bearings come out of the carriers? And how do I get a extension bar in there with the spacer and which bit do I hit..... :knuppel2: :knuppel2: :knuppel2:

nosepickben:
A 3/4 extension bar will fit through the first bearing. The spacer tube should have just enough play in it to allow you to knock the inner face of the other bearing. If the spacer is tight, you need to dislodge it by jemmying it with a screwdriver a bit. Hit gently then move the spacer a quarter turn every few hits. Keep checking you work around, whether the bearing or cup is emerging from the bb shell and hit on the side thats still furthest in so the bits come out evenly. The spacer will get easier to move aside as the bearing comes further out. Once one side is out, the other is simple. If the bearings need tapping out of the cups afterwards, then open a vice to just over the diameter of the bearing thenpplace it upside down and tap the bearing down and out into the jaws

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