Alan Posted May 2, 2006 Report Share Posted May 2, 2006 Hello, My friend has just bought a BMX and the non-drive side crankarm bolts is rounded off and the BB bearings need to be changed, He likes his cranks and BB atm so no angle grinding! What can you suggest to get the crankarm off and the bearings out?Cheers, Alan. Quote Link to comment Share on other sites More sharing options...
Mark W Posted May 2, 2006 Report Share Posted May 2, 2006 If it's a standard 3-piece crank, undo the right side bolt and hammer the spindle through the BB with the left-side arm still attached? Having done that, you should then be able to push arm further onto the crank arm slightly, meaning you can get some mole grips on the bolt's side, to undo it. Quote Link to comment Share on other sites More sharing options...
Alan Posted May 2, 2006 Author Report Share Posted May 2, 2006 (edited) If it's a standard 3-piece crank, undo the right side bolt and hammer the spindle through the BB with the left-side arm still attached? Well thats what i said but apparently he tried that Heres how it went ALAN: take off drive side and hammer the axle-bearing-crank arm out as one ALAN: like 2 piece cranks :)Rob: will it go through? :)Rob: 2 mins ALAN: it might do ALAN: i dnt see why not, other people have done it like that :)Rob:D: na it dnt lol ALAN: use a mallet or hammer? :)Rob: everyfin :)Rob: foot :)Rob: pole :)Rob: dog Edited May 2, 2006 by T-MAGura Quote Link to comment Share on other sites More sharing options...
Mark W Posted May 2, 2006 Report Share Posted May 2, 2006 Like I said - if it's a standard, 3-piece set of cranks, you should be able to do that (unless it's a well old unsealed design or something). It takes a load of hammering sometimes, but it will work. I've found that an 8mm allen key and a hammer usually does the job (8mm going through the crank arm and going onto the END of the axle (not into the threaded part or anything stupid , then hammering that). Quote Link to comment Share on other sites More sharing options...
ScotchDave Posted May 2, 2006 Report Share Posted May 2, 2006 If all else fails araldite a cheapo socket onto the bolt. Quote Link to comment Share on other sites More sharing options...
Alan Posted May 2, 2006 Author Report Share Posted May 2, 2006 If all else fails araldite a cheapo socket onto the bolt. Allen key bolt. Quote Link to comment Share on other sites More sharing options...
ScotchDave Posted May 2, 2006 Report Share Posted May 2, 2006 Even better, allen keys are cheap, just araldite an old fecked one in. Either that or get an easy outer. Quote Link to comment Share on other sites More sharing options...
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