Originally Posted by
juvela
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thank you for the update
if you need to resort to hammering to get the crank cotters removed it is important to support the backside of the crank head solidly on an anvil or similar so that the impact of the hammer blows goes only to the crank cotter and is not transmitted to the bearings and the races otherwise it is possible to brinnel (dent) the races
conceivable that the dents you found may be the result of hammering
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We supported the crank head on a several kilo weighing sledgehammer when hammering, but the crank arm corresponding to the end with the dents in the axle has been opened by someone before because the cotter pin had been replaced so I cannot of course know how the previous owner has opened it.