I have also had to remove the pedals from the cranks, in order to free up the detent balls. Last thing you would want is for the pedal to work it's way inward and get caught up on the frame. I put penetrating oil on the detent ball, and tried to work it loose....no luck. I was about to drill a small hole behind the ball and force some grease in to puch the ball out, when I though I would give a try at simply drilling out the ball. It never should have worked, but it did. The drill bit cut right through the detent ball and cleaned out the hole. It certainly was not any type of ball bearing I am used to. A drill bit never should have been able to do that. Hopefully I'll get as lucky on crank number two.
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