It doesn’t appear to be,but I cannot lift the arm away from the casing,using a screwdriver. I can see that by removing the split pin and undoing the nut,the arm will move away from the gearbox and the ball drop out,but I envisage doing that and then trying to put the ball onto the arm,the nut on to the arm and the split pin back in is going to cause a lot of non dictionary words,not to mention skinned knuckles !!! I just wondered if any of the experienced Scott owners might know an easy way.
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