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Thank you for your reply Jim. I would love to be able to confirm your
opinion, but firstly, the gears move so slowly that it would take many
minutes, or even hours, depending upon which gear, for the damaged tooth to come round, not 10 to 20 seconds. Also, the noise would be regular, and it is not, varying between the two mentioned figures.
A third problem is that it only happens when the weights are on one side of the mount; that changes nothing as far as the drive is concerned, it would happen all the time if a tooth was damaged. I may have to strip the whole thing. Incidentally, I inspected and greased the gears and
they look to be in mint condition. I do it regularly, as the gears are so
easily accessible.
raymo
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