I replaced the bearings where worn and re-packed the ok ones. The yokes are in good condition as there is no play in them so the bearings are a good tight fit. Tension on the spring is 4 1/2 inches also. The belt is a grey one which the V is off centered. Don't know where it came from.

Can't think what i have done for this too happen? Maby somehow the belt needs more tension now??
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