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John, We've had really good luck by removing the pads, extending the brake pistons and cleaning the pistons with brake cleaner and a toothbrush. Ten to one you'll find one or more pistons per side that won't extend properly.
The major theory is something to do with the surface treatment of the pistons...I don't know, but the above procedure works very well.
Brad
The major theory is something to do with the surface treatment of the pistons...I don't know, but the above procedure works very well.
Brad