Originally Posted by
JohnDThompson
Has the upper pivot spring become disengaged? If there is no spring tension on the upper pivot, the pulleys will be pulled too far forward; the spring has either come out of hole in the stop plate or tension bolt, or is broken. The spring (part #2973) in the picture below, has a pins that fit into the plate (part #2978) and tension bolt (part #2977) and must be preloaded to provide tension.
thx for this great detail. Now I won't go in blind if/when I take this apart. I always have problems visualizing (and remembering!) if I take something intricate apart.