Following the advice of the revered Kennyd, and starting the thread on the broken MMM bolt here.
I won't revisit everything - the bolt on the right side (from the top) broke off when the blade caught on the ground, and I have not been able to get the bolt stub out of the spindle on the MMM. I was looking through the drawings on the JD site last night and identified the parts, but it would be nice to have a maintenance and repair manual to tell me how to get the whole thing apart and back together. With most things it is easy to find a free download, but I have not been able to find one for the MMM. Any help would be appreciated.
Erikr, I tried all that on Saturday afternoon for about three hours with no luck and I suspect that I have now damaged the threads in the spindle.