A.O. 820

From:Mary Lou Norman <mlm11@cornell.edu>

Hi,
Looking for mechanically minded folks. A newbie decided to work the wheel 
on an A.O. 820 microtome backwards. Now the block is not advancing. No 
ratchet sound. Hopefully this is an easy  fix and I'm missing it. Any 
suggestions would help.
Thanks,
Mary Lou




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