Rate this post by selecting a number. 1 is the worst and 5 is the best.

Author Message   Glenn Tinkerer Username: Glenn Post Number: 938 Registered: 07-2006 Rating: N/A Votes: 0 Posted on Thursday, July 07, 2011 - 06:14 am:    You are thinking in the right direction, but the gauge is far more sensitive than a torque driver. I have not got my M Series repair manuals to hand and it is a long time since I read them in detail, but I seem to remember that the units are grams. Anyway this is a minor problem since most people tension the springs by rotating the shafts a specific number of turns. A Google search will come up with plenty of sound information. However Tomosy gives a very good write up in his book on restoring classics. The following Google Book link gives you the full details - http://books.google.co.uk/books?id=NSP6sQk2avkC&pg=PA53&lpg=PA53&dq=leica+shutte r+spring+tension&source=bl&ots=ofwkXxhtYU&sig=mNpAvasQl5lsrZxBAHmpGYTtzOE&hl=en& ei=WZ8VTvyhIsHQhAed0_RN&sa=X&oi=book_result&ct=result&resnum=9&ved=0CHYQ6AEwCA#v =onepage&q=leica%20shutter%20spring%20tension&f=false