Olympus OM-1 - Shutter and Mirror; Excessive or Insufficient Speed of the Curtains

E-17
II. SHUTTER AND MIRROR
1. Excessive or insufficient speed of the curtains.
1) Improper adjustment of CA8531 (Nut)
The curtain speed is adjusted by 8531. Refer to the checkup column
and make adjustment.
Turn 8531 to the right to weaken the curtain tension and thus slow
down the speed.
Turn 8531 to the left to increase the tension and thus speed up the
curtain run.
Adjustments may be made by 8525 (Shaft) and 8524 (Shaft). Turn them
to the right for stronger tension and faster spped,and to the left for
weaker tension and slower speed. Care must be taken not to deform
the driver groove at the upper end of 8525 and 8524, as it will cause
poor operation of the curtains.
http://olvmpus.dcmentia.org/Hardwurc