Olympus OM-1 - During Mirror-Up Operation, the; MU Knob Gets Heavy Towards the End of Its Motion

E-35
Even when the mirror is raised.
During mirror-up operation, the
it does not reach the topmost position.
MU knob gets heavy toward the end of
its motion.
Improper selection of the MU ring
Make a proper selection of the MU ring to satisfy the requirement
cited in the Checkup column below.
CA8451
CA8452
CA8453
CA8549
MU ring (outer diameter 2.8*0
.. ( - 3.1*0
« ( " 3. 4*0
« ( " 3.7*0
Checkup
(1) While the mirror is at the original lowered Position, there
should be a space of 0.2 or above between the tip of 8486
and the MU ring.
(2) During the mirror-up operation, the mirror ehouMbe in such a
position that its Up touches the damper and presses it
accurately.
(3) The MU knob should operate smoothly and should not get heavy
toward the end of its motion.
http://olvmpus.dcmentia.org/Harclwarc