Olympus OM-1 Repair Manual page 29

B-8
If the groove position does not correspond with 9047, the sprocket
will not be synchronized at the moment 9141 is returned to its.
original position but left released. In this case, winding
operation needs to be repeated until 9047 fits into the sprocket
groove.
Position of 9044 at
the time the sprocket
is synchronized.
(3) Release for CA8849 (KS spring) Action:
At the time of film advancing motion, the embossed portion of (8847)
is rotated in the arrowed direction and hits 8842 immediately prior
to completion of shutter charging action. (8847) turns 8842 in the
arrowed direction to release the lock. If the shutter is operated
while 8842 is in contact with the embossed portion of (8547), the
8849 engaged on 8842 works to push (8847) and the curtain speed
is influenced. Therefore, such should be avoided.
(8547)