Download Leica M2 service

NOTE: The torque required to overcome friction of the clutch should be between 230 and
270 grams.
(2) Reducing friction. Remove spring (10) and decrease its pressure. Replace the spring
and again check friction with the torsion gauge.
(3) Increasing friction. Place one or more additional washers (8) on holding shaft (13).
Reassemble the clutch. Check friction with the torsion gauge.
4 - 1 1 . Delayed Action Clockwork
(Fig. 4-19, 4-20, 28, 29)
a. Cleaning and Lubrication. Completely submerge the delayed action clockwork (10), fig. 28
in benzine and move it rapidly back-and-forth. Remove the clockwork from the bath and use compressed
air to dry it. Oil all bearings and again submerge the clockwork in benzine for a brief period. Remove
the clockwork from the bath and blow out the benzine, leaving a thin film of oil on the bearings.
b. Replacing Spring (fig. 29). Insert spring (1) in spring carrier (3) and wind it until it fits into
the spring housing. Place the free end of the spring on stud (23).
c. Adjusting (fig. 4-19). After the delayed action clockwork has been installed, and the camera
inner housing inserted in, and secured to the outer housing, wind the clockwork spring as follows:
RUN DOWN POSITION
RELEASE BUTTON
RETAINING SCREW
DELAYED ACTION LEVER
TENSIONED POSITION
Figure 4—19. Delayed Action Lever, Tensioned Position.
(1) Tension the clockwork spring by turning the delayed action lever counterclockwise as far
as it will go (fig. 4-19).
(2) Loosen the left-hand-threaded retaining screw with tool 42-253.01-597W2. Lift the lever.
rotate it clockwise to the vertical position, and immediately tighten the retaining screw.
(3) Fully tension the clockwork spring by repeating the procedures in (1) and (2) above two
or three times.
(4) Set the camera shutter speed dial to " B " , wind the shutter, and depress the delayed
action release button. The delayed action clockwork should not release the shutter. If
the clockwork does trip the shutter, increase tension of the clockwork spring as in
(1), (2) and (3) above.
(5) Hold the delayed action lever in its vertical (run-off) position and loosen the retaining
screw, permitting the clockwork to operate.
(6) Tighten the retaining screw immediately after the second shutter curtain has been released
4-16