Kodak Instamatic M Series Repairing page 20

part of the shutter.
The spring unit may be cemented to the shutter. Or it may be
spot welded. If possible, remove the spring unit before
you send in the shutter for exchange—the rebuilt shutter
does not include the spring unit. However, if you can't
remove the spring unit, include a note to Fargo Enterprises
indicating that you need the spring unit also. You'll then get a
spring unit for the rebuilt shutter.
You can cement the spring unit to the rebuilt shutter, Fig.
D58. Then align the slots in the spring unit with the shutter
tabs. Cementing the spring unit isn't necessary—once you
install the replacement shutter in the mechanism, the spring
unit stays in place. But, with spring unit cemented, you can
more easily install the shutter.
Clean the shutter and the shutter-drive shaft with a plastic-
safe degreaser—such as the AK225 described in the tools
section. Then use your syringe with shutter oil to lubricate
the shutter-drive shaft where it passes through the pulley-
side bearing, Fig.D59.
There are two types of the shutter-side bearing, Fig. D60—
depending on whether you have the early model shutter or
the late-model shutter. If you have the early style shutter, the
shutter-side bearing has a shoulder—a smaller section that
faces the shutter. A rear bearing for the late-model shutter
has no extension—that's because the shutter has the extended
shoulder at the center, Fig. D56.
But, even if you're installing a late-mode shutter in a projec-
tor that had the early style shutter, you can use the same rear
bearing. Just flip the rear bearing 180°. The flat side of the
rear bearing then faces the shutter.
If you have the late-model shutter-side bearing, take a look at
the surface that faces the shutter, Fig. D60. You may find
that the rear bearing has a groove worn around the center
hole. The groove tells you that someone had installed the
shutter-drive shaft without the washer. The shutter then wore
the groove during operation. After replacing the shutter, flip
the shutter-side bearing 180°. The side that isn't worn now
faces the shutter. And be sure to replace the washer.
You're now ready to replace the shutter and the shutter-drive
shaft. Seat the shutter in the mechanism with the spring unit
facing the claw assembly.
FIG. D59 Lubricating the shutter-drive shaft.
18/KODAK M-SERIES PROJECTORS
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FIG. D57 Spring unit at the front of the shutter.
This one is already loose.
FIG. D58 You can cement the spring unit to
the front of the shutter using Pliobond.
FIG. D60 The groove shows wear in the
shutter-side bearing--most likely, the washer
was left out.
SPRING UNIT
GROOVE