Clean disassembled parts of lens and shutter assemblies as follows:

a. Clean unpainted metal mechanical parts with chlorothene. Dry the cleaned parts thoroughly: use a clean lint-free cloth or a gentle blast of compressed air. When cleaning parts of shutter assembly, such as levers and gears, use a small bush moistened with cleaning compound to clean parts thoroughly.b. Wipe painted metal parts, and non-metallic parts, with a soft lint-free cloth moistened with cleaning compound. Thoroughly dry cleaned parts with a clean, dry, lint-free cloth.c. Give special attention to contacting surfaces of contact assemblies (2 and 3, fig. 18, or 2 and 3, fig. 25). If surfaces are tarnished polish them until they are clean and bright.

d. Inspect and replace parts that show excessive wear or are damaged.(I used Ronsonol –lighter fluid– as my cleaning agent. Cheap and easy to find. Just be aware that it is highly flammable. I also used a fiberglass contact cleaning pen to remove all signs of corrosion.)

ABSOLUTE WARNING: Soaking the shutter in cleaning fluid such as Ronsonol without disassembling it removes the grease and leaves the grit. Also this shutter has paper insulators in the sync circuits that can be desolve by a prolonged soak. Soaking is a sure way to destroy a shutter quickly. You don’t want to do that to a shutter you are going to keep. And if you would do that to one you are going to sell, well…