Seiko #0 Shutter: Rebuilding the Speeds Escapement
Originally posted on Instagram. Notes from the repair bench, kept here as a searchable archive. View the original on Instagram
The speeds escapement that controls shutter speeds in the Seiko 0 shutters used in Mamiya C series TLR lenses and the Press series can develop issues such as broken pivots or damaged teeth. This particular example had a broken tooth on one of the geared wheels. In the past I would just replace the complete part as it really was not made for disassembly and replacing individual bits but with parts getting scarce, I now rebuild them. The first photo shows the complete escapement as removed from the shutter, second photo is the escapement disassembled and the third photo is of the gear with a broken tooth. It is a delicate operation but I find it relaxing.
