Mamiya Press 100mm f/3.5: Sticking Shutter Cocking Ring
Originally posted on Instagram. Notes from the repair bench, kept here as a searchable archive. View the original on Instagram
This Mamiya 100mm f/3.5 lens being serviced is for the Press/Universal line of cameras. Typical issue of sticking shutter cocking ring. On opening the shutter I notice lots of moly grease over lubrication.
Photo four shows a lot of lubrication residue on the press focus lever and speeds escapement.
Photo five shows the caked-on lubrication around the cocking ring bearing assembly and photo six shows how it should look after cleaning. Lubrication should be put sparingly on the cocking ring, not piled up on the bearing.
Other than cleaning and lubrication, the shutter was in very good condition and looks to have been well taken care of. Many of these older chrome shutters have seen lots of use over the last 50-60 years and did not fare as well as this one.
