I recently purchased an SP 15 and am finally getting around to cleaning/restoring it to printing condition. In the process I came across what appears to be a broken trip spring. Since the gears and trip mechanisms were an inky, greasy disaster I decided to pull the side plates and give it a thorough cleaning while fixing the spring. (I know that many advise against this but I have spent a good deal of time repairing/restoring cars and motorcycles so hopefully that aptitude will translate) My only hang up is with the lock nuts that attach to the stud (x-20494) that is the pivot for the trip arm assembly. I have the manual but it doesn’t really show how this part is removed. Here is a photo of what I am looking at:
Any advice is much appreciated and many thanks for the blog.