u/Beneficial_Many_216

Hi all! I recently got what was advertised as a broken Nikon FM2 as the shutter was stuck, but all it needed was a good clean and oiling! I’ve managed to get all the high shutter speeds working as they should mostly, however the slow shutters (1/60 and below) are still very notably audibly much slower than they should be, and 1/2 and 1 rarely ever fire at all.

Basically I was wondering if anyone knows any guides as to what parts need to be cleaned and adjusted to get these parts working as they should be? Or if anyone has done anything like this themselves and knows which parts to clean/Lubricate?? Basically trying to avoid taking apart the whole camera if there is a way to do without having to go that far. Thx!