Michael Kadillak , Jul 13, 1998; 03:26 p.m.
I would recommend, prior to attempting such an effort yourself, to call S K Grimes or another qualified shutter expert to determine the cost of a clean and re-lube and the probability that this would solve the slow shutter speed problem. Additionally, I would ask them if partial or complete disassembly is warranted or unnecessary and the type of lube etc. for your specific shutter.
During similar journeys into the unknown or unfamiliar, I have found that the small investment in experience is worth it since I usually end up there anyway after having less than satisfactory results by attempting it myself.