Niko Koskela , Jun 01, 2004; 02:24 a.m.
Dave, Chris Sherlock has strip-down instructions for a 50mm Takumar on his site: http://homepages.ihug.co.nz/%7ESrawhiti/pentax50mmf1.4.html
I myself have not stripped down a 135/3.5, but various other takumars and all of those i could strip down following these instructions. I´d guess you can do it for the 135 too with those instructions. Actually stripping down a Takumar is quite simple, after you have stripped down one the first time, you know how to do it. The hardest part in disassembling was removing the "name ring" surrounding the front element... That will be difficult especially if there´s even lightest of damage on the filter threads.
Good luck ! Not that you need it... ;) Really !
P.S. Hopefully someone who has disassembled also the 135 can confirm that it´s not too different from other Takumars ?