Simple Newbie Question -OiF 1972 T120

[Dunc6001]

Hi and hello all, looking forward to reading and participating in your forum.
Hopefully a quick and easy question to start.
I'm doing a full oil service on my 1972 OIF T120, all looks straight forward however where do you drain the Primary case - is it the adjuster bolt?
Any other tips happily accepted.
Thanks
Dunc

[L.A.B.]

I'm doing a full oil service on my 1972 OIF T120, all looks straight forward however where do you drain the Primary case - is it the adjuster bolt?

http://www.classicbike.biz/Triumph/Repair/1970s/72Triumph_650cc_Twins_Workshop_Manual.pdf

Section C3, & Fig.C4. (or A12 Fig.A12)

[Dunc6001]

Thanks.
A simple diagram explains a thousand words - perfect.
Thanks also for the download - the Workshop Manual seems more comprehensive and easier to understand than my current one.
Best
D