I am a long time lurker, finally making a post as I need help.
I have been very fortunate to purchase a 29K70 head (no base, the couple who owned the machine turned the base into a table {aaaaaaakkkk}). After much cleaning and oiling the wheel is turning reasonably smoothly and all parts appear to be in working order. I have a treadle base from a domestic machine that I intend to modify to work as a base, not the same I know -- I do not expect to get the same amount of power that a proper base would provide.
The manual has this important piece of information on the first page, and I quote: "NOTE: Machines are threaded when sent from the factory, and the operator should note carefully the manner in which this is done before removing the thread from the needle." Of course, the couple I bought the machine from did not have it threaded and it appeared to have set idle for many years.
I have never used a threading wire and do not understand where the wire should pass through.
If it helps any, the machine is from 1945.
I plan to use the machine for medieval turned shoes in 3-4 oz leather.