Originally Posted by
Zsteve
these early Advance lathes have the longitudinal feed driven by the handwheel at the end of the lead screw (which you have probably worked out) just need to practice on carefully feeding it along. The later production lathes had half nuts, but this one looks like it just has a full nut thats in constant engagement.
the dog clutch is used if you want power feed or if you want to cut a thread, and shouldn't be too hard to make parts to get it working. I think by memory that the Myford ML7 change gears work on these lathes, and the Lathes.uk site has some good info on them.
The lead screw on mine when I had it was in good condition, for yours possibly you might be able to remove turn it around and remount if the wear is a problem, but I'd maybe make a new nut and see how much backlash is there still. Though backlash is not really that big a deal, its just something you work with if its there and generally its not a problem.