Hello everyone.
Jives, FrankLee is correct, it will be hard to find the needed pulleys to get your machine back to original working order. Its far more likely that you can find another Gen 4 machine for sale and get it up and running. I see Gen 2, 3, and 4 machines down here in the South all the time year round. Its harder for me to find 100 and 150 machines. Anyway, that's my recommendation, if you really want to look hard for the parts, try ebay.
Satchm0h,
First, pulling out the hub on all Emerson models will disengage the pinion with the rack on the quill. Pulling out on the hub then turning the hub, then returning the hub is how you increase and/or decrease feed retention spring tension.
This video explains the process:
Based on your post, I assume you have a "commercial" model Gen 3.5? The quill not traveling can be a few things.
1. Quill lock is not disengaging- loosen and/or remove all the quill lock screw, sleeve, and lock nut.
2. The quill take up is too tight- commercial models have a split head that can be snugged to the quill. See owners manual for how to adjust.
3. Bad or broken spring- this is the worst of all you possible causes because they do not make the spring anymore and I have never seen one of the commercial model springs sell on ebay. Another problem you may have with the spring is that it can get hung up on the three screws that secure the hub to the pinion. Those screws are long enough to protrude inside the pinion and could snag the spring.
4. Feed take up is incorrectly set. There is a eccentric bearing on the side of the head between the head and the hub, pinion, spring assembly. The eccentric bearing is adjustable and may be too tight to allow the feed to move freely.
Identifying the real issue can be difficult and I often find that a simple thorough cleaning makes everything work so much better.
BTW here is Gen 3 commercial owners manual
http://vintagemachinery.org/pubs/222/4890.pdf
And here is a Gen 3.5/ 4 (depending on year of manufacture) owners manual
http://vintagemachinery.org/pubs/222/3626.pdf
Sorry I have never been able to locate Gen 4.5 owners manual for 113.2452xx.
And for anyone not familiar, I am currently working on a series of videos detailing the rebuilding of a Craftsman Emerson Commercial Gen 4.5 drill press. These videos should cover all 4 generations of Craftsman commercial Emerson drill presses Gens 3, 3.5, 4, & 4.5.