I just bought a 34-570 saw at a yard sale and found this site to order parts. I did not order the parts yet because I could not find one of the parts on the diagram. For some reason the 34-570 is listed under the Delta category.
Let me know if you are able to find your part.
On my saw the blade height adjusting mech. is incomplete. There is a long threaded bolt turned by a wheel and the nut that the bolt goes thru and sits inside a bracket attached to the motor is missing. I think that is what is missing provided it is similar to the tilt adjusting set-up which is intact.