ozark, I used to sell OTC back in the day (late 70s to early 00s). That press was designed for pressing bearings on and off of shafts, such as axles. Can't remember the model number right now but I can get the information Monday. Might even have a parts breakdown. Very nice unit. OTC discontinued it when they came out with the 1825 open throat press. The blue Y35 part puzzles me, as I don't believe that is a component of that press, could be mistaken though, it's been a long time. Commercially it was sold with or without a floor stand. I believe all of the Southwest batwing trucks and trailers have these, except mine, it was gone when I purchased it. If you have the TM for the 944, SGPRSMD or the SGPRSM, it will be in there. The 17.5 ton (4120) "power twin" ram mounts upside down on the upper bolster. Looks like you may be missing some parts. If you're interested in selling it, I may be interested.