Well, Ham, I'll give you a short history lesson on the early 2100 series unloaders. Originally, where the horizontal auger was split actually had the hex shaft welded into the auger flighting closest to the combine unloader elbow, and had a 3-5" hex shaft sticking out of the flighting that stuck into a female set of splines on the outer flighting. Case determined that due to the welding process, the hex shaft was becoming crystallized, causing the shaft to break in much the same manner as you described. This was changed to the current setup, both flightings have a female hex that a 6"-8" free-floating hex shaft fits into(I would imagine this is what you have now). One other thought to this problem was the very rapid engagement of the unloader, especially with guys who did not fully unload their unloaders before they shut them off. It was thought that this created a shock load at the hex shaft that contributed to the problem mentioned above. So, when early 2300 series were being produced, Case came out with this orifice fitting(pn 327679A1) to slow down the engagement momentarily. Where does it fitIJ look at your unloader engagement cylinder. You will see a fitting between the hose and cylinder on both hoses. Remove the fitting from the top hose and install the orifice fitting in its place. If you are quick, you will not lose much oil in the process. Good luck!
