M__Gorden
Guest
If you take a handful of threshed wheat, chaff, and straw and throw it up into the air, which goes the highestIJ The wheat grains, of course. That is what I believe is the cause of walker losses in JD combines. The speed of the walkers is fast enough to throw the grain into the upper layer of straw and keep it there until the grain goes out the back. That explains why that, over the years, the walkers get longer but the walker losses persist. Once I tried slowing the walkers down, on a 20 series combine, by slowing engine rpm down to 2050. I reset the fan speed and cylinder rpm back up where they need to be. The walker loss decreased greatly to acceptable levels. I thought I solved the problem. I changed the ratio of the walker drive, so I could get the engine rpm back up to 2200. This worked well until the machine headed down hill. On a steep decline, the slower walker speed could not walk the straw out and it plugged up. Regardless, that proved to me why, with all that shaking, the grain still goes out the back! I tried all of these suggested tricks such as; Pulled concave wires (overloaded the sieves)