The first problem I would try to fix would be to shut off the returns auger so that no popcorn has the opportunity to be rethreshed. This can be done by sliding the cover for the returns auger over its opening (access via sieve area...might even try taking bottom sieve out for popcorn). Secondly, I would check to see if the concaves are parallel. As with any conventional combine: Deere, Cat, New Holland, the owners manual details the annual owner's inspection and adjustment procedures to ensure parallel concaves and linkage. If one side of the concave is riding higher than the other, especially the right hand side without the position sensor, you might be running too tight and causing some potential damage. The disawning plates should be open at all times in corn. Cleaning fan should be running 1400-1500 RPM. Theshing cylinder below 225 RPM and concave gap dependent on the size of ear_cob combo. The lexions are known for grain quality. And always remember to run the machine full! I don't know howm many times I have had to impress upon an operator that if the machine isn't running full at all times with only a third or less auger trough of returns, the combine will do a less than avg. job, both quality and loss! Combines are so dependent upon running at 90% of the engine in ideal conditions to ensure a full machine or else. A slight increase in ground speed can mean all the difference in premium, loss, etc. Operating a combine in a conservative manner will not achieve its greates opportunity for its return on inventment! Try some of those settings and adjustments, too bad you have to wait until this fall. I think I would spend more time consulting with the dealer, no matter the situation, than barking on here. Too many repeat posters on here to make much of a difference, they just like to complain rather than resolve.
