Combines Setting R52 for cornIJ

lloyd, Hopefully all 3_4" wide spaced cylinder barsIJOpen the concave with the rachet to a n8 setting.Make sure you have the front of the concave set at one mark below "Mid" torwards "Max".This should give you a 1" setting between cylinder bar and first bar of concave.Double check to make sure this measurement is correct,sometimes concave doesn't get set properely in pre-delivery.Now check the distance at the rear of the concave. It should also be at 1" clearance. If it isn't,drop rear of concave by removing pins in clevis' and adjusting to acheive 1" clearance. Now rachet concave open to a 10-12 setting and try your rotor speeds again.Depending on yield,how dry corn is,if cobs are spongy or dry will determine rotor speed.Remember,we are trying to roll the cob through.This is not acheivable with a factory 1_2" wedge in concave when set according manual. let us know how everything works. Hyper Harvest II

Ihave found that running at 300rpm and set concave at 12 works the best. Have trouble though with white cob corn, must be soft cobs, but if your seives are set properly so air movement is maximum they won't bother that much.

Couple things you can try. Some I learned by trial and error and some from the guys with Gleaner at the farm shows this year. Verify rear concave clearance as Hyper mentioned is 1" or slightly less than the diameter of an average shelled cob. We have taken wedge out of concave and have exaggerated the wedge in some cases. This year we have had good luck with having front concave open to about 1.4" which is about right in between Mid and Max on your front concave scales. This can also help reduce kernel crackage if any is present and can allow you to run higher rotor speeds, which will also in many cases reduce cob breakage. Try concave settings above and rotor speed of 350-380 rpm. Faster speeds mean you'll have less chance of cobs bumping into one another and breaking as they will have more space. This also tends to take less hp than running slower rotor speeds. If you're not already, try running feed chains in fast speed position to give more uniform and less dense feed into rotor. Another alternative, and this is a trick I learned this year from the Gleaner guys, is to run the front (and possibly rear but try just adjusting front first) feed chain drum stop blocks in the Grain positions. I know this goes against everything we know about the R52 and feeding performance, but this setting can help force the ears to enter the rotor in a flat orientation so they can better roll through the concave. Good luck.

Hmmmm, we've been running our feeder drums in the grain position for all crops all along - at least since we went to the R52 with shock absorbers. I was under the impression that's where we were supposed to run them in corn and the shocks would maintain drum level to crop inflow. Tom langan

We ran two R62's set the same but one had steep pitch helicals and the other std. The std. would put cob in the bin, the steep pitch would not have any cob. Variety of corn does make a difference with the std. helicals.

Adjusted combine ran from 8 to 10 on rotor and 250 to 350 on speed didnt seem to help much. Half half in. bars except where extended to chopper those are three fourths, Going to keep fiddling with it as harvest winds down 200 acres to go. Thanks for ideas. lloyd

Adjusted combine ran from 8 to 10 on rotor and 250 to 350 on speed didnt seem to help much. Half half in. bars except where extended to chopper those are three fourths, Going to keep fiddling with it as harvest winds down 200 acres to go. Thanks for ideas. lloyd