Combines hyper mod results and questions

I did basically the same mods as you did and came up with virtually the same results. Rotor loss was unacceptable in corn and thats the only complaint that I had with these mods. last year I put one reverse bar in each section of the rotor so that you didn't have two reverse bars directly across from each other and this took care of our rotor loss in the corn, but with this setup you lose the advantage that you gained for the soybeans by having all the forward bars. This year we installed the sunnybrook generation II rotor with all forward bars and it did an excellent job in the beans and solved the rotor loss in the corn. The sunnybrook rotor was the missing piece to the puzzle for us. Our 72 is one smooth machine now with that solid rotor, you don't have the vibration problems like the oem rotor.

I really do not want to buy another rotor for all my combines since we trade every couple of years. I had 8 low bars in all in sep side. 2 high bars then next row two low bars and so on. Maybe I should have just but the low bars where the original four reverse bars were from stock. I would think though that 8 low bars would slow the material down more and lower rotor loss. I did not mention above that corn loss seemed more variable with mod setup. Sometimes more.

I tried that too but it was still to hard to keep the corn in the combine. The only way I stopped it with the oem rotor was to run the four reverse bars across the length of the rotor and then I tightened the seperator grate a couple of notches. The half height just didn't get it done for us in the corn. We are trading this winter and we just worked it out with our dealer to get the sunnybrook in the combine, I just told him how I would like the machine setup and he is taking care of it. It shouldn't cost any more since the oem rotor is higer priced than the sunnybrook. I just know after working with these mods for three seasons now that its kinda tricky to keep the rotor loss low in the corn.

We've had the Hyper mods. for 3 seasons. We typically run 13-15 kernals rotor loss in corn and as close to 0 as you can get in soybeans. We tried replacing low bars with as many as four of them dn$% reversers but found it didn't help much. Those losses are in line with any stock machine we've ever had. Our goal for corn however is to get to 6-8 kernals. That would be 1_4 bushell or so. I think it is attainable. So far we've loved the mods and see no reason to change. Brian

I did my modification a little different and have had good results. I ran all forward bars, I replaced reverse bars with some bars that had a lot of wear on them. I extended two rows clear to the end of cylinder. I was still having some rotor loss in corn so I lowered the seperator grate 1_2 inch. This cleaned up the loss and didn't hurt my bean flow at all. Unfortunantly we lossed our wheat crop this year so I didn't get to try it out in wheat. Kurt

Are you running any f rasp barsIJ How manyIJ How many low bars are you usingIJ

turbo: I have run corn and beans both this fall with partial hyper done, and was quite satisfied on R-72('97). I did not take out the vertical thresher divider out, and I think that the loss in corn may be because ears may not spend any time on the concave on the left side, and zip to the seperator befor shelling. This make any senseIJ I had little loss, but had low bu_hr because of down corn. But running fuller may result in less loss. I only ran 250 rpm. I have no reverse bars, and have 4 total low bars.

Instead of using F2 bars we have two flat irons at the 6 and 4 o'clock posistions. These flat irons run the length of the sep grate. They are set on the rods of the grate. I believe they are 9_16 inches high...I think they stick over the cross bars less than 1_4". We went with this set-up vs. the F2 bars because we didn't want to attach anything on top of the cross bars in order reduce the chance of them coming loose and raising heck in the cylinder. Hyper suggests cutting every other cross bar and sliding two together. Then there is enough room for F2 bar to fit on rods. Our R-72 is a '94 so sep grate is not adjustable. We did however remove every other wire from grate. We have 8 low bars installed. We run cylinder 180-200 rpms.

Yes I wondred about that very thing happening (material sliding off Concave before getting thrashed. I would like other opions on this possible problem. Did you extend cylinder bars and helical bars into discharge areaIJ

turbo: Yes, I have the lowen Kit extended bars, and have only 4 low bars on the seperator(side by side and I put lowest set in third section and less low in fourth). I have possibly 4 things left to do. (1)Put 3rd extended helical into discharge, (2)Put helical over left side of feed throat, (3)Put a higher bar or F2 bar in seperator grate, (4)MAYBE remove thresher guide at left of concave. I hear of some extremely low cyl. speeds with a totally hyperized machine, and mine rumbles some below 240 or so, so I may go for it and do it all. In beans, I leave the feeder fairing tin on on the left side, but remove the right one. And in corn, with the Gehringhoff head, I had the option of having the cross auger flighting "meet" anywhere in front of the feeder house, so I have them centering 35% of the way from the right. This is important, as the first year with the head, it fed in closer to the left side and was awful! Pulled terribly hard, and hard on grain quality. The Gleaner heads, in order to fit the 42_52 machines, I believe do not feed the big machines where they really should be fed! This all indirectly relates to the threshing guide removal and thought should be noted. Sorry this got long.