Combines Still have rotor loss after hyper mods

We hyper'd our R-72 and R-60 4 years ago. Rotor loss was okay in beans but not acceptable in corn (usually 3_4 bpa). We put reversers back in and rotor loss was gone. We left all the other modifications in place. Now rotor loss is usually less than 1_4 bpa in corn and even less than that in beans. Neighbor found the same with his R-50.

By 'still' it means you had loss before. Suggest check grate level and all the basics. We have successfully limited loss to less than 1% in most every case via retarder bars in the sep grate. If not then reinstall a pair of reverse bars and keep adding them until the results are what you want. It is more of an art than a science to have R62 performance out of an R52 and maintain loss control in SOME instances. Conditions vary widely . Finally, exactly what are the losses. Measure it exactly like the manual instructs. Many years ago anything less than 2% loss was considered 'expert' by a respected independant author who made big bucks selling books. We shoot for 1% or less while increasing harvest rates over factory production.

What do you mean by retarder barsIJ Should I place reverse bars where disrupters are or remove two foward barsIJ Thanks.

I would remove two froward bars and replace with reverse bars if that is where you want to go. We use, per the hyper mods instructions, the retarding system rather than reverse bars as they seem to take less hp. The F2 rasp concave bars n71142277 or 71142276 and bolt in as many as needed into the bottom to control loss. locally we have obtained via auction a large number of old cast new cylinder bars for 6600 - 7700 deere. We cut them to length and cut the back lip off to lay nicely in the sep grate and they are prethreaded for a 3_8" bolt which when has a large diameter washer on the head makes for a quick installation as needed. When cut to about 24" one can install them through the grain bin feeder chain inspection door in about 10 minutes after one does the first one.

Thought that was what you where were talking about. We installed two F2 bars. Think I will try reverse bars. Not expecting to make a R62 out of a R52. I just don,t like to see corn that makes it in the machine thrown back on the ground. Thanks.

I agree, however in corn about All loss is noticed on the next rows to the left. If one removes the spinner and checks the loss it takes 24 kernal per foot on a 830 or 18 per foot on a 630 to equal 1 bu _ A. losses are higher on higher moisture corn however on lower moisture corn there is more powderazation or grinding to non-noticable loss. It is impossible to get to 0 loss. In our neck of the woods it is easy to see the difference in the fields of volunteer corn depending on the brand that shelled it! There is a noticable absence of 'ribbons' of corn behind the Gleaners.

Did you remove every other wire in the separator grateIJ This, with 2 reverse bars installed, is usually very effective. With corn, it takes time to separate that much grain, and it also takes open area, which you get by removing every other wire. Been very happy with 52s with this setup in beans as well.

How many reverse bars did you put back in and at what locationsIJ TIA

R-60 (P1) we kept hi-low configuration with two reversers on hi bars in seperator side. R-72 totally stock cylinder bar set-up for corn soybean machine. Four reversers, put 2 in row 3 and 2 in row 4. Removed all 8 low bars and replaced with those 4 reverser and 4 forward bars.