WE have pulled every other wire out the concaves on our 2388, rotor is an AFX with 8 straight bars, and we have had the vanes in the middle & retard positins & still are having trouble with rotor loss as well as had problems with concave plugging in fields that had a fungicide sprayed on them.
CIH service manager was at a loss as what to do. I posted a similiar question on another forum & had a couple suggest the round bar concaves. Also got an e-mail from a friend that is a test engineer with CIH who recomended the round bars as well. After contacing CIH & sveral other dealers service manager is now recomending the round bar concaves as well.
Looks like the round bars are about $1,000 each. Hate to spend that much money on the machine after all we have already spent on it but with about 1,200 acres of corn still to shell if they save 1 bpa they will easily pay for themselves this year.