We currently run large wire concaves with cover plates in wheat. I think the condition (wear) of the concaves is more important than the style. I think you will be fine with 3 cover plates if your bars are not worn too bad.
Have run large wire Harvest concaves with three cover plates in hard threshing spring wheat for 12 years. always did an decent job with a very few white caps with the old std rotor with worn bars. last season we switched to a spec rotor with a fresh set of Gorden bars on the front few positions , Sample is now perfect. No way would I change concaves 2-3 times per year when this works so well.
Yes, I agree. We never change concaves now that we have hard-faced large wire's from St. John Welding. We have had good luck with the Std rotor, the Specialty, and the St. John rasp bar rotor. Pairing up the cover plates with fresh large wire's is a pretty universal combination.
We like cover plates on the first concave then a small wire concave then a large wire with All wires in but maybee 3 cover plates would do the trick It would probaly be best to have the wires in every hole ,thats a bigger pain than changing the concave. good luck.
We have had good results with Gorden helical concaves with one cover plate in front for wheat and beans. We also feel it is too troublesome to change concaves for small grain. We used to, but no more. dmorgan@sit-co.net
The condition of the leading edge of the concave bars is the most important thing in thrashing. The leading edge is the only thing that will restrict the flow and cause the material to rub on material. The rounder or lower the leading edge, the worse the thrash. With cover plates on in the first three sections of the concave the material will stay in the trashing area longer. This should be done over the first half of the concave area. On the back three sections you should remove every other wire on large wire concaves and leave one and remove two on small wire concaves. By the way I'm Back. My e-mail address (estesmfg@hotmail.com) E-mail me and leave a number and I call you. The Disrupter guy.