Just started wheat with an 8010 with the lower shoe air dam (factory installed on sn HAJ202003 and after).Instead of the normal 1000+ fan rpm, we have been at 670 to 720. The fm has been below .5% in 80+ bu. wheat. Has anyone else seen similar results ?
The air loss under the cleaning sieve has been an issue with the Self Leveling shoe from the start in NH and CIH combines, but it's not the main problem with the air flow. Go to www.newhollandrochester.com and you'll see information on the Air Flow Control that seals up the self-leveling shoe. The seal on the lower sieve was part of this kit three years ago. Reduced fan speeds in wheat in the range you suggest have been seen with the Air Flow Control kit installed. The main benefit, however, is stabilizing the shoe performance and making it more forgiving in changing crop conditions/yields.