Posted 7/9/2011 15:19 (#1855492 - in reply to #1855399) Subject: Re: What is the difference in a 1688, over a 1680 combine?
Huntley Montana
1680 with a Cummin's ran 27-2800 rpm. the 1688 ran 2400 rpm. Squirrel cage fan started in the 88's. Late (after mid 90) 1680's had the same seive & shoe as the 7088 does today.