NDDan quote:[I think you would have to be quite a monkey to get front cover off blower and then the cap that will hold the crud with blower still installed.] I had a good laugh when I read that. I believe that you are right about that, although there have been times when I felt like a monkey crawling into various places on machine, and especially when one thinks he can knock some time off a particular job. I am intending on cleaning main oil cooler but just leaving it intact. Sounds like a good idea to simply remove from engine in order to give a more thorough cleaning. NDDan, you mention of the thermostat under cooler with plastic nipple possibly causing oil to bypass cooler. I definitely think you are on to somehting here, for we have never replaced thermostats on either machine. Is this a fairly easy jobIJ NDDan quote:[Average life of blades in our area is 1500 hours. Some way more and some less.] I previously stated a fan life of 600-800 hours, but on other intervals the fans in both combines lasted around 1100-1200 hrs. You are right about the machine running with others. For these first 2 R-70's were bought new from local dealer. Then as farm grew 2 more R-62's were added for total of 4 machines running togehter. {Now R-70's are running seperately, with one 89' R-70 having 2993 hrs. and other 91' R-70 3200hrs.} That was always the rule of thumb with all the operators to stay out of the other machines dirt. Whether it be milo or wheat, cooling capacity would stay sufficient all season long. NDDan, Thank you for sharing your knowledge on this subject.