I have a 2003 B7500HSD with the RCK60-24B MMM. I have been mowing 2.5 A of lawn plus 8A of pasture for 7 years. The only times that it has run hot was when the grass clippings, leaves, fuzz, etc. has blinded off the radiator, radiator prescreen, shutter plate, or the grill screen. I watch the...