8520
Guest
I know that almost all 8010 series tractors have the plastic water pump impeller fail, older and newer engine have the steel impeller. Never seen one hurt the cover, because when it comes loose, it overheats instantly, and you really cant run it for long without more severe damage. so in those combines i would say that any model year 99-2001 would probably have that bad water pump. In the 8410's they go out normally around 2000 hours