Buying Advice Need input on older Tier II or Tier III low profile/ orchard tractor.

[poppaw2]

I currently use a Kubota M6800 to run speed (air) sprayer in my pecan orchard. The tractor will approach hot when using the A/C in our 100 degree heat -- I try to spray only at night but because of weather or pesticide timing, sometimes have to spray during the day as well. Would appreciate any suggestions as to replacement in the 75 to 90 pto hp range. Will need to replace current sprayer with 75 pto hp model this summer, which will add to overheating the M6800. I do not want a Tier IV, looking for 2002 through 2012 year model.

This is first post, so redirect me if I am in wrong forum--Thanks!