Pick a make and model. Full spec sheet, owner videos, and similar tractors on one page.
Find a model →Pit up to four models against each other. Engine, hydraulics, hitch, weight, warranty.
Open comparison →Written guides on choosing tractors, hydraulics, PTO, hitches, and maintenance.
Read articles →This is a hands-on shop repair of the Vari-Cool variable-speed fan drive on a John Deere 8310R, not a buyer's overview. A technician pulls the driven and drive shiv assemblies apart on the bench, inspects bushings, seals, splines and bearings, replaces the boot and belt, repacks grease, and reassembles with torque specs, then runs the fan to demonstrate operation. Useful for owners or techs troubleshooting grease leaks or fan-speed issues, not for shopping or specs.
Posted by ZK MasterTech, a working John Deere technician's channel focused on technical repair content rather than sales or reviews.