YEP!
Been there done that! Tearing up my fan blade, that is.
The dealer cut me some slack on the labor. This is a real engineering disaster on that model of tractor (really a Yanmar with green paint). I started making a home-made guard out of aluminum that I saw somewhere, but would buy a guard for the entire underneath, if everything attachments, John Deere, or someone had them available. Both the fan and hydraulic filters are in the worst possible place for doing brush-hogging. Now, I use a 9-inch diameter Stihl scratcher blade on an old Green Machine clearing saw, ratchet-loppers and chain saw to "clear" the big stuff before I run the brush hog or mower through. For brushing verses weed cutting, I generally back into what I want to cut to try to protect the vulnerable "achilles heel" underneath. For larger, tougher brush like the Hawthorns up here in the Turtle Mountains, the rotary cutter leaves jagged staubs whereas the clearing saw makes nice clean cuts flush with the ground. However, I only have to brush the trail once if I use herbicide on the staubs or spray what grows back, leaving grass to cut intead of brush and weeds.
I am going to print yur instructions and place in my owners manual. Your description is better than in the CD-ROM reapir manual.
SC