Just did mine to the 2110 I bought beginning of the summer. Thankfully for this site as I read everything to look for. And mine was same as yours not a blade left on it. As said about removing the four screws from the old was the hardest part.
Once they where removed, cut the new fan in half. Making sure to have two screw holes on each half. Fit over coller on the shaft and tighten each half at a time. The second half is vary helpful to have a long wobble extention for your socket. As stated above I believe the fan cost was 30 bucks from mother deere in town. Way less expensive then a failure on your hydrostatic transmission.
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