Grossgary -
I think Biffo has a different mower with a much different mounting system. My original
B7100 mower, Model MR6000 used that mounting. I think they called it parallel linkage. I don't know the number of Biffo's mower, but the later
B7100's had a RC60-71B, I believe. His mower appears to be a model they offered in between the MR6000 and the RC60-71B. I put the RC60-B on mine even though it was made for a later model tractor, I think a
B2400 if I recall correctly. It was not too difficult to mount. The biggest problem was fabricating the rear mounting brackets. The front hanger bracket pretty much bolted on with only a few modifications.
The older parallel linkage mounting had a tendency to wear a lot. With it the mower was actually pushed by the parallel linkage, whereas the mower is pulled along from the front mounting bracket on the newer mowers. What I miss most from the old MR6000 was the height adjustment lever. It was much more convenient than adjusting each wheel separately as on the newer models. The newer mower cuts better also.
I also put a separate cylinder on mine to raise the mower independently from the 3 pt. hitch. I just turn the valve under the seat to operate either the mower lift or the 3 point. I had a 3 pt. grass catcher on mine, and that was the only way I could raise and lower the mower without the hitch going up and down.
I have since transferred the catcher to my John Deere. On it I took the lift arm off and replaced them with chains. That way the 3 pt. hitch arms hang from the chains and do not go up and down with the mower. I don't use the 3 pt. for anything else on the John Deere.
Here is a photo of the MR6000, but I can't get it to come through very good.
