I ran into problems fitting a B2660 blower on my B2410 tractor. It is listed as compatable and bolted on just fine. The problem came with the length of the center driveshaft. Only one shaft is used on many different sizes of tractors. The driveshaft has a slip joint to allow shortening/lengthening the shaft (as most all pto shafts do). With the exact same shaft mounted on my B7100 HST shorter tractor) with a B2650 blower it worked fine. When I used the mid Pto shaft on my B2410 it needed to be pulled apart much farther (longer tractor). The drive shaft developed a whip in the center and the vibration was terrible. I had about 8" of overlap between the front and rear sections so that was not the problem. Figured that the used shaft must be bent or worn at the slip before I got it so I bit the bullet and ordered a new PTO shaft from Kubota. Almost $400.00 later the new shaft vibrated as bad as the old shaft. I was bummed. Checked with Kubota to be sure they sent the correct part. They assured me that the shaft was fine and something must be bent on my tractor or blower. I put dial indicators on the PTO of the tractor it ran true. I checked the center jackshaft part of the blower it ran true.
I ended up taking the brand new shaft to a driveline shop. They lengthened the female part of the shaft so the slip was near the end of the shaft, not in the center, then balanced the shaft. So now with another $300 added to the cost it works great.
Moral to the story if a B7510 is longer than a B2410 I think you will have problems worse than I did with vibration in the driveline.
If you look at the design of the new front mount blower pto shafts they no longer have the slip joint that allows the shaft to be lengthened/shortened, they are one piece fixed length.
