I had a B3300SU. I put 400 engine hours on it, then sold it for nearly-same-size but much heavier kubota
L3560.
The BIG ISSUE for me is B3300SU lateral stability. The B3300SU is the only 'B' with big wheels so it is the most laterally 'tippy' of all the "B"s. So be EXTRA prudent carrying heavy loads in the FEL bucket, otherwise the potential to roll it is there.
Fill the rear tires with liquid, to lower the tractor's center-of-gravity.
Whenever moving a heavy load in the B3300SU bucket have ample counterbalance mounted on the Three Point Hitch. Backhoe is one example of ample counterbalance.
You can power a 5' Rotary Cutter. You can pull a Disc Harrow with 18" diameter pans. You can pull a 12" X two bottom moldboard plow at full throttle, but you need a contemporary plow, sized to this "intermediate" frame tractor, such as plows sold by everytfhingattachments.com. Old plows, designed for the larger Ford 9N/2N/8N, have a main beam that is too long and collide with the B3300SU bodywork.
Small issues: The HST transmission has a high pitched whine. Using Kubota "Super UDT2" hydraulic fluid reduces the whine significantly. I always wore ear plugs operating the B3300SU.
I believe all B3300SU tractors came with hydrostatic (HST) transmission. Highly desirable, even with the whine.
No Position Control on the Three Point Hitch hydraulic lift. Instead, B3300SU has QIV, also written as 1/4" valve. Personally, I liked the QIV, especially when using my Moldboard Plow and Disc Harrow. QIV only fell short when operating a Rotary Cutter, and you work around this handily with $30 limit chains. Few B3300SU owners read how to adjust the QIV in the Operator's Manual, where QIV adjustment is clearly explained.
I did not like the factory turnbuckle Lower Link stabilizers. I had Mark Hodge at Stabilworks fabricate pinned replacements for me. I believe pinned stabilizers are now available as an option from Kubota.
T-B-N LINKS TO MY FORMER B3300SU:
http://www.tractorbynet.com/forums/...ine-root-removal-woods.html?highlight=B3300SU
http://www.tractorbynet.com/forums/...0su-zerco-check-chains.html?highlight=B3300SU
http://www.tractorbynet.com/forums/...ting-sand-pears-kubota.html?highlight=B3300SU
http://www.tractorbynet.com/forums/...0su-rollover-box-blade.html?highlight=B3300SU
http://www.tractorbynet.com/forums/...emoved-roots-using-fel.html?highlight=B3300SU