</font><font color="blue" class="small">(
What does "the scv valve is on the tractor now and it is a 4 way valve to work a blower or blade" mean to me. Not being rude, just don't know what that is. If anyone could explain, it may be important to me, I just don't know.
)</font>
This is the hydraulic valve that operates the front mounted implements such as the loader. The joystick contoller that you use to move the loader up down etc. contols this valve. The older Kubota BX 2230 came standard with a three valve setup that was attached to the loader. When you diconected the loader from the tractor, the contoller stayed with the loader. The three hydraulic valves are sufficient for the loader, but certain attachments such as snowblowers require a 4 valve setup. The BX 2330 has/had an optional 4 valve system that would work attachments that require the 4 valve arrangement. When you remove the loader, this valve and contoller stay with the tractor so you can hook up the snowblower or blade to work by the Joystick contoller.
The John Deere 2305 and Kubota 2350 come standard with a 4 valve system.
Most people prefer the 4 valve system. Some like the fact that the contoller leaves the tractor on a 3 valve system when dropping the loader thus making entering and exiting the tractor on the right hand side easier.
If you ever plano on getting an attachment that requires 4 valves such as a snowblower, make sure the tractor you get has 4 valves.