kubota kx161-3

I have a Kubota KX161-3 Mini Excavator...When I lower the blade to stabilize the machine it will pick the machine up..I let go of the blade handle and the blade releases and cant hold the machine stabile..Push the handle to lower it again and blade lifts machine..let go of handle and machine...

Hello All, I tried search the forum(entire Internet) for this solution, couldn't find it and Im not prepared to spend the cash for a service manual until I have a more serious problem... and some cash. I was hoping someone here could point me in the right direction before I spent the money or...

Anyone able to give me accurate NEW pricing on these two models? I know there are lots of variables and options, but . . . . Let's figure ROP (no cab), rubber tracks (not steel), and angle blade.