Try pushing lever hard to the right. Some Kubotas require pushing through the detent to get movement. It seems weird pushing the lever so hard to the right at first.
That lever seems to go only up/down, and bucket moved reeeeeaaaaal slow To the right) when it did. Lever is not same as for front bucket. Are we talking about the same thing? Can post picture in AM.
You are using the joystick to operate your front plow correct? It should move up/down and left/right, this is normally how front plows are controlled. If this is not correct then please give us more details on your particular setup, the devil is always in the details...and your question doesn't give many.
What moship is referring to is called "regen" or the regenerative function of the FEL valve (joystick). A search of the tern "regen" will turn up hours of reading.
I was thinking you were using the conventional joy-stick used for front end loaders abd the FEL was replaced with a blade. Many first time users of snow blowrs with hydraulic rotation or angle blade users don't realize the joy stick had to be pushed much further to the right past a somewhat stiff detent.
You might want to verify the hose routing and reconnect all hydraulic fittings to just to make certain.
It might help if you described what plow/brand/model/etc...
Not trying to be a smart***, but check your hydraulic couplings. My plow quit moving one direction a few weeks ago as well. Turns out one of the quick disconnect for the hydraulics wasn't seated all the way when I hooked up the plow, it worked for a while then suddenly popped out. The connectors were still partially engaged, so the problem wasn't very visible since the hose wasn't just hanging there.
Your situation can happen if the hydraulic lines are cross plumbed. It turns one way because cylinders have more push than pull because the area of the rod doesn't contribute to force generation. If these are two single cylinders mechanically connected to act as a single, double acting cylinder, you are applying pressure to both sides instead of a pressure and return connection.
The FEL doesn't move left/right, hence additional controls. The plow is connected via quickattach and 2 additional hoses. Will check connections and brand in the morning. Picture of additional controls.
While I will don't know which way is open for the valve (despite the instructions), I played with all settings
Kubota B8200, then a Kubota L3130 HST, now a Kubota L3400 HST
Komrade, the ball valve in your photo doesn't look like something rated for hydraulic pressure use! If you can post a photo of you plow's cylinder(s) and the lines, someone may be able to help more. I have a single cylinder, and my plow (also a SSQA snow blade) will turn both ways even when engaged with a push pile of heavy snow.