Massey 230, rear diff lock?

[davedj1]

I am borrowing my bil's Massey 230, I got into some mud today and searched for the lever to push for locking the rear differential, I didn't find one!
Do these have that feature?
I don't have a lot of experience with tractors and I assumed they all have it.
Thanks,
Dave

Disregard, I just found the answer, I guess it doesn't have one
Oh well, it does OK without it I guess.

 

[WilliamTO-35]

If you have separate foot pedals for the right and the left rear brakes, you can use them to transfer power from the slipping tire to the other tire.