Hi, On my 35/45 there are shims (spacer washers) when you take the steering column off of the steering box.
If you add a shim it tightens the steering. If you were to take a shim out you would loosen the steering ie. you would be able to turn the wheel a bit before it turned the steering.
I couldn't get a shim locally so I cut one out a piece of gasket paper, it worked fine.
This is an old tractor ,I wouldn't know if it's the same system as yours though.