I have a farm pro 2420. When its cold or just started up it steers ok, but the longer you run it ,like 1 hour it want steer at all.

[Eddie Crawford]

I have a farm pro 2420. When cold it steers ok but after an hour it doesn't work at all. Wheel just spin

 

[Leejohn]

What hyd oil are you using and how old is it?

 

[dodge man]

If the other hydraulics are working ok I’d say the seals in your steering cylinder need replaced. I know nothing about your tractor so that’s a guess on my part.