MF 240/135 Steering Issue

Massey240

New User
Power steering stopped working but had plenty of oil. Thought it was a blocked filter so rebuilt the pump. New cylinders were leaking with air bubbles so pump appears to be working. Leaking fixed.
Adjusted turnbuckle on valve as per manual. Steering works but still no steering assist (not hydrostatic p/s).
Checked oil in steering box, low. Filled, still not difference.
The odd thing is that there should be several turns of free play to the right, on the steering wheel once the turnbuckle is disconnected but there is barely half a turn in either direction even with front of tractor lifted up on FEL.
This makes me think that maybe there is a partial jam in the steering column where the ball ball bearings sit?
Running out of ideas....please help!
 
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