John deere 2020 hydraulics

I have a 1971 2020 John Deere with a 145 loader and i was tedding hay and I lost loader hydraulics, power steering, and 3point function. Brakes still work and independent pto still work. I changed the filter and cleaned the screen changed oil. No significant material in filter or screen. Any ideas why I would loose these functions is greatly appreciated.
 

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