Ford 1920 3 point hitch will not lift scraper

[Genewisn]

When the hydraulic fluid is cold, the 3 point hitch will lift scraper blade. When the tractor is warmed up, the scraper will not lift. There is no external hydraulic filter. Is there an internal filter?

 

[Tx Jim]

Have you changed hyd filter lately? It's possible the 3 pt relief valve is set too low or rockshaft piston seal is leaking. How long will 3 pt stay up after engine is shut off?

 

[schiker]

Might just be low and has to drain back all so it will pump enough to lift and aerates when warmed up and can't lift it.

 

[J_J]

Put a hyd gage in the hyd system.

If you can't see good pressure, then it ain't gonna work.