Mf 6465 hydraulic issue

[Hesstondriver]

I’ve noticed poor hyd pressure as when tractor / oil gets warm .
It will do everything fine when cold but when warm struggles to lift / turn over plough at idle .
Today would not fold Cambridge rolls until oil cooled .
I’m assuming it’s a pump issue, and it’s not pumping the thinner oil as it is warms up .

any ideas on where to start

 

[dee]

Does it have ccls or open centre hydraulics

 

[Hesstondriver]

Does it have ccls or open centre hydraulics

im assuming open

 

[dee]

Quick check
Put a pressure gauge on a spool valve.
Heat the tractor up and see what pressure its reading idling and flat out.
Your looking for 200 bar.
If your not getting this change the pump