Tractor Repair: massey ferguson 165/add on hyd, massey ferguson 165, draft control

Question
my draft control wont work with aux hyd installed and i want to use three point equip is there a way to do so without removing the aux unit ithink it is #677-421 the manual tells something but i dont understand it also where can i get schemetics for repair online

Answer
I am not familiar with this model of aux. hyd.
What do the instructions say to do?
But most will bypass by turn the screw on the valve where the aux. is piped in.
You will need to turn it in to shut the flow off to the aux. and divert it to the 3pt.
Let me know what you find out and we can go from there.
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