Berthoud Racer Sprayer Hydraulic Connections

[DrWazzock]

Can anybody tell us what to do with the 3 hydraulic connections that go to the tractor?
There is a larger bore pipe which seems to raise and lower the boom. That seems straight forward enough although I did manage to lower it down and crush the mudguards.
Then there are two smaller bore pipes. What do they need from the tractor? Give us a clue. Constant flow and return? Which is return, which is flow? Tried them in a double acting spool valve and seems to tilt the boom a bit but cant get the boom to unfold once raised. I presume the electronic control box thingy sequences things on the sprayer to do the folding out, but not sure how. The instruction manual doesn't seem to mention anything about hydraulic connections or unfolding the boom at all. Presumably that comes via telepathy from the control box.

 

[A Trebor]

Different sprayer but on mine large bore pipe up and down, small bore pair you use to open/close, tilt and lock closed depending on the position of toggle switchs on control box. Small bore pipes go into double acting spool

 

[DrWazzock]

Thankyou.