Well,
it was the sideshift joystick.
Since I don't have any diagnostic tool I used description of faults.
I have checked all inputs were a fault turns off the hydraulics.
The sideshift joystick was a little off with his voltage when in neutral upon key on. I have turned the potentiometer on his shaft until he was showing 7.1 V in neutral. After the next key on the hydraulics turned on.
Now, all hydraulics work except the sideshift which turns off when I push the joystick fully to the right. I've checked the voltage and it doesn't go out of range.
What do you think?
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