Источник!=========== SOLVED ============!
After some procedures, I got it working again, including in cold weather (bellow 8oC).
Steps done:
1. After unmounted the seat, I found the pressure valve.
2. I released completely the pressure.
3. Did another bleed, but this time with 3/4 full syringe in one side and 1/2 in the another side (without the pressure in the Reverb).
4. After moving the fluid from one syringe to another through the tube, re-inflated the Reverb until 260 psi (recommended 250 psi).
5. Moved the fluid several times from one syringe to another, with the valve for the fluid fully opened.
6. A trick thing: Push and release several times the drop seat control. Until no more bubbles escape into the syringes.
7. First restored the Reverb screw, allowing a little bit of oil to keeping the front (control syringe) in a lower level.
8. Restored the second screw very carefully, assuring the control was in the released position.
9. Done !
Tested after 2 hours under 5oC. And still operating very well, without any change to the expected behavior.