I have bent the springs..., everything has been cleaned and reassembled and it works!!! The pump starts working at 30 bar. Once again, many thanks for your help!!!
1) The service only said that the steering pump was working properly, I don't know what exactly they checked, although they had a description of the problem. They didn't disassemble anything.
2), 3), 4) The pressure increases automatically approximately 5 seconds after starting the engine. And...
Below is a diagram of the LS system in this machine, as you can see there are at least two orifaces affecting the LS lines, one in the priority valve (checked) and one in the steering pump. I didn't disassemble it, I just took it to the service center, where they said it works fine, but maybe...
CASE MX135 had a powershift service performed and after assembly, there was a problem with the hydraulics. The pump remains at high standby pressure (100-150bar) and adjusting the compensation does not help. The steering system works well, but the rest is not good, as if all the oil was directed...