If manometers working correctly, pressure over 10 kPa in pneumatic system it's to high, usually it's not over 8-9 kPa, u need to check pressure switch.
Super video. You are a genius my friend. I enjoyed this country ride. The sound of the thyristor regulator and raba axles is music to my ears. Are you using both traction motors? Good luck getting all working parts you need. It can be a challenge.