Hello, I am having some trouble with my Unimog's brake system. I believe that changing my air bath cleaner fluid may have caused something to get dislodged somewhere in the air line.

The issue: My brakes no longer function. The reservoir tank pressure holds at around 7 while pressing the pedal only brings the pressure to 1. Sometimes repeated pressing or pressing at the correct angle will get it up to 2 and rarely multiple pumps will bring it to 4.

Before issue: The air pressure gague never functioned and both pins hovered around 8. I believe the new air bath fluid detergents loosened something.

What should I do? It is litterally frigntening to drive it with solely the emergency brake.