Hello together, I hope you can help me. I’m getting my DT125 back in shape after 6 years and now I have the following problem. If I have assembled everything correctly at the brake, fill in brake fluid Dot 4 and start pumping the liquid in the container will simply not less. The brake pump does not pump. I then disassembled it and also saw that it was no longer top in shot. So bought a used new one and tested it again before assembly. T. Liquid in and pumped. Nothing came up. Then this one also disassembled, everything looked good. Reassembled and assembled. At first came when pumping bubbles, but brake fluid didn’t come out. What could that be? I’m really stunned. Pumping does the new one. You heard it even before brake fluid was in there.