Procedure for bleeding
1st. Step: Bleed brakes in the normal way (in combination with bleeding device at the brake fluid reservoir and 2.0 bar pressure) (primary circuit).
2nd. Step: In addition, use the Piwis Tester to bleed the brakes (secondary circuit). Only necessary if the hydraulic unit has been replaced and, after bleeding in the normal way (primary circuit), the brake pedal travel is excessive.