Connect another high pressure tester on the bleeder of a rear wheel brake. Bleed high pressure tester.
Operate brake pedal firmly at least 5 times. Then operate brake pedal with a pedal prop until front axle pressure tester gage shows 25 bar. Rear axle pressure tester gage must also show 25 bar. Operate pedal prop to increase front axle pressure to, for example, 40 bar. Rear axle pressure should be approx. 32 bar; also refer to diagramm.
If necessary, take the mean value of three measurements. If the measured values deviate from the specified values, replace the brake force regulator.
A = Front axle pressure B = Rear axle pressure C = Switching point