Pressure Regulator
- With Pressure Tester Adapter and Pressure Tester (32 4 000 and 34 3 160) attached to pressure regulator, start engine. Pressure should continue rising to upper switching pressure.
- Operate brake pedal with engine running to drop reservoir pressure (pressure meter reading) to lower switching pressure. Afterward pressure regulator will switch to charging reservoir (pressure rises again).
- Replace pressure regulator if test value does not conform to specifications. Drop reservoir pressure (pressure meter reading) to "0" by operating brake pedal about 20 times. Remove pressure meter and check fluid level in supply tank.