Proportioning Valve
- Remove the proportioning valve from the master cylinder. See Fig 1 .
- Connect two pressure gauges; one to the input side, and one to the output side.NOTE: Be sure to bleed the system after connecting the pressure gauges.
- With the brakes applied, measure the input pressure and the output pressure. If the measured pressures are within the specified range, the proportioning valve is good. See Fig 2 .
- Reconnect the brake lines in their original positions and bleed the system.