High & Low Pressure Checking

1. Remove bleeder screw from one front brake caliper.
2. Connect gauge set VW 1310 or equivalent, then bleed gauges.
3. Install brake pedal depressor, between brake pedal and driver's seat.
4. Load brake pedal until gauge reads 725 psi.
5. Watch gauge for 45 seconds. Pressure must not drop more than 58 psi.
6. If pressure drops more than 58 psi, replace hydraulic modulator.
7. Load brake pedal depressor until gauge reads 87 psi.
8. Watch gauge for three minutes. Pressure must not drop more than 14.5 psi.
9. If pressure drops more than 14.5 psi, replace hydraulic modulator.