Operation Check Using Pressure Gauge
- Depress the brake pedal repeatedly more than 40 times until the pedal depressing force feels heavy with the ignition switch at the "LOCK" (OFF) position to release the pressure of HBB power supply system.
- Connect a pressure gauge and a pedal depression gauge as shown in the illustration and bleed air from the pressure gauge. See Fig 1 .
- Perform operation test without booster as follows. Depress the brake pedal repeatedly more than 40 times until the pedal depressing force feels heavy with the ignition switch at the "LOCK" (OFF) position to release the pressure of HBB power supply system. Measure the relation between the brake pedal depressing force and the hydraulic pressure. See HYDRAULIC BRAKE BOOSTER PRESSURE SPECIFICATIONS table.
- Perform operation test with booster as follows. Turn the ignition switch to the "ON" position and measure the relation between the brake pedal depressing force and the hydraulic pressure after pump motor was stopped. See HYDRAULIC BRAKE BOOSTER PRESSURE SPECIFICATIONS table.
HYDRAULIC BRAKE BOOSTER PRESSURE SPECIFICATIONS
| Brake Pedal Force Lbs. (kg) | Front Brake Pressure PSI (kg/cm2 ) | Rear Brake Pressure PSI (kg/cm2 | |
|---|---|---|---|
| Without Booster | |||
| 22 (10) | 87 (6) | 0 (0) | |
| 112 (51) | 653 (46) | 0 (0) | |
| With Booster | |||
| 22 (10) | 435-580 (31-41) | 479-624 (34-44) | |
| 45 (20) | 1160-1450 (82-102) | 1160-1450 (82-102) | |
| 90 (41) | 2030-2611 (143-184) | 2030-2611 (143-184) | |
| 112 (51) | 2175-2756 (153-194) | 2175-2756 (153-194) | |