1. Have an assistant depress the brake pedal with a 98 N (10 kgf, 22 lbf) and 294 N (30 kgf, 66 lbf) of pressure measuring with a commercially available pressure gauge (A). The following pressures should be observed at the pressure gauges in each vacuum.
   Vacuum booster vacuum kPa (mmHg, in.Hg) | Brake pedal pressure N (kgf, lbf) | Master cylinder oil pressure kPa (kgf/cm 2 , psi)
   0 (0, 0) | 98 (10, 22) | 0 (0, 0)
   294 (30, 66) | 545 (5.6, 79)
   66.7 (500, 19.7) | 98 (10, 22) | 5,015 (51.1, 727)
   294 (30, 66) | 9,570 (97.6, 1,388)
Inspect the master cylinder for leaks if the readings do not fall within the limits shown above. |