Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSMAZDA1999626 ES, 2.5 D, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 360 (CONVENTIONAL BRAKE SYSTEM)POWER BRAKE UNIT INSPECTIONPOWER BRAKE UNIT FUNCTION CHECK (INSPECTION USING THE TESTERS)CHECKING FOR HYDRAULIC PRESSURE
1999 Mazda 626 ES, 2.5 D, Standard
Checking for hydraulic pressure
1999 Mazda 626 ES, 2.5 D, StandardSECTION Checking for hydraulic pressure
WARNING: This page is about a different car, the 2005 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
- When the engine is stopped (vacuum 0 kPa {0 mmHg, 0 inHg}
) and the fluid pressure is within the specification, the unit is operating.FLUID PRESSURE SPECIFICATION
Pedal force Fluid pressure 200 N {20 kgf, 44 Ibf} 590 kPa {6.02 kgf/cm2 , 85.6 psi} min. - Start the engine. Depress the brake pedal when the vacuum reaches 66.7 kPa {500 mmHg, 19.7 inHg}
.
- If the fluid pressure is within the specification, the unit is operating.
- If the fluid pressure is not as specified, inspect for damage to the check valve or vacuum hose, and fluid leakage of the hydraulic line. Repair as necessary, and inspect again.FLUID PRESSURE SPECIFICATION
Pedal force Fluid pressure 200 N {20 kgf, 44 Ibf} 8,780 kPa {89.53 kgf/cm2 , 1,273 psi} min.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.