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.
Brake Circuits
There are 2 hydraulic brake circuits: the hydrostatic circuit (master cylinder pressure) and the power circuit (hydraulic pump pressure). See Figure . The hydrostatic circuit includes the front calipers, servo cylinders and the master cylinder. The front calipers are activated by hydraulic pressure from the servo cylinders compromising a combination of master cylinder pressure and direct hydraulic pressure. The power circuit includes the rear calipers, servo cylinder and the power valve. The rear calipers are activated by hydraulic pressure supplied directly from the power valve.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.