The Powermaster III Unit MUST be depressurized before performing any service operations!
- Turn the ignition to the OFF position.
- Firmly apply and release the brake pedal up to 40 times. A noticeable change in brake feel (to a hard pedal) will occur when the accumulator is completely discharged.
- Do NOT turn the ignition ON after depressurizing the system unless instructed by service procedures or until all service operations have been performed.