Unit, Brake Operating: Description
The brake operating unit (BOU) is a master cylinder equipped with a pedal feel simulator (PFS) and a pedal travel sensor. The BOU is mounted in the same position as a conventional master cylinder. The brake removable reservoir is coupled to the top of the unit. The unit incorporates an accumulator, brake line fittings and bleeder screws.
| 1. Fluid Reservoir Attaching Ports | 2. Boost Chamber Inlet Bleeder Screw Boost Piston |
| 3. Regenerative Brake Controller (RBC) Supply Port | 4. Brake Operating Unit (BOU) |
| 5. Pedal Travel Sensor (PTS) | 6. Pedal Feel Sensor (PFS) High Pressure Chamber Bleeder Screw, PFS Front side |
| 7. Pedal Feel Sensor (PFS) Low Pressure Chamber Bleeder Screw #1, PFS Back side | 8. Actuator Chamber Outlet Port |
| 9. Boost Chamber Inlet Bleeder Screw #3 Boost Piston | 10. Boost Chamber Inlet Port |
| 11. Supply lines to the Anti-lock Brake Module (ABM) | 12. (Not shown) Bleeder Screw #2 |
NOTE:
Bleeder screw #2 is located on the opposite side of the unit directly across from the Pedal Feel Sensor (PFS) High Pressure Chamber Bleeder Screw, PFS Front side.