Brakes 407 Basic brake system 408 Hydraulic principles 408 Brake hydraulic systems 410 Master cylinders 410 Compensatingtype master cylinder 413 Centrevalve master cylinder 414 Valves in the hydraulic system 416 Wheel cylinders 418 Hydraulic brake fluid 420 Brake booster 420 Drumbrake assemblies 423 Brakeshoe assemblies 424 Discbrake assemblies 426 Parking brakes 430 Technical terms 432 Review questions 432