General Information

The hydraulic modulator/master cylinder assembly controls hydraulic pressure to the front calipers and rear wheel cylinders by modulating hydraulic pressure to prevent wheel lock-up. The basic hydraulic modulator configuration consists of gear subassemblies, ball screws, nuts, pistons, and hydraulic check valves. The motor pack consists of three motors, three drive gears, and three Expansion Spring Brake's (ESB)'s.