Relieving System Pressure
Remove bleeder cap from maintenance bleeder on modulator. See Fig 1 . Attach wrench to maintenance bleeder. Connect a rubber tube of appropriate diameter to maintenance bleeder, and place other end in a suitable container. Hold rubber tube, and slowly loosen maintenance bleeder 1/8 - 1/4 turn to drain brake fluid from modulator. After fluid stops flowing, loosen bleeder further to relieve pressure completely.