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