TM 9-2320-209-20-3-2 1. Using 7/16-inch wrench, unscrew bleeding screw (1) 3/4 turn. Look for air bubbles in hydraulic fluid in container (2). 2. When there are no air bubbles for five seconds, use 7/16-inch wrench to close bleeding screw (1). Make sure that bleeding screw (1) is screwed on tightly. 3. Take bleeding hose off bleeding screw (1) and out of container (2). Dump hydraulic brake fluid in container (2) in approved area. 4. Disconnect bleeding tank from master cylinder. Refer to para 13-15d. NOTE Bleeding tank may be left connected to master cylinder if needed to bleed wheel cylinders. END OF TASK 13-121