TM 9-2320-209-20-3-4 b. Removal. NOTE Tag air lines before taking them off to be sure they are put back in the same place. FRAME 1 1. Using wrench, unscrew and take off two coupling nuts (1). 2. Using screwdriver, unscrew and take out two screws (2). 3. Take out control valve (3). END OF TASK 23-112