TM 9-2320-209-20-3-2 c. Replacement. 1. 2. 3. 4. Put quick-disconnect coupling (1) in place. Using adjustable wrenches, hold nut (2) and screw in and tighten quick- disconnect coupling (1). Put cover (3) in place. Using screwdriver, screw in and tighten two screws (4). NOTE Follow-on Maintenance Action Required: 1. Close air system drain valves. Refer to para 13-20. 2. Put on dummy coupling. Refer to TM 9-2320-209-10. END OF TASK 13-268