TM 9-2320-209-20-3-2 FRAME 3 CAUTION Do not over tighten coupling nuts. Screw on and finger tighten coupling nuts on fittings, then using wrenches, tighten nuts 1/8 turn. 1. Working at front of air reservoirs (1) and using 13/16-inch wrench, screw on and tighten coupling nut (2). 2. Using 7/8-inch wrench, screw on and tighten coupling nut (3). GO TO FRAME 4 13-235