TM 9-2320-209-20-3-3 a. Replacement. 1. 2. 3. GO CAUTION Do not overtighten hose assembly fittings. Finger tighten adapters, then using wrench, tighten 1/8 turn more. Working under truck, put in hose assemblies (1 and 2). Using 5/8-inch wrench, hold line fitting (3). Using 11/16-inch wrench, screw on and tighten two fittings (4) to two couplings (5). Using 11/16-inch wrenches, screw on and tighten hose assembly fittings (6) to valve fittings (7). TO FRAME 2 18-451