TM 9-2320-209-20-3-1 1. Join exhaust flex line (1) to elbow (2) using gasket (3) and coupling (4) as shown. NOTE Coupling must hold both flanges. Make sure gasket (3) is between flange of exhaust flex line (1) and flange of elbow ( 2). 2. Put bolt (5) through coupling (4) and screw on locknut (6). Using 7/16-inch wrenches, tighten locknut. GO TO FRAME 7