TM 9-2320-209-20-3-2 c. Replacement. (1) Air lines and clamps. CAUTION Fittings are made of soft brass. They can be stripped if tightened too much. Tighten fittings just enough to stop air from leaking. NOTE The air valve supply line at left rear of chassis on truck M275A2 is used for this typical task. 1. Put air tube (1) in place as shown. 2. Using 3/4-inch combination box and open end box wrench, hold tee fitting (2). 3. Using 13/16-inch combination box and open end box wrench, screw on and tighten tube nut (3). 4. Using 7/8-inch combination box and open end box wrench, screw on and tighten tube nut (4). GO TO FRAME 2 13-156