TM 9-2320-209-20-3-4 c. Replacement. FRAME 1 1. Put heater (1) on support (2) between two hose clamps (3) as shown. 2. Put heater adapter (4) on heater (1) and aline screw holes. 3. Using wrench, screw in and tighten cap screw (5). 4. Using screwdriver, screw in and tighten two hose clamps (3). GO TO FRAME 2 23-90