TM 9-2320-361-20 14-32. PRIMARY HEATER AND DUCT REPLACEMENT (Contd) d. Heater Installation 1. 2. 3. 4. 5. 6. 7. 8. Install support (22) on van wall (13) with four screws (21). Install exhaust tube (25) and new gasket (23) on van wall (13) with four screws (24). Install exhaust tube (25) and new gasket (27) on support (22) with four screws (26). Install guard (28) on van wall (13) with two screws (30). Install guard (28) on support (22) with screw (29). Install new O-ring (34), washer (35), and heater (16) on support (22) with two clamps (32). Install cover (14) on heater box (31) with three screws (15). Install adapter (17) on heater (16) with four screws (33). Install duct (19) on adapter (17) with clamp (18). Install heater harness (20) on heater (16). FOLLOW-ON TASK: Check heater for proper operation (TM 9-2320-361-10). 14-51