TM 9-2320-361-20 14-32. PRIMARY HEATER AND DUCT REPLACEMENT This task covers: a. Heater Removal c. Duct Installation b. Duct Removal d. Heater Installation INITIAL SETUP: APPLICABLE MODELS REFERENCES (TM) M109A3 and M185A3 TM 9-2320-361-10 MATERIALS/PARTS O-ring Two gaskets a. Heater Removal 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. Remove heater harness (7) from heater (3). Remove clamp (5) and duct (6) from adapter (4). Remove four screws (10) and adapter (4) from heater (3). Remove three screws (2) and cover (1) from heater box (23). Remove two clamps (9), heater (3), washer (11), and O-ring (12) from support (14). Discard O-ring (12). Remove screw (21) and two screws (22) from guard (20). Remove guard (20) from support (14) and van wall (8). Remove four screws (18) from exhaust tube (17) and support (14). Remove four screws (16) from exhaust tube (17) and van wall (8). Remove exhaust tube (17) and gaskets (19) and (15) from support (14) and van wall (8). Discard gaskets (15) and (19). Remove four screws (13) and support (14) from van wall (8). TM 9-2320-361-20P EQUIPMENT CONDITION Parking brake set (TM 9-2320-361-10). 14-48