12-78. TM 9-2320-361-20 This task covers: a. Removal b. Installation INITIAL SETUP: APPLICABLE MODELS EQUIPMENT CONDITION M185A3, M109A3 Exhaust blower motor and bracket removed REFERENCES (TM) (para. 12-60). TM 9-2320-361-20P 1.Remove four screws (1) and adapter (3) from duct assembly (2). 2. Remove eight screws (5) and four angles (4) from van wall (7). 3. Remove four screws (6) and duct assembly (2) from van wall (7). 1. Install duct assembly (2) on van wall (7) with four screws (6). 2. Install four angles (4) on van wall (7) with eight screws (5). 3. Install adapter (3) on duct assembly (2) with four screws (1). FOLLOW-ON TASK: Install exhaust blower motor and bracket (para. 12-60). 12-126