TM 9-2815-225-34&P 3-20.  AIR AFTERCOOLER REMOVAL THIS TASK COVERS: Removal INITIAL SETUP: APPLICABLE MODELS REFERENCES (TM) All TM 9-2320-273-20 TM 9-2320-283-20 SPECIAL TOOLS None TROUBLESHOOTING REFERENCES Para. 2-8 TEST EQUIPMENT None EQUIPMENT CONDITION    Oil pump removed (para. 3-19). MATERIALS/PARTS    Water crossover tube and connections removed Three gaskets (15434) 3008591 (TM 9-2320-273-20 or TM 9-2320-283-20). Three lockwashers (15434) S-604 (M915A1/Big   Cam III only) SPECIAL ENVIRONMENTAL CONDITIONS Three lockwashers (96906) MS122032 Work area clean and away from blowing dust and   (M915/Big Cam I only) dirt. PERSONNEL REQUIRED GENERAL SAFETY INSTRUCTIONS Automotive repairman MOS 63H None LOCATION/ITEM ACTION REMARKS Removal NOTE Perform steps 1 and 2 for M915/Big Cam I only. Perform steps 3 and 4 for M915A1/Big Cam III only. 1. Three screws (5), lock- Remove from cylinder heads (1) Two screws (5) may have been washers (4), and washers and air aftercooler (2). previously removed.  Discard (3) lockwashers (4). 2. Six screws (6) and Remove from cylinder heads (1) Install one suitable guide pin at washers (7) and air aftercooler (2). each end of air aftercooler (2) before removing last two screws (6). 3. Screw (8), lockwasher (4), Remove from cylinder heads (1) Screws (5) may have been washer (3), two screws (5), and air aftercooler (2). previously removed.  Discard lockwashers (4), and four lockwashers (4). washers (3) 4. Six captive washer Remove from cylinder heads (1) Install one suitable guide pin at screws (6) and air aftercooler (2). each end of air aftercooler before removing last two screws. 5. Air aftercooler (2) Remove from cylinder heads (1) Remove guide pins from cylinder and lift off guide pins. heads (1). 6. Three gaskets (9) Remove from cylinder heads (1) Discard gaskets (9). or air aftercooler (2). FOLLOW-ON TASKS: For repair of air aftercooler (para. 3-45). For installation of air aftercooler (para. 3-87). 3-46