TM 9-2815-225-34&P 3-16.  FUEL PUMP REMOVAL THIS TASK COVERS: Removal INITIAL SETUP: APPLICABLE MODELS REFERENCES (TM) All TM 9-2320-273-20 TM 9-2320-283-20 SPECIAL TOOLS Air compressor wrench (15434) 3375159 TROUBLESHOOTING REFERENCES None TEST EQUIPMENT None EQUIPMENT CONDITION    Accessory drive pulley removed (para. 3-15). MATERIALS/PARTS    Fuel pump engine retarder switch removed Cap and plug set (Appendix C, Item 31) (TM 9-2320-273-20 or TM 9-2320-283-20). Lockwasher (12204) 116122    Fuel filter and water separator removed Lockwasher (96906) MS35338-46 (TM 9-2320-273-20 or TM 9-2320-283-20). Two lockwashers (96906) MS122032 Three lockwashers (15434) S-604 SPECIAL ENVIRONMENTAL CONDITIONS Gasket (15434) 3035053 Work area clean and away from blowing dust and dirt. PERSONNEL REQUIRED Automotive repairman MOS 63H GENERAL SAFETY INSTRUCTIONS None LOCATION/ITEM ACTION REMARKS Removal NOTE Cap or plug all openings immediately after removal to prevent contamination. Perform  steps  1  through  4  for  M915/Big  Cam  I  equipped  with  Air  Signal  Attenuator (ASA) air tank.  Some Big Cam I engines may or may not have an ASA air tank. 1.   Four hose clamps (3) and Remove from elbow (7), check two air supply hoses (6) valve (2), and two adapters (35). 2.   Two adapters (35), check Remove from fuel pump (33), air valve (2), and elbow (7) tank (12), and aftercooler (9). 3.   Screw (11), lockwasher (5), Remove from aftercooler (9) and Discard lockwasher (5). washer (10), and air tank clamp (1). (12) 4.   Nut (4), lockwasher (5), Remove from air tank (12). Discard lockwasher (5). screw (8), and clamp (1) NOTE Perform step 5 for M915A1/Big Cam III only. 5. Nut (4), lockwasher (13), Remove from bracket (15) and Discard lockwasher (13). washer (14), and screw (16) clamp (17). 6. Air supply tube (18) and Remove from fuel pump (33) and adapters (22) and (35) aftercooler (9). 3-30