TM 9-2350-287-20-1 CHAPTER 4 FUEL SYSTEM MAINTENANCE Paragraph Page Number Paragraph Title Number 4-1 General  ............................................................................................................................................ 4-1 4-2 Fuel System Draining ........................................................................................................................ 4-2 4-3 Right Electric Fuel Pump and Check Valve Repair ............................................................................ 4-3 4-4 Left Electric Fuel Pump and Check Valve Repair  .............................................................................. 4-4 4-5 APU Cargo Compartment Fuel Hoses, Pumps, and Fittings Replacement  ........................................ 4-5 4-6 Personnel Heater Fuel Pump Replacement  ...................................................................................... 4-14 4-7 Engine-Driven Fuel Pump Replacement ............................................................................................ 4-16 4-8 Engine-Driven Fuel Pump Relief Valve Replacement ........................................................................ 4-17 4-9 Air Cleaner Ducts and Hoses Replacement ....................................................................................... 4-18 4-10 Air Cleaner Repair ............................................................................................................................ 4-21 4-11 Air Cleaner Box Assembly Repair ..................................................................................................... 4-27 4-12 Air Cleaner Restriction Indicator Replacement  .................................................................................. 4-29 4-13 Air Cleaner Fan Assembly Replacement ........................................................................................... 4-31 4-14 Air Cleaner Filter Replacement.......................................................................................................... 4-33 4-15 Turbocharger Oil Hoses Replacement  .............................................................................................. 4-36 4-16 Powerpack Fuel Lines Replacement ................................................................................................. 4-38 4-17 Fuel Hoses, Lines, and Fittings Replacement  ................................................................................... 4-48 4-18 Primary Fuel Filter Assembly Lifting Bracket Replacement ................................................................ 4-56 4-19 Secondary Fuel Filter Assembly Lifting Bracket Replacement  ........................................................... 4-57 4-20 Filler Neck Assembly Seal Replacement ........................................................................................... 4-58 4-21 Filler Neck Assembly Replacement  .................................................................................................. 4-60 4-22 Upper Fuel Tank Level Transmitter Replacement  ............................................................................. 4-61 4-23 Lower Fuel Tank Level Transmitter Replacement  ............................................................................. 4-63 4-24 Heat Shield Repair  ........................................................................................................................... 4-65 4-25 Primary Fuel Filter Assembly Replacement ....................................................................................... 4-72 4-26 Secondary Fuel Filter Assembly Replacement .................................................................................. 4-75 4-27 Glow Plug and Glow Plug Controller Replacement ............................................................................ 4-79 4-28 Accelerator, Throttle, and Engine Control Governor Replacement and Adjustment  ........................... 4-84 4-29 Fuel Shutoff Assembly Replacement  ................................................................................................ 4-100 4-1.  GENERAL. This section contains instructions on how to remove, disassemble, clean, inspect, assemble, test, and install the fuel system.  The fuel system consists of the following: Electric fuel pumps Engine-driven fuel pump Fuel check valves Fuel filter assemblies Fuel tank level transmitters Hoses, tubes, and fittings Change 1  4-1