CHAPTER 4: MAINTENANCE OF MAIN ENGINE FUEL, AIR INTAKE, TM 9-2350-256-20 AND EXHAUST SYSTEMS 4-10 REPLACE/REPAIR FUEL VALVE LINES AND FITTINGS THIS TASK COVERS a.  Removal b.  Repair c.  Installation INITIAL SET-UP Tools: Equipment Conditions: Tool kit, general mechanic's (Appendix C, • Fuel tank drain valves opened and fuel tank item 53) drained, or fuel shutoff valves turned to OFF (refer to TM 9-2350-256-10) Material/Parts: • Rear center floor plate removed (see paragraph 9-12) • Tape, sealant (Appendix D, item 30) • Rear left-side intermediate floor plate removed (see • Bushing (Appendix G, item 4) paragraph 9-13) • Bushing (Appendix G, item 6) • Stowage basket center left floor plate removed (see • Lockwashers (10) (Appendix G, item 130) paragraph 9-14) • Intermediate rear left-side floor plate removed (see paragraph 9-16) • Toolbox rack removed (see paragraph 9-47) NOTE For installation purposes, parts indicated with an asterisk (*) need sealant tape. a.  REMOVAL Remove lines and fittings as required using illustration as guide. 1 Elbow 29    Elbow 2 Reducer 30    Elbow* 3 Left fuel tank control valve assembly 31    Hose assembly, fuel return from engine port 95* 4 Nipple 32    Coupling 5 Hose assembly, purge pump to fuel vent 33    Coupling (2) 6 Screw (10) 34    Hose assembly, right tank air vent 7 Lockwasher (10) 35    Loop clamp (2) 8 Loop clamp (5) 36    Hose assembly, forward tank air vent from port 94 9 Loop clamp (7) 37    Elbow 10    Hose assembly, fuel line to personnel heater 38    Coupling* 11    Elbow* 39    Grommet 12    Connecting ring 40    Bushing 13    Bushing* 41    Coupling 14    Coupling* 42    Tee* 15    Coupling* 43    Coupling 16    Hose assembly, fuel line to APU 44    Coupling 17    Hose assembly, auxiliary power unit (APU) fuel return 45    Hose assembly, forward tank vent 18    Elbow* 46    Loop Clamp 19    Tube assembly* 47    Elbow 20    Elbow 48    Elbow 21    Connecting ring 49    Hose assembly, forward tank to engine at port 96 22    Coupling 50    Reducer* 23    Hose assembly, port 96 to engine 51    Tee* 24    Elbow 52    Hose assembly, fuel return from engine port 95 25    Coupling 53    Reducer* 26    Connecting ring 54    Hose assembly, purge pump to bulkhead 27    Hose assembly, purge pump to engine at port 97 55    Coupling 28    Elbow 4— 22