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
