4-23. FUEL SYSTEM AND AIR INTAKE - Continued
4-23.7 Fuel Line, Hoses and Piping.
This task covers
Tool Kit, General Mechanic,
Main Engine Shutdown (see para. 2-10)
APU Shutdown (see para. 2-12)
RH and LH Engine Cover Removed
(see para. 4-12.11)
22, Appendix E, Pipe Sealant
101634-048 Hose Assembly
101635-068 Hose Assembly
54-F-08X06 Elbow, 45 deg
2-5110/1615 Hose Assembly
2-5160/1615 Hose Assembly
14338 Elbow 45 deg
25202/1615 Hose Assembly
2.5215/1615 Hose Assembly
JP-4 is a highly volatile fuel. Extraordinary care must be taken when servicing components that use this fuel.
The truck shall be grounded to an approved grounding point if it contains JP-4 fuel.
All hoses, pipes and fittings are accessible without removing any equipment except that if a connection has to
be removed from the fuel tank, the fuel tank aluminum decking must be removed, see para. 4-23.1.
Hoses and fittings may be replaced individually. When removing any component, always place a
receptacle beneath the disconnect on point. Be sure to catch all the fuel. Mop up the spills and dispose of
Prior to installation, coat all threads with pipe sealant (item 22 Appendix E).
Always prime the main engine and APU after replacing any components to be sure there is no air trapped
in the fuel system.
Any cracked, misthreaded or broken fittings must be replaced.
If hose shows signs of deterioration, replace as detailed in para. 4-9.