WARNING: OBEY THE FUEL TANK ENTRY PRECAUTIONS (AMM 28-11-00/201).
_______ FAILURE TO OBEY THE FUEL TANK ENTRY PRECAUTIONS COULD CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (5)  
Obey the fuel tank entry precautions (AMM 28-11-00/201).

 S 014-003

 (6)  
Go into the center fuel tank.

 S 014-004

 (7)  
To remove the removal check valves of the fuel override pumps, remove the baffle doors, 134BZ, 134CZ, and 134DZ (AMM 06-41-00/201).

 S 034-005

 (8)  
Disconnect the flexible half coupling between the removal check valve and pump inlet line (AMM 28-25-05/401).

 S 034-006

 (9)  
Remove all fittings from the length of the pump inlet line that connects to the removal check valve (AMM 28-22-07/401).

 S 034-017

 (10)
 Move the pump inlet line away from the removal check valve.

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A

757 MAINTENANCE MANUAL
 S 034-007
 (11)
 Remove the six screws, washers, and nuts from the flange of the removal check valve.

 S 034-018

 (12)
 Remove the O-ring.

 S 024-019

 (13)
 Remove the removal check valve.

 TASK 28-22-08-404-008
 3.  Install the Removal Check Valve (Fig. 401)_______________________________
 A. References
 (1)  
AMM 06-41-00/201, Fuselage (Major Zones 100 and 200) Access Doors and Panels

 (2)  
AMM 28-11-00/201, Fuel Tanks

 (3)  
AMM 28-11-02/401, Center Tank Access Door

 (4)  
AMM 28-22-07/401, Fuel Line and Fittins

 (5)  
AMM 28-25-05/401, APU Fuel Line and Shroud

 B.
Access

 (1)  
Location Zones
 134 Wing Center Section (Right)
 531 Center Wing Tank (Left)
 631 Center Wing Tank (Right)

 (2)  
Access Panels
 134AZ Center Tank Access Door (Right)
 134BZ Baffle Door
 134CZ Baffle Door
 134DZ Baffle Door
 531AB Center Tank Access Door (Left)
 631AB Center Tank Access Door (Right)

 C.
Procedure

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