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757 
MAINTENANCE MANUAL
 E.  Procedure
 S 944-014
 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.
 (1) Obey the fuel tank entry precautions (AMM 28-11-00/201).
 S 214-018
 (2) Make sure the two sides of the rear spar are clean at each bolt hole
 location.
 S 434-019
 (3) Put a new seal (5) between the rear spar and the valve body (8).
 S 424-015
 (4) Put the valve body (8) in position between the APU fuel lines (7)
 with the flange (1) on the top side of the valve body (8).
 S 434-020
 (5) From out of the fuel tank, put the washers (4) on the four
 screws (3).
 S 434-016
 (6) Install the screws (3) through the rear spar into the valve
 body (8).
 ú
 ú  S 434-028
 ú  (7) Tighten the four screws (3) to 50-75 pound-inches (5.7-8.4
 ú  newton-meters).
 S 434-017
 (8) Install the lockwire on the screws (3).
 S 224-021
 (9) Make sure the bonding resistance between the valve body (8) and the
 airplane structure is not more than 0.005 ohms (AMM 20-10-21/601).

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MAINTENANCE MANUAL

 S 394-022
 (10)
 From out of the fuel tank, apply chromate type sealant (BMS 5-95) around all four screws (3) (AMM 51-31-01/201).

 S 434-023

 (11)
 From in the fuel tank, use new O-rings (9) and connect the flexible full couplings (6) on the two sides of the valve body (8) (AMM 28-25-05/401).

 S 414-024

 (12)
 Install the baffle doors, 134DZ, 134CZ, and 134BZ (AMM 06-41-00/201).

 S 414-025

 (13)
 Install the center tank access door, 134AZ (AMM 28-11-02/401).