S 864-004

 (3)  
Go into the outboard main tank through the access opening, 546AB (left side) or 646AB (right side) (AMM 28-11-00/201).

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747-400 MAINTENANCE MANUAL
 (4)  S 034-005Disconnect the bonding jumper on the inlet tube from the structure.
 (5)  S 034-006Remove the bolts and the washers (6 locations) that attach the inlet tube to the tank end rib.
 (6)  S 034-030Remove the inlet tube. (a) Discard the gasket seal.
 (7)  S 014-007Remove the access doors, 545BB (left side) or 645BB (right side) (AMM 28-11-02/401).
 (8)  S 864-008Go into the inboard main tank (AMM 28-11-00/201).
 (9)  S 034-009Disconnect the bonding jumper from the valve body.
 S 034-031

 (10)
 Disconnect the bonding jumper for the outlet tube from the structure.

 S 034-010

 (11)
 Remove the support clamp for the outlet tube.

 S 034-011

 (12)
 Remove the clamp that holds the valve body to the wing rib.

 (a)  
Keep the two halves of the valve support ring for the installation task.

 S 024-012
 (13) Disengage the valve body from the adapter shaft that has splines.
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 S 034-032
 (14)
 Remove the valve body and the outlet tube from the airplane as a unit.

 (a)
Discard the gasket seal.

 S 034-013
 (15)
 Remove the lockwire from the tube coupling.

 S 034-033

 (16)
 Disconnect the coupling to isolate the valve body from the outlet tube.

 (a)
Discard the O-ring.

 TASK 28-16-05-404-014
 3.  Main Tank Transfer Valve Body Installation (Fig. 401)__________________________________________
 A. Equipment
 (1)
Bonding Meter (AMM 20-22-01/601)

 B.
Consumable Materials

 (1)
Grease - Silicone, Dow Corning Hy-Vacuum

 C.
References

 (1)
AIPC 28-16-05, Fig. 1

 (2)
AMM 20-11-15/401, Bonding Jumpers and Ground Leads

 (3)
AMM 20-22-01/601, Electrical Bonding

 (4)
AMM 28-11-00/201, Fuel Tanks

 D.
Access

 (1)  
Location Zones 545 Inbd Main Tank (Part), Mid Spar to Rear Spar, Left 546 Outbd Main Tank (Part), Mid Spar to Rear Spar, Left 573 Rear Spar to Inbd Aileron Leading Edge, Left 645 Inbd Main Tank (Part), Mid Spar to Rear Spar, Right 646 Outbd Main Tank (Part), Mid Spar to Rear Spar, Right 673 Rear Spar to Inbd Aileron Leading Edge, Right

 (2)  
Access Panels
 545BB Fuel Tank Access Panel
 546AB Fuel Tank Access Panel
 573AB Inbd Aileron Actuator Access Panel
 645BB Fuel Tank Access Panel
 646AB Fuel Tank Access Panel
 673AB Inbd Aileron Actuator Access Panel

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A
747-400
MAINTENANCE MANUAL

MAIN TANK TRANSFER VALVE BODY
SEE A
TANK END RIB  VALVE VALVE BODY SUPPORT CLAMP  RING SUPPORT VALVE  BONDING JUMPERS 
INLET TUBE MOUNTING BOLT (6 LOCATIONS)  GASKET SEALS  ADAPTER SHAFT 

BONDING JUMPER 
INLET TUBE  OUTLET TUBE SUPPORT CLAMP FOR THE 
MAIN TANK TRANSFER VALVE BODY OUTLET TUBE 
　
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