32-31-03
 ALL  ú ú 03 Page 401 ú Oct 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 B. References
 (1)  
09-11-00/201, Towing

 (2)  
29-11-00/201, Hydraulic Supply System

 (3)  
32-00-30/201, Landing Gear Door Locks

 (4)  
IPC 32-31-63 Fig. 1

 C.
Access

 (1)  
Location Zone
 137 Body Landing Gear Wheel Well, LH
 138 Body Landing Gear Wheel Well, RH

 D.
Prepare for the Removal of the Selector Valve.

 S 494-049
 WARNING: YOU MUST CAREFULLY INSTALL THE GROUND LOCKS IN ALL LANDING
_______ GEAR. AN ACCIDENTAL RETRACTION OF THE LANDING GEAR CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
 (1) Install the ground locks in all landing gear (Ref 09-11-00/201).
 S 494-050
 WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASKS BELOW TO INSTALL
_______ THE DOOR LOCKS ON THE LANDING GEAR DOORS. THE DOORS CAN CLOSE QUICKLY IF YOU DO NOT INSTALL THE DOOR LOCKS CORRECTLY. THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
 (2)  
Do this task: "Installation of the Door Locks on the Doors for the Wing Landing Gear" (Ref 32-00-30/201).

 S 494-052

 (3)  
Do this task: "Installation of the Door Locks on the Doors for the Body Landing Gear" (Ref 32-00-30/201).

 E.
Remove the Selector Valve.

 S 024-004
 (1)  
Remove the selector valve (1) (Fig. 401):

 (a)  
Put the control handle for the landing gear in the OFF position.

 (b)  
Install rigging pin LG-1 in the selector valve quadrant for the wing landing gear above the valve.

 (c)  
Disconnect the selector valve crank (12) from the selector valve (1).

 (d)  
Disconnect the hydraulic hoses from the valve (1).

 (e)  
Install a plug on the hydraulic hoses.

 (f)  
Remove the bolts (10) that attach the valve (1) to the structure.

 (g)  
Remove the selector valve (1) from the airplane.

 (h)  
Remove the hydraulic fittings (5 and 9) from the valve (1).

 (i)  
Install a plug on the ports.

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 32-31-03
 ALL  ú ú 01 Page 402 ú Feb 10/91
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747-400
MAINTENANCE MANUAL

CABLE LGV1A
CABLE LGV2A
CABLE LGV2B
SEE A CABLE LGV1B
SELECTOR VALVE QUADRANT
RIG PIN LG-1
10.  BOLT MOUNTING  SEE  B 
VALVE SELECTOR WING GEAR1. 
SELECTOR VALVE CRANK 12.  GEAR UP  RETURN GEAR DOWN 
A  PRESSURE 
Figure 401 (Sheet 1) Wing Landing Gear Selector Valve Installation 

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 32-31-03
 ALL  ú ú 01 Page 403 ú Feb 10/90
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A

747-400
MAINTENANCE MANUAL

1. WING GEAR SELECTOR VALVE
3. BACKUP
2. O-RING RING
2.
 O-RING

3.
 BACKUP

6. O-RING  RING
6.
 O-RING

7.
 BACKUP

4. O-RING RING
7.
 BACKUP
RING

8.
 O-RING

4. O-RING
8. O-RING
11. WASHER (4 LOCATIONS)
10. BOLT
(4 LOCATIONS)

5. ADAPTER
9. ADAPTER 5. ADAPTER
9. ADAPTER
B
Wing Landing Gear Selector Valve Installation Figure 401 (Sheet 2)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
　
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