(4)  
IPC 32-32-04 Fig. 2

 B.  
Access

 (1)  
Location Zone
 735 Wing Landing Gear, LH
 745 Wing Landing Gear, RH

 C.  
Prepare for the Removal

 S 494-027
 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 494-003
 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 OR DAMAGE TO EQUIPMENT.
 (2)  
Do this task: "Wing Landing Gear Door Lock Installation" (Ref 32-00-30/201).

 S 494-028

 (3)  
Do this task: "Body Landing Gear Door Lock Installation" (Ref 32-00-30/201).

 S 864-004

 (4)  
Remove the pressure from hydraulic system No. 4 (Ref 29-11-00/201).

 D.  
Remove the Sequence Valve.

 S 024-005
 (1)  
Remove the sequence valve (Fig. 401):

 (a)
Disconnect the hydraulic lines from the valve.

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 32-32-04
 ALL  ú ú 01 Page 402 ú Feb 10/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

747-400
MAINTENANCE MANUAL

SEE A
SWIVEL 
STRUT SIDE UPPER 
SEE  B  A A 
RIG PIN  1.  STRIKER ARM A  FWD 

Wing Landing Gear Downlock-Operated Sequence Valve and Mechanism Installation
Figure 401 (Sheet 1)

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 ALL  ú ú 01 Page 403 ú Feb 10/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

747-400 MAINTENANCE MANUAL
14. VALVE
2. BOLT (2 LOCATIONS)
RIGGING PIN HOLES
13. BOLT
3.
BOLT (4 LOCATIONS)

4.
ROLLER

12. BOLT  5. TOP COVER
11. LINK
10. CLEVIS
8.
BOLT

9.
BOLT

7. LEVER
RIGGING PIN HOLE
16. STRIKER
PLATES

1. STRIKER
ARM
4. ROLLER 6. OUTER COVER
B
11. LINK
RIGGING PIN
A-A
Wing Landing Gear Downlock-Operated Sequence Valve and Mechanism Installation Figure 401 (Sheet 2)
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 ALL  ú ú 01 Page 404 ú Feb 10/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 (b)  
Install the plugs in the hydraulic lines.

 (c)  
Remove the outer cover (6).

 (d)  
Remove the three bolts (2 and 13) and remove the valve assembly.

 (e)  
Remove the top cover (5).

 (f)  
Remove the bolt (9) and disconnect the link (11) from the roller lever (7).

 (g)  
Remove the clevis attach bolts (3) and remove the clevis assembly (10).

 (h)  
Remove the bolt (12) and remove the link (11) from the valve.

 (i)  
Remove the hydraulic fittings from the valve.

 (j)  
Install the caps on the valve ports.

 TASK 32-32-04-404-006
 3. Wing Landing Gear Downlock-Operated Sequence Valve Installation
_______________________________________________________________
 A. Special Tools and Equipment
 (1)  
G12001 Kit (Rigging Pins) ~............................................................. | Rigging Pin No. | Length (inch) | Diameter (inch)| ............................................................... | WD-5 | 3.25 | 0.185 to 0.188| ............................................................... | WD-6 | 3.25 | 0.185 to 0.188| 2....................…....................…...................1
　
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