(1)  
Remove the valve cover and the protective cover.

 (2)  
Disconnect the rod from the door fitting.

 (3)  
Remove the carrier.

 (4)  
Remove the rod from the carrier.

 (5)  
Remove the valve mechanism.

 E.  
To install the mechanism for the door-operated sequence valve these steps are necessary:

 (1)  
Connect the rod to the carrier.

 (2)  
Connect the carrier to the valve.

 (3)  
Install the valve cover and the protective cover.

 (4)  
Do a check of the door open adjustment.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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A
747-400 MAINTENANCE MANUAL
 (5)  Do a check of the operation of the wheel well doors for the main landing gear.
 TASK 32-33-02-004-001
 2. Body Landing Gear Door-Operated Sequence Valve Removal
______________________________________________________
 A. References
 (1)  
09-11-00/201, Towing

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

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

 (4)  
IPC 32-33-02 Fig. 2

 B.
Access

 (1)  
Location Zone
 755 Body Landing Gear, LH
 765 Body Landing Gear, RH

 C.
Prepare for the Removal

 S 494-040
 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 494-041

 (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. 1 (Ref 29-11-00/201).

 D.
Remove the Sequence Valve.

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

 (a)  
Disconnect the hydraulic hoses from the valve.

 (b)  
Install a cap on the hydraulic hoses.

 (c)  
Remove the cover (8).

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

747-400
MAINTENANCE MANUAL

SEE A
BRACKET
2. VALVE
1. BOLT
3.
BOLT

4.
CARRIER
SEE B

5.
BOLT

6.
ROD

7.
BOLT
DOOR FITTING

14. LANDING GEAR DOOR
A
Body Landing Gear Door-Operated Sequence Valve and Mechanism InstallationFigure 401 (Sheet 1)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 32-33-02
 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

1.
BOLT

2.
VALVE

11. BOLT
CLEVIS 
12. NYLON 
10. LINK  WASHERS 
POINT A 
RIGGING 
PIN HOLE 
9. BOLT 
(4 LOCATIONS) 
13. PROTECTIVE 
COVER 

4. CARRIER
(4 LOCATIONS)
　
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