S 434-010

 (4)  
Temporarily attach the connecting rod (8) to the rod end (7) with the bolt (6) but do not tighten it.

 S 094-010
 WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASKS BELOW TO REMOVE
_______ THE DOOR LOCKS FROM THE LANDING GEAR DOORS. THE DOORS CAN CLOSE QUICKLY IF YOU DO NOT REMOVE THE DOOR LOCKS CORRECTLY. THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
 (5)  
Do this task: "Body Landing Gear Door Lock Removal" (Ref 32-00-30/201).

 S 094-011

 (6)  
Do this task: "Wing Landing Gear Door Lock Removal" (Ref 32-00-30/201).

 S 714-012

 (7)  
Do a check of the door open adjustment to make sure the valve operates correctly:

 WARNING: MAKE SURE ALL PERSONS AND EQUIPMENT ARE AWAY FROM THE DOOR
_______ OPERATION AREA. A FAST MOVEMENT OF THE DOORS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
 (a)  Move the ground release handle for the doors for the main landing gear to the DOORS CLOSED position.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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747-400 MAINTENANCE MANUAL
 (b)  Move the control handle for the landing gear to the UP
 position.
 NOTE:____ This will open the doors to the fully open position.
 (c)  Install a rigging pin at point A through the two sides of the
 carrier and through the link.
 NOTE:____ The installation of the rigging pin shows the
 installation is in the permitted tolerance.

 CAUTION:_______MAKE SURE YOU REMOVE THE RIGGING PIN. FAILURE TO REMOVE THE RIGGING PIN WILL CAUSE DAMAGE TO THE MECHANISM IF THE DOOR OPERATES.
 (d)  
Remove the rigging pin.

 (e)  
Adjust the door fitting to permit the rigging pin installation if it is necessary (Ref 32-12-01/401).

 S 434-014
 (8)  
Tighten the nut on the attach bolt (6) to 25-50 pound-inches.

 S 424-015

 (9)  
Install the mechanism cover (11) with the four attach screws (10).

 S 494-016
 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.
 (10) Do this task:  "Wing Landing Gear Door Lock Installation" (Ref 32-00-30/201).
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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A
747-400 MAINTENANCE MANUAL
 S 494-012
 (11)
 Do this task:  "Body Landing Gear Door Lock Installation" (Ref 32-00-30/201).

 S 714-017

 (12)
 Do a check of the valve:

 (a)  
Put the control handle in the DN position for 3 minutes. 1) Do a check for leaks at the valve. 2) Make sure the retract actuator piston tries to retract

 approximately 1/4-inch.

 (b)  
Push the override button for the lever lock of the landing gear.

 (c)  
Move the control handle to the UP position for 3 minutes. 1) Do a check for leaks at the valve and the downlock actuator.

 2)  Make sure the retract actuator piston tries to extend approximately 1/4-inch.

 (d)  
Move the control handle to the DN position.

 S 094-018
 WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASKS BELOW TO REMOVE
_______ THE DOOR LOCKS FROM THE LANDING GEAR DOORS. THE DOORS CAN CLOSE QUICKLY IF YOU DO NOT REMOVE THE DOOR LOCKS CORRECTLY. THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
 (13)
 Do this task:  "Body Landing Gear Door Lock Removal" (Ref 32-00-30 201).

 S 094-013

 (14)
 Do this task:  "Wing Landing Gear Door Lock Removal" (Ref 32-00-30 201).
　
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