S 424-025
 (1)  
Install the valve mechanism (Fig. 401):

 (a)  
Install the rod (6) to the carrier (4) with the attach bolt (5), the bushing, the washers and the self-locking nut.

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747-400 MAINTENANCE MANUAL
 (b)  
Tighten the nut to 25-50 pound-inches.

 (c)  
Put the carrier (4) on the bracket with the clevis end of the valve aligned with the link (10).

 (d)  
Install the bolt (11) with the countersunk washer adjacent to the bolt head and the plain washer adjacent to the nut.

 (e)  
Tighten the nut to 25-50 pound-inches.

 (f)  
Install the four bolts (9) with the thin washers adjacent to the bolt head and the self-locking nut.

 (g)  
Tighten the nuts to 25-50 pound-inches.

 (h)  
Push the carrier against the valve spring until the mounting hole aligns with the hole in the bracket.

 (i)  
Install the bolt (3) with thin washers adjacent to the bolt head.

 (j)  
Install the cover (8) and the protective cover (13).

 S 094-045
 WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASK 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 OR DAMAGE TO EQUIPMENT.
 (2)  
Do this task: "Body Landing Gear Door Lock Removal" (Ref 32-00-30/201).

 S 034-027

 (3)  
Temporarily connect the rod (6) to the door fitting with the bolt (7).

 S 864-049
 WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF ALL CONTROL
_______ SURFACES BEFORE YOU SUPPLY HYDRAULIC POWER. AILERONS, RUDDERS, ELEVATORS, FLAPS, SPOILERS, LANDING GEAR, AND THRUST REVERSERS CAN MOVE QUICKLY WHEN YOU SUPPLY HYDRAULIC POWER. THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
 (4)  Pressurize hydraulic system No. 1 (Ref 29-11-00/201).
 S 864-029
 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.
 (5)  Make sure the ground release handle for the doors is in the DOORS CLOSED position.
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MAINTENANCE MANUAL

 S 494-030
 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.
 (6)
Install the ground locks in all landing gear (Ref 09-11-00/201).

 S 714-031

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

 (a)  
Move the control handle to the UP position.

 (b)  
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.
 (c)  Remove the rigging pin.
 S 824-032
 (8)  
If it is necessary, adjust the door fitting to permit the rigging pin installation (Ref 32-14-00/501).

 S 434-033

 (9)  
Tighten the nut on the bolt (7) to 25-50 pound-inches.

 E.
Put the Airplane to Its Usual Condition.

 S 864-034
 (1)  Put the control handle in the DN position.
 S 094-035
 WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASK 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 OR DAMAGE TO EQUIPMENT.
　
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