(a)  
Install the new O-rings (19 and 21) and backup rings (18 and 20) on the cap (22) and valve (17). 1) Apply the hydraulic fluid or the assembly lube to the

 O-rings, the backup rings and the threads of the fittings.

 (b)  
Use a 5/8-18 bolt to install the valve. 1) Tighten the cap to 60-70 pound-inches (6.78-7.91Nm). 2) Install the lockwire on the cap.

 S 092-077
 (2)  
Remove the spoiler actuator locking tool.

 S 862-078

 (3)
Remove the DO-NOT-CLOSE tags and close these circuit breakers:

 (a)  
P180, DC Power Distribution Panel
 1) 180E22, LATERAL CONT VLV SYS 4

 S 862-079
 (4)  
Put the FLT CONTROL HYD POWER - WING system 4 switch on the pilot's overhead panel P5 to the NORM position.

 S 862-080

 (5)  
Do this task to pressurize hydraulic systems No. 1 and 4:
 "Hydraulic System Pressurization" (AMM 29-11-00/201).

 S 872-081

 (6)  
Extend and retract the spoiler to bleed the hydraulic system.

 S 792-082

 (7)  
Examine the valve cap for leaks.

 G.
Put the Airplane Back to Its Usual Condition

 S 862-095
 WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF THE LE AND TE
_______ FLAPS AND FLAP DRIVE MECHANISMS BEFORE YOU MOVE THE FLAP CONTROL LEVER. WITH HYDRAULIC POWER REMOVED, THE FLAPS WILL MOVE AUTOMATICALLY BY ELECTRICAL POWER WHEN YOU MOVE THE FLAP CONTROL LEVER.
 (1)  Put the flap control lever in the UP detent to retract the trailing edge flaps.
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A 747-400 MAINTENANCE MANUAL
 (2)  S 412-084Close the access panel on the lower surface of the wing.
 (3)  S 862-085Do this task to depressurize hydraulic systems No. 1 and 4: "Hydraulic System Depressurization" (AMM 29-11-00/201).
 (4)  S 612-086Do this task:  "Hydraulic Reservoir Servicing" (AMM 12-12-01/301).
 (5)  S 862-087Do this task:  "Remove Electrical Power" (AMM 24-22-00/201).
 (6)  S 862-088Remove the DO-NOT-CLOSE tags and close these circuit breakers: (a) P7, Overhead Circuit Breaker Panel 1) 7G6, SPEED BRAKE AUTO CONT

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A
747-400 MAINTENANCE MANUAL
 SPEED BRAKE SEQUENCE MECHANISM - REMOVAL/INSTALLATION
_____________________________________________________
 1.  General_______
 A.  There are two tasks in this procedure. There is a task for the removal and a task for the installation of the speed brake sequence mechanism.
 (1)  
The removal procedure has these parts:

 (a)  
The installation of the landing gear door locks

 (b)  
The extension of the spoilers

 (c)  
The removal of the sequence mechanism.

 (2)  
The installation procedure has these parts:

 (a)  
The installation of the sequence mechanism

 (b)  
The application of hydraulic power

 (c)  
A test of the sequence mechanism

 (d)  
The removal of hydraulic power

 (e)  
The removal of the landing gear door locks.

 TASK 27-62-06-004-001
 2.  Speed Brake Sequence Mechanism Removal (Fig. 401)_________________________________________________
 A.  Special Tools and Equipment
 (1)  
G12001-50 Rig Pin Kit

 B.  
References

 (1)  
29-11-00/201, Main Hydraulic Supply System

 (2)  
32-00-30/201, Landing Gear Door Locks

 (3)  
IPC 27-62-06 Fig. 1

 (4)  
IPC 27-62-16 Fig. 1
　
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