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A
747-400 MAINTENANCE MANUAL
A
A
SEE B
SEE A
SEE C
UPLOCK-OPERATED SEQUENCE VALVE
____THE BAR MUST BE
NOTE: BETWEEN THE EDGES OF THE SLOT.
A-A  A
UPLOCK-OPERATED SEQUENCE VALVE
ACTUATOR ROD
VALVE CLEVIS
BOLT BOLT
ACTUATOR ROD
UPLOCK MECHANISM
C
B
Wing Landing Gear Uplock-Operated Sequence Valve and Valve Mechanism Installation
Figure 401

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747-400
MAINTENANCE MANUAL

 TASK 32-32-06-404-006
 3. Wing Landing Gear Uplock-Operated Sequence Valve Installation
_____________________________________________________________
 A. Consumable Materials
 (1)  
D00288 Lubricant - MCS 352 (Skydrol Assembly Lube)

 B.
References

 (1)  
AMM 09-11-00/201, Towing

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

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

 (4)  
AIPC 32-32-06 Fig. 1

 C.
Access

 (1)  
Location Zone
 135 Wing Landing Gear Well, LH
 136 Wing Landing Gear Well, RH

 D.
Procedure

 S 434-043
 (1)
Install the hydraulic fittings if they are not in the valve:

 (a)  
Lubricate the O-rings, the backup rings and the fittings with the Skydrol Assembly Lube or the hydraulic fluid.

 (b)  
Install the hydraulic fittings with the O-rings and backup rings installed in the ports.

 S 424-044
 (2)  
Install the valve (Fig. 401):

 (a)  
Attach the sequence valve with the three bolts and the thin washers.

 (b)  
Connect the actuator rod to the valve clevis with the thin washers adjacent to the bolt head and the nut.

 (c)  
Install the nut and the cotter pin.

 S 864-036
 (3)
Make sure the uplock hook is in the open (gear down) position.

 S 214-037

 (4)  
Make sure the bar on the valve slide is between the two edges of the slot.

 NOTE: The slot is on the top end of the valve (See section
____
 A-A, Fig. 401).

 S 434-038
 (5)  
Remove the caps and plugs from the hydraulic lines.

 (6)  
Connect the hydraulic lines to the valve.

 S 434-039
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747-400 MAINTENANCE MANUAL
 S 094-029
 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.
 (7)  
Do this task: "Body Landing Gear Door Lock Removal" (AMM 32-00-30/201).

 S 094-030

 (8)  
Do this task: "Wing Landing Gear Door Lock Removal" (AMM 32-00-30/201).

 S 494-031 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.
 (9)  
Install the ground locks in all landing gear (Ref 09-11-00/201). S 864-032

 (10)
 Make sure the control handle for the landing gear is in the DN position.
　
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