S 434-023

 (4)  
Install the hydraulic fittings in the valve:

 (a)  
Lubricate the O-rings and fitting with hydraulic fluid or lubricant.

 (b)  
Install the hydraulic fittings with O-rings in the ports of the valve.

 S 424-024
 (5)  
Install the valve (Fig. 401):

 (a)  
Put the washers on the valve attach bolts.

 (b)  
Put the valve body in its position on the support bracket.

 (c)  
Install the attach bolts.

 (d)  
Remove the plugs from the hydraulic lines.

 (e)  
Connect the hydraulic lines to the valve.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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A
747-400 MAINTENANCE MANUAL
 S 864-025
 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.
 (6)  
Pressurize hydraulic system No. 4 (Ref 29-11-00/201). S 794-028

 (7)  
Put the landing gear handle to the UP position. S 794-011

 (8)  
Do a check of the hydraulic connections to the valve for leaks. S 794-029

 (9)  
Put the landing gear handle to the DOWN position.

 S 094-014 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 AND DAMAGE TO EQUIPMENT.
 (10)
 Do this task:  "Wing Landing Gear Door Lock Removal" (Ref 32-00-30/201).

 S 094-015

 (11)
 Do this task:  "Body Landing Gear Door Lock Removal" (Ref 32-00-30/201).

 S 864-016

 (12)
 Remove the pressure from hydraulic system No. 4 (Ref 29-11-00/201).

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 WING LANDING GEAR UPLOCK MECHANISM - REMOVAL/INSTALLATION
_________________________________________________________
 1.  General_______
 A. This procedure contains these two tasks:
 (1)  
The removal of the uplock mechanism for the wing landing gear

 (2)  
The installation of the uplock mechanism for the wing landing gear.

 B.
To remove the uplock mechanism these operations are necessary:

 (1)  
Disconnect the uplock actuator.

 (2)  
Disconnect the operator rod from the uplock-operated sequence valve.

 (3)  
Disconnect the uplock sensor.

 (4)  
Remove the uplock mechanism.

 C.
To install the uplock mechanism these operations are necessary:

 (1)  
Install the uplock mechanism in the correct position.

 (2)  
Install the uplock sensor.

 (3)  
Connect the uplock-operated sequence valve to the operator rod.

 (4)  
Connect the uplock actuator.

 (5)  
Do a check of the uplock mechanism in the alternate extend mode.

 (6)  
Do a check of the uplock mechanism in the extend mode.

 (7)  
Make sure the uplock-operated sequence valve aligns correctly.

 TASK 32-32-08-004-001
 2.  Wing Landing Gear Uplock Mechanism Removal__________________________________________
 A. Special Tools and Equipment
 (1)
30HME65B00161-950 Hoist, Landing Gear Uplock Assembly (Strap)

 B.
References

 (1)  
　
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本文鏈接地址：747-400 AMM 飛機(jī)維護(hù)手冊(cè) 起落架 LANDING GEAR 4(82)