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.

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 BODY LANDING GEAR UPLOCK ACTUATOR - REMOVAL/INSTALLATION
________________________________________________________
 1. General
_______
 A. This procedure contains these two tasks:
 (1)
The removal of the uplock actuator for the body landing gear

 (2)
The installation of the uplock actuator for the body landing gear.

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

 (1)
Disconnect the hydraulic lines from the actuator.

 (2)
Remove the actuator.

 (3)
Remove the hydraulic fittings from the actuator.

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

 (1)
Install the hydraulic fittings in the actuator.

 (2)
Fill the actuator with the hydraulic fluid.

 (3)
Install the actuator.

 (4)
Connect the hydraulic lines to the actuator.

 (5)
Do a check of the actuator for leaks.

 TASK 32-33-14-004-001
 2. Body Landing Gear Uplock Actuator Removal
_________________________________________
 A. References
 (1)
AMM 09-11-00/201, Towing

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

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

 (4)
IPC 32-33-08 Fig. 2

 (5)
IPC 32-33-14 Fig. 2

 B.
Access

 (1)  
Location Zone
 755 Body Landing Gear, LH
 765 Body Landing Gear, RH

 C.
Prepare for the Removal

 S 494-016
 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.
 (1) Install the ground locks in all landing gear (AMM 09-11-00/201).
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 494-003
 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.
 (2)  
Do this task: "Wing Landing Gear Door Lock Installation" (AMM 32-00-30/201).

 S 494-017

 (3)  
Do this task: "Body Landing Gear Door Lock Installation" (AMM 32-00-30/201).

 S 864-004

 (4)  
Remove the hydraulic pressure from system No. 1 (AMM 29-11-00/201).

 D.
Remove the Uplock Actuator.

 S 024-005
 (1)  
Remove the uplock actuator (1) (Fig. 401):

 (a)  
Disconnect the hydraulic lines from the actuator.

 (b)  
Install the caps on the hydraulic lines.

 (c)  
Remove the bolt (12) from the actuator (1) rod end.

 (d)  
Remove the nut (4) from the hook pivot pin (3).

 (e)  
Remove the actuator (1) from the uplock assembly.

 (f)  
Remove the hydraulic fittings (13 and 18) from the actuator (1).

 (g)  
Install the plugs in the hydraulic ports.

 TASK 32-33-14-404-006
 3.  Body Landing Gear Uplock Actuator Installation______________________________________________
 A. Consumable Materials
 (1)  
D00288 Lubricant - MCS 352 (Skydrol Assembly Lube)

 (2)  
D00196 Fluid - Hydraulic BMS 3-11, Type IV, Class 1
　
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