25-53-13
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 014-030
 WARNING:_______ MAKE SURE THAT ALL PERSONS AND EQUIPMENT ARE AWAY FROM THE DOOR
 OPERATION AREA.  A FAILURE OF THE LIFT MECHANISM CAN CAUSE THE
 DOOR TO CLOSE QUICKLY.  THIS CAN CAUSE INJURY TO PERSONS OR

 DAMAGE TO EQUIPMENT.
 (2)  Open the cargo compartment door (Ref 52-34-00/001).
 S 494-031
 WARNING: MAKE SURE YOU ARE CAREFUL WHEN YOU ARE IN THE AREA OF AN OPEN
_______ DOOR. YOU MUST INSTALL THE SAFETY BARRIER IN THE OPEN DOORWAY IF IT IS NECESSARY TO PREVENT FALLS.
 (3)  
Install the safety barrier in the open doorway if it is necessary.

 S 864-032

 (4)  
Push the caution light on the cargo control panel to make the light flash.

 S 864-033

 (5)  
Extend the lateral guide rails:

 (a)  
Move the power drive switch to the FWD or the AFT DRIVES position.

 (b)  
Move the lateral guide switch to the NORMAL position.

 (c)  
Move the joystick to the IN or the OUT position to extend the guide rails.

 (d)  
Make sure the guide rails extend.

 (e)  
Make sure the guide rails stay extended.

 S 864-034
 (6)  
Move the power drive switch to the OFF position.

 S 864-008

 (7)  
For the applicable guide rail actuator, open these circuit breakers and attach DO-NOT-CLOSE tags:

 (a)  
P86 Forward Lower Cargo Equipment Panel 1) BAY 2 RIGHT PDU 2) BAY 2 LEFT PDU 3) LATERAL GUIDE FWD 4) LATERAL GUIDE AFT

 (b)  
P59 Aft Lower Cargo Equipment Panel 1) BAY 9 RIGHT PDU 2) BAY 9 LEFT PDU 3) BAY 10 RIGHT PDU 4) BAY 10 LEFT PDU

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 25-53-13
 ALL  ú ú 16 Page 402 ú Oct 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 5) LATERAL GUIDE ACTUATOR 6) AFT LATERAL GUIDE
 S 014-009
 (8)  Remove the ball-transfer panels and the structural door assembly with splitter rail from the floor at Sta 664 and 1852 (BL 0.0) (Ref 25-53-15/401).
 E. Remove the Guide Rail Rod Assembly.
 S 024-010
 (1)  Disconnect the rod assembly from the crank assemblies and remove it from the airplane.
 NOTE: Keep the bolts, the nuts, the washers, and the bushings at
____ all the joints for the installation.
 TASK 25-53-13-404-011
 3. Guide Rail Rod Assembly Installation (Fig. 401)
____________________________________
 A. Special Tools and Equipment
 (1)  3PRE65B00040 Lower Cargo Door Opening Safety Barrier
 B. Consumable Materials
 (1)  D00013 Grease - MIL-G-23827
 C. References
 (1)  
24-22-00/201, Manual Control

 (2)  
25-53-00/501, Containerized Cargo Handling System

 (3)  
25-53-12/401, Guide Rail Extension/Retraction Actuator

 (4)  
25-53-15/401, Ball Transfer Panel

 (5)  
52-34-00/001, Forward/Aft Cargo Doors

 (6)  
IPC 25-53-14

 D. Access
 (1)  Location Zone 121 Forward Cargo Container Compartment Fwd Half, LH 122 Forward Cargo Container Compartment Fwd Half, RH 141 Aft Cargo Container Compartment, LH 142 Aft Cargo Container Compartment, RH
 E. Prepare for the Installation
 S 864-012
 (1)  Supply electrical power (Ref 24-22-00/201).
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