(4)  
IPC 32-11-24 Fig. 1

 B.  
Access

 (1)  
Location Zone
 735 Wing Landing Gear, LH
 745 Wing Landing Gear, RH

 C.  
Remove the Relief Valve

 (1)
Install the ground locks in all landing gear (Ref 09-11-00/201).

 S 864-020
 S 494-021
 WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASK 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 OR DAMAGE TO EQUIPMENT.
 (2)  Do this task: "Installation of the Door Locks on the Wing Landing Gear" (Ref 32-00-30/201).
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 32-11-29
 ALL  ú ú 01 Page 401 ú Oct 10/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

747-400
MAINTENANCE MANUAL

SEE  A 
WING GEAR 
STRUT 
BLEED VALVE 
ATTACHING 
BOLT 
(4 PLACES) 
WING GEAR TRUCK 
POSITIONING ACTUATOR 
RELIEF 
VALVE 
BELLCRANK 
A 

Wing Gear Truck Positioning Actuator Relief Valve Installation
Figure 401

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 32-11-29
 ALL  ú ú 01 Page 402 ú Jun 10/88
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 S 494-025
 (3)  
Do this task: "Installation of the Door Locks on the Body Landing Gear" (Ref 32-00-30/201).

 S 844-004

 (4)  
Do this task: "Hydraulic system depressurization system No. 4" (AMM 29-11-00/201).

 S 844-005
 WARNING: YOU MUST RELEASE THE PRESSURE FROM THE ACTUATOR BEFORE YOU
_______ DISCONNECT THE HYDRAULIC LINES FROM THE ACTUATOR. HYDRAULIC FLUID IS UNDER PRESSURE AND CAN CAUSE INJURY TO PERSONS.
 (5)  
Open the bleed valve and release the pressure from the actuator.

 S 024-006

 (6)  
Remove bolts which connect the relief valve to the actuator and remove the relief valve.

 S 034-007

 (7)  
Remove and discard the O-ring and the backup rings from the relief valve.

 TASK 32-11-29-404-008
 3. The Relief Valve Installation on the Truck Positioning Actuator of the Wing
___________________________________________________________________________ Landing Gear (Fig. 401)
____________
 A. Consumable Materials
 (1)  
D00153 Hydraulic Fluid (Fire Resistant) - BMS 3-11

 (2)  
A00027 Adhesive - RTV - BAC5010 Type 60

 B.
References

 (1)  
09-11-00/201, Towing

 (2)  
12-12-01/301, Hydraulic Supply

 (3)  
29-11-00/201, Main Hydraulic Supply System

 (4)  
32-00-30/201, Landing Gear Door Locks

 (5)  
IPC 32-11-24 Fig. 1

 C.
Access

 (1)  
Location Zone
 735 Wing Landing Gear, LH
 745 Wing Landing Gear, RH

 D.
Install the Relief Valve

 (1)  
Install the ground locks in all landing gear (Ref 09-11-00/201).

 S 864-022
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 32-11-29
 ALL  ú ú 01 Page 403 ú Oct 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 S 864-023

 WARNING:_______ YOU MUST CAREFULLY DO THE STEPS IN THE TASK 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 OR DAMAGE TO EQUIPMENT.
　
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