32-21-05
 ALL  ú ú 01 Page 607 ú Jun 10/88
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 NOSE LANDING GEAR SIDE BRACE ASSEMBLY - REMOVAL/INSTALLATION
____________________________________________________________
 1.  General_______
 A. This procedure contains two tasks:
 (1)  
The removal of the side brace assembly from the nose landing gear.

 (2)  
The installation of the side brace assembly on the nose landing gear.

 TASK 32-21-06-004-001
 2.  Nose Landing Gear Side Brace Assembly Removal (Fig. 401)_____________________________________________
 A. Special Tools and Equipment
 (1)  
G12001 Kit (Rigging Pins) ~............................................................... | Rigging Pin No. | Length (inch) | Diameter (inch) | ................................................................. | NS-5 | 4.00 | 0.309 to 0.311 | 2....................….....................…....................1

 B.
References

 (1)  
AMM 07-11-02/201, Jacking Airplane Nose

 (2)  
AMM 09-11-00/201, Towing

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

 (4)  
AMM 32-51-00/501, Nose Wheel Steering System

 (5)  
AIPC 32-21-06 Fig. 1

 (6)  
AIPC 32-61-58 Fig. 1

 C.
Access

 (1)  
Location Zone
 715 Nose Landing Gear

 D.
Prepare for the Procedure

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

 S 494-015
 S 494-016
 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 Nose Landing Gear" (Ref 32-00-30/201).
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 32-21-06
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A

747-400
MAINTENANCE MANUAL

MOUNTING BRACKET HYDRAULIC LINES  LINES HYDRAULIC 
2. NUT 1. LOCKBOLT 
SEE  A  O-RINGS  7.  NOSE GEAR TRUNNION 
SEE  B  6. LUBE INSERT  5. BOLT  3. UPPER SIDE BRACE LINES CLAMP 4. HYDRAULIC 
FWD  A 
3. LOWER SIDE BRACE 
O-RINGS  LINES CLAMP 4. HYDRAULIC  8. LOCKBOLT 
12. LUBE INSERT 
11. BOLT  9. NUT 
WASHER  BRACKET SUPPORT PULLY 10. CABLE 
FWD  15. WASHER 14. SUPPORT (RIGHT SIDE ONLY) BRACKET  13. STIRRUP 
B 

Side Brace Installation
Figure 401

EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 32-21-06
 ALL  ú ú 01 Page 402 ú Feb 18/01
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747-400 MAINTENANCE MANUAL
 S 584-004
 WARNING: MAKE SURE YOU FULLY EXTEND THE SHOCK STRUT ON THE NOSE LANDING
_______ GEAR BEFORE YOU DISCONNECT THE DRAG BRACE. IF YOU DO NOT EXTEND THE SHOCK STRUT FULLY, A MOVEMENT OF THE PARTIAL COMPRESSED SHOCK STRUT CAN CAUSE INJURY TO PERSONS.
 (3)  Lift the nose of the airplane with jacks until the wheels are immediately above the ground (AMM 07-11-02/201).
 NOTE: Do not deflate the shock strut.
____
 S 494-005
 (4)  
Align the shock strut in the straight position and install the rigging pin in the link drum of the trunnion pivot.

 (a)  
Install the rigging pin in the summing lever of the shock strut on the nose landing gear (AMM 32-51-00/501).

 (b)  
Loosen NWS2A and NWS2B cables tension at turnbuckles.

 E.
Procedure

 S 024-006
 (1)  
Remove the side brace.

 (a)  
Remove all screws to remove hydraulic clamps (4) from the side braces.
　
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