S 984-011
 (2)  Manually move the upper link (in the restrained position) through its arc.
 NOTE: Move the upper link until there is sufficient clearance
____ between the link and the P37 panel or the housing of the runway turnoff light.
 S 494-012
 CAUTION:_______DO NOT LET THE TORSION LINK FALL. IF THE TORSION LINK FALLS, DAMAGE TO THE MOUNTING BRACKET OF THE SQUAT SWITCH CAN OCCUR.
 (3)  Use the hold tool for the torsion link to safety the link until it is clear of the nose wheel tires.
 S 864-013
 CAUTION: OPEN THE CIRCUIT BREAKER BEFORE YOU DO THE PROCEDURE THAT
_______ FOLLOWS. DAMAGE TO THE EQUIPMENT OR UNWANTED OPERATION TIME CAN OCCUR IF YOU DO NOT OPEN THE CIRCUIT BREAKER.
 (4)  
Open the 7G23 BODY GR STRG ARM AC circuit breaker on the P7 Overhead Circuit Breaker Panel.

 S 864-014

 (5)  
Open the 7G24 BODY GR STRG ARM DC circuit breaker on the P7 Overhead Circuit Breaker Panel.

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

SEE  A 
B 
B 
A 
A 
FWD 
A 
5.5 
UPPER 
TORSION  CRIMP FERRULE 
CABLE  LINK  (2 PLACES) 
BUTTON 
QUICK- 14.0 
RELEASE 
PIN 
APEX  0.12 
BOLT 
2.12 
LOWER  THREADED 
TORSION  BUSHING 
LINK  NOTE:____ DIMENSIONS ARE IN INCHES. 
HANDLE 
A-A  B-B 
Torsion Links Installation 
Figure 402 

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 S 864-015
 WARNING: MAKE SURE THAT YOU INSTALL THE DOOR LOCK OF THE NOSE LANDING
_______ GEAR. ALSO, MAKE SURE THAT THE GROUND DOOR RELEASE HANDLE OF THE NOSE LANDING GEAR IS IN THE OPEN POSITION. AND, MAKE SURE THAT THE CONTROL HANDLE OF THE LANDING GEAR IS IN THE DOWN POSITION. ACCIDENTAL HYDRAULIC PRESSURE CAN CAUSE THE DOORS TO CLOSE QUICKLY WHICH CAN CAUSE INJURY TO PERSONS.
 (6)  
Supply hydraulic power to system No. 1 (AMM 29-11-00/201).

 S 874-016

 (7)  
Operate the steering system of the nose gear through 5 full cycles to bleed the hydraulic system of the nose gear steering.

 S 794-017

 (8)  
Do a check of the steering metering valve for leakage.

 G.
Put the Airplane in its Usual Condition

 S 864-018
 (1)  
Close 7G23 BODY GR STRG ARM AC circuit breaker on the P7 Overhead Circuit Breaker Panel.

 S 864-019

 (2)  
Close 7G24 BODY GR STRG ARM DC circuit breaker on the P7 Overhead Circuit Breaker Panel.

 S 864-020

 (3)  
Remove hydraulic power of system No. 1 (AMM 29-11-00/201).

 S 414-021
 CAUTION:_______DO NOT LET THE TORSION LINK FALL. IF THE TORSION LINK FALLS, DAMAGE TO THE MOUNTING BRACKET OF THE SQUAT SWITCH CAN OCCUR.
 (4)  
Install the apex bolt of the torsion link of the nose landing gear (Fig. 402).

 (a)  
Remove the hold tool from the torsion link.

 (b)  
Put the upper end of the torsion link in the lower end of the torsion link fork.

 (c)  
Lubricate the apex bolt shank and the threads with grease.

 (d)  
Install the apex bolt and the screw in the bushing with threads. 1) Tighten the bolt hand tight and install the quick-release

 pin.
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