32-51-00
 ALL  ú ú 03 Page 501 ú Oct 10/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 B.  Special Tools and Equipment
 (1)  
G12001 - Rigging Pins
 ~.......................................................
 | | | G12001 |
 | Rigging Pin No. | Length (inches) | Dash Number |
 .........................................................
 | NS-1 | 4.00 | 15 |
 .........................................................
 | NS-2 | 4.00 | 15 |
 .........................................................
 | NS-3 | 6.00 | 19 |
 .........................................................
 | NS-4 | 2.50 | 13 |
 .........................................................
 | NS-5 | 4.00 | 15 |
 .........................................................
 | NS-6 | 2.50 | 5 |
 .........................................................
 | R-3 | 3.50 | 15 |
 2..................…....................…...............1

 (2)  
8ME65B01202-1 - Torsion Link Holding Tool

 C.  
Standard Tools and Equipment

 (1)  
Cable tensiometer - 0 to 300-pound range for 3/32- and 1/8-inch diameter cable

 D.  
Consumable Materials

 (1)  
D00633 Grease - BMS 3-33 (preferred)

 (2)  
D00013 Grease - MIL-G-23827 (optional)

 E.  
References

 (1)  
AMM 09-11-00/201, Towing

 (2)  
AMM 27-21-00/501, Rudder and Rudder Trim Control System

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

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

 (5)  
AMM 32-50-00/600 Steering - Inspection/Check

 (6)  
AIPC 32-21-03 Fig. 1, AIPC 32-51-60 Fig. 1, AIPC 32-51-61 Fig. 1, AIPC 32-51-63 Fig. 1

 F.  
Access

 (1)  
Location Zone 117 Electrical and Electronics Compartment, LH (Rig pin NS-4) 211 Passenger Cabin - Nose to First Door (Rig pin NS-3, R-3) 221 Control Cabin, LH (Rig pin NS-1) 222 Control Cabin, RH (Rig pin NS-2) 715 Nose Landing Gear (Rig pin NS-5, NS-6)

 G.  
Prepare to Adjust Nose Wheel Steering System

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 32-51-00
 ALL  ú ú 02 Page 502 ú Oct 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 865-112
 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).

 S 015-113

 (2)  
Do this task: " Nose Gear Door Operator Rods Disconnection" (AMM 32-00-30/201).

 S 865-141

 (3)  
Open the following circuit breakers:

 (a)  
7G23 BODY GR STRG ARM AC

 (b)  
7G24 BODY GR STRG ARM DC

 S 015-004
 CAUTION: RESTRAIN THE TORSION LINK FROM DROPPING OR DAMAGE TO THE
_______ SQUAT SWITCH MOUNTING BRACKET MAY RESULT.
 (4)  
Remove the nose gear torsion link apex bolt (Fig. 503).

 (a)  
Press the button and pull out the quick-release pin from the apex bolt.

 (b)  
Unscrew the apex bolt from the threaded bushing and pull it out.

 S 985-005
 (5)  Manually move the upper link (restrained) through its arc to establish that an adequate clearance exists between the link and the P37 panel or the runway turnoff light housing.
 S 495-131
 CAUTION:_______ DO NOT HOLD THE UPPER TORSION LINK TOO HIGH WITH THE
 HOLDING TOOL.  THE UPPER TORSION LINK CAN TURN AND HIT THE
 TURNOFF LIGHT HOUSING WHEN YOU MOVE THE STEERING TILLER.  THIS
 CAN CAUSE DAMAGE TO THE TURNOFF LIGHT HOUSING.

 CAUTION: RESTRAIN THE TORSION LINK FROM DROPPING OR DAMAGE TO THE
_______ SQUAT SWITCH MOUNTING BRACKET MAY RESULT.
 (6)  
Install the torsion link holding tool. S 845-007
　
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