S 862-004

 (5)  
For removal of the alternate sensor, open this circuit breaker on the P7 Overhead Circuit Breaker Panel and install a DO-NOT-CLOSE tag:

 (a)  
7F23, LANDING GEAR DSP & CONT ALTN

 S 862-005
 (6)  
For removal of the primary sensor, Open this circuit breaker on the P7 Overhead Circuit Breaker Panel and install a DO-NOT-CLOSE tag:

 (a)  
7F22, LANDING GEAR DSP & CONT PRI

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A
747-400 MAINTENANCE MANUAL
 E. Remove the Lock Sensor
 S 032-038
 (1)  
Disconnect the sensor wires:

 (a)  
Remove the sealant material from the electrical terminals on the terminal strip with the plastic scraper.

 (b)  
Make a record of the terminal and color of wires (Ref WDM 32-61-13 primary sensor, WDM 32-61-22 alternate sensor).

 (c)  
Remove the nut (11), the lock washer (10), and the washer (9).

 (d)  
Carefully remove terminal lugs (7) from the sensor wires.

 (e)  
Attach a line that is longer than the conduit to the sensor wires.

 NOTE: You will use this line to pull the sensor wires through
____ the conduit, during the installation.
 S 022-010
 (2)  
Remove the lock sensor (2).

 (a)
Remove the nut (6), screw (1), and washer (5).

 TASK 32-61-03-402-011
 3. Nose Gear Lock Sensor Installation (Fig. 201)
__________________________________
 A. Consumable Materials
 (1)  
A00247 Sealant - Chromate, BMS 5-95

 B.
Parts

 ~.............................................................................. | AMM | | AIPC | ................. ............................ | FIG | ITEM | NOMENCLATURE | SUBJECT | FIG | ITEM | ................................................................................ | 202 | 1 |Screw | 32-61-08 | 12 | 60 | | | 2 |Proximity Switch Sensor (lock | | | 50 | | | | sensor) | | | | | | 3 |Shim | | | 55 | | | 4 |Bracket Assembly | | | 45 | | | 5 |Washer | | | 30 | | | 6 |Nut | | | 65 | | | 8 |Shear Pin | 32-34-02 | 02 | 70 | | | 9 |Washer | 32-61-70 | 05 | 137 | | | 10 |Lock Washer | | | 138 | | | 11 |Nut | | | 139 | 2......…........…...................................…..........…......…........1
 C. References
 (1)  
AMM 09-11-00/201, Towing

 (2)  
AMM 32-00-30/201, Landing Gear Door Locks

 (3)  
AMM 32-09-02/201, Air/Ground Relay System

 (4)  
AMM 32-61-00/501, Landing Gear Position Indication System

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747-400
MAINTENANCE MANUAL

 (5)  
IPC 32-61-08 Fig. 12

 (6)  
IPC 32-61-70 Fig. 5

 (7)  
WDM 32-61-13

 (8)  
WDM 32-61-22

 D.
Access

 (1)  
Location Zone
 114 Nose Gear Wheel Well - RH
 715 Nose Landing Gear

 E.
Prepare for the Installation

 S 092-040
 WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASK BELOW TO INSTALL
_______ THE STEERING LOCKOUT PIN (AMM 09-11-00/201). THE NOSE WHEEL CAN ACCIDENTALLY TURN AND CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (1)  
Make sure the steering lockout pin is installed (AMM 09-11-00/201).

 F.
Install the Lock Sensor

 S 432-016
 (1)  
Twist the sensor leads and attach the line installed in the sensor removal procedure.

 S 432-067

 (2)
Carefully pull the wires through the conduit and remove the line.
　
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