(3)  
D00013 Grease - MIL-G-23827 (optional)

 C.
References

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

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747-400
MAINTENANCE MANUAL

 (2)  
AMM 09-11-00/201, Towing

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

 (4)  
AMM 32-21-03/401, Nose Gear Torsion Links

 (5)  
IPC 32-61-58 Fig. 1

 D.
Access

 (1)  
Location Zone
 715 Nose Landing Gear

 E.
Prepare for the Installation

 S 492-048
 WARNING: MAKE SURE THE GROUND LOCKS AND THE STEERING LOCKOUT PIN IS
_______ INSTALLED ON THE NOSE GEAR. AN ACCIDENTAL RETRACTION OF THE LANDING GEAR OR TURN OF THE NOSE WHEEL CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (1)  
Make sure the ground locks and steering lockout pin are installed on the nose gear (AMM 09-11-00/201).

 F.
Install the Squat Sensor Target

 S 432-051
 (1)  
Do these steps to install the squat sensor target:

 (a)  
Install the bracket assembly to the upper torsion link with the two bolts, the four washers and the two nuts.

 CAUTION: MAKE SURE YOU USE THE HOLDING TOOL FOR THE TORSION LINK
_______ WHEN YOU REMOVE THE APEX PIN. IF THE TORSION LINK FALLS, YOU CAN CAUSE DAMAGE TO THE MOUNTING BRACKET FOR THE SQUAT SWITCH.
 (b)  Remove the apex pin assembly for the torsion link. 1) Hold the torsion link with the holding tool. 2) Push the button and pull the pin out from the apex bolt
 end.
 NOTE: The apex pin uses a quick-release ball-type
____ mechanism to lock.
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747-400 MAINTENANCE MANUAL
 3) Remove the apex pin bolt from the threaded bushing. 4) Remove the holding tool for the torsion link.
 (c)  
Install the shim and attach the sensor target assembly to the bracket assembly with a clamp.

 (d)  
Drill from the pilot holes through the bracket assembly and countersink the holes.

 (e)  
Lower the upper torsion link until the bracket assembly is below the squat sensor.

 (f)  
Remove the necessary laminations from the shim between the target and the target bracket assembly to get the correct clearance (Fig. 201).

 (g)  
Attach the shim to the bracket assembly with the sealant.

 (h)  
Install the rivets to hold the target assembly to the bracket assembly.

 (i)  
Install the apex pin assembly for the torsion link. 1) Put the end of the upper torsion link into the end fork of the lower torsion link (AMM 32-21-03/401).

 2)  If it is necessary, lift the nose gear axle with a jack to put the torsion link ends in the correct position (AMM 07-11-03/201).
 3)  Lubricate the surface of the apex bolt shank with the
 grease. 4) Install the apex bolt into the threaded bushing. 5) Tighten the apex bolt by hand and install the ball-type
 quick-release pin.
 (j)  
Install the elastic bumper and the angle plate.

 (2)  
Do the ground test of the PSEU (AMM 32-09-03/501).

 S 742-034
 S 492-052
 WARNING:_______DO THE PROCEDURE FOR THE DOOR LOCK REMOVAL. FAST MOVEMENT OF THE DOORS FOR THE NOSE LANDING GEAR CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (3)  Remove the door lock on the nose gear door (AMM 32-00-30/201).
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 32-61-01
　
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