(d)  
Install the clamps (14 and 15) around the actuator.

 (e)  
Install the clamps so that they cover the flanges on the cable support (13).

 (f)  
Tighten the clamps to 15-20 pound-inches torque.

 G.  
Perform Leakage Test

 S 012-013
 (1)  Disconnect the nose gear torsion links at the apex (AMM
 32-21-03/201).

 S 862-014
 CAUTION: FAILURE TO OPEN THE FOLLOWING CIRCUIT BREAKERS BEFORE
_______ PERFORMING THE FOLLOWING PROCEDURES CAN RESULT IN DAMAGE TO THE EQUIPMENT OR EXCESSIVE EQUIPMENT OPERATING TIME.
 (2)  
Open the 7G23 BODY GR STRG ARM AC circuit breaker on the P7 Overhead Circuit Breaker Panel.

 S 862-015

 (3)  
Open the 7G24 BODY GR STRG ARM DC circuit breaker on the P7 Overhead Circuit Breaker Panel.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 862-016
 WARNING:_______ MAKE SURE THAT THE NOSE GEAR DOOR LOCK IS INSTALLED AND THAT
 THE NOSE GEAR GROUND DOOR RELEASE HANDLE IS IN THE DOWN AND
 LOCKED POSITION.  MAKE SURE THAT THE LANDING GEAR CONTROL
 HANDLE IS IN THE DOWN POSITION.  INADVERTENT APPLICATION OF
 HYDRAULIC PRESSURE CAN CAUSE THE DOORS TO CLOSE RAPIDLY AND
 CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.

 WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF ALL CONTROL
_______ SURFACES BEFORE YOU SUPPLY HYDRAULIC POWER. AILERONS, RUDDERS, ELEVATORS, FLAPS, SPOILERS, LANDING GEAR, AND THRUST REVERSERS CAN MOVE QUICKLY WHEN YOU SUPPLY HYDRAULIC POWER. THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
 (4)  Do this task: "Supply No. 1 System Hydraulic Power" (AMM 29-11-00/201).
 NOTE: Do not use the No. 1 hydraulic system aux pump to bleed the
____ nose gear steering actuator. The No. 1 system aux pump does not produce enough volume to make sure of an adequate bleed.
 S 872-017
 (5)  
Bleed the nose gear steering hydraulic system by cycling nose gear thru 5 complete cycles.

 S 792-018

 (6)  
Do a leak check of the steering cylinders.

 (a)  
Turn the captain's tiller from neutral to left (counterclockwise) until the tiller stop is contacted and hold.

 (b)  
Do a check of the steering cylinder for leakage.

 (c)  
Turn the captain's tiller to the right (clockwise) until the tiller stop is contacted and hold.

 (d)  
Do a check of the steering cylinder for leakage.

 (e)  
Return the tiller to the neutral position.

 S 862-019
 (7)  
Close the 7G23 BODY GR STRG ARM AC circuit breaker on the P7 Overhead Circuit Breaker Panel.

 S 862-020

 (8)  
Close the 7G24 BODY GR STRG ARM DC circuit breaker on the P7 Overhead Circuit Breaker Panel.

 (9)  
Remove system No. 1 hydraulic power (AMM 29-11-00/201).

 S 862-021
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 012-022
 (10) Connect the nose gear torsion links at the apex (AMM 32-21-03/201).
 S 092-023
 WARNING: REFER TO AMM 32-00-30/201 FOR THE LOCK REMOVAL PROCEDURE.
_______ RAPID ACTION OF THE DOORS MAY INJURE PERSONNEL OR DAMAGE EQUIPMENT.
 (11) Remove the nose gear door lock if it is no longer necessary (AMM 32-00-30/201).
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