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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.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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本文链接地址：747-400 AMM 飞机维护手册 起落架 LANDING GEAR 8(48)
