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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
3) Install the small end of the lever arm (Part 1) into the free end of the reversible extension assembly.
(d) Install the push and pull gage at the BLUE location on the lever arm (Part 1).
S 226-043
(12)
Measure the play.
(a)
Apply a 50 |10 pound force in a left hand or right hand direction to the push and pull gage.
(b)
Set the dial indicator to zero.
(c)
Apply the same force in the opposite direction to the push and pull gage.
(d)
Write the reading from the dial indicator.
(e)
Release the loading force.
S 436-046
(13)
If the torsional play is 0.19 inch or more, replace the torsion link bushings and the torsion link parts.
S 966-078
(14)
Replace the bushings in the inner clyinder and steering collar that connect to the torsion links.
S 226-045
(15)
Do a second play check and write the indication from the dial indicator.
S 436-044
(16)
If the torsional play stays more than 0.19 inch, replace the steering actuators or other components.
F.
Put the airplane back to its usual condition.
(1)
Remove the torsional play tool.
(2)
Remove the tow pin (AMM 09-11-00/201).
(3)
Remove the axle jack.
S 096-017
S 096-020
S 946-021
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747-400 MAINTENANCE MANUAL
S 946-048
(4)
Remove the jack attached tool from the bottom of the nose gear axle.
S 586-022
(5)
Lower the nose of the airplane (AMM 07-11-02/201).
(a)
Remove the fuselage jack.
S 616-023
(6) Do a servicing on the shock strut (AMM 12-15-05/301).
S 096-054
WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASK BELOW TO REMOVE THE
_______ DOOR LOCKS FROM THE LANDING GEAR DOORS. THE DOORS CAN CLOSE QUICKLY IF YOU DO NOT REMOVE THE DOOR LOCKS CORRECTLY. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(7) Remove the door locks for the nose landing gear if no more work on the airplane is necessary (AMM 32-00-30/201).
TASK 32-21-03-206-025
3. Worn Area Examination Of the Torsion Link Bushings, the Pins And the Bolts__________________________________________________________________________ (Fig. 602).
A. Standard Tools and Equipment
(1)
Micrometers - inside and outside measuring
B.
References
(1)
AMM 32-21-03/401, Nose Gear Torsion Links
(2)
AIPC 32-21-03 Fig. 1
C.
Access
(1)
Location Zone
715 Nose Landing Gear
D.
Procedure
S 026-026
(1) Remove the torsion links for the nose landing gear
(AMM 32-21-03/401).
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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747-400
MAINTENANCE MANUAL
SEE A
A
A
B
FWD
B
A
A
A
Wear Limits of the Torsion Links for the Nose Landing Gear
Figure 602 (Sheet 1)
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