(a)
At the free end of the dial indicator bracket, attach the dial indicator.
(b)
Put the dial indicator needle on top of the torque box. The movement of the dial will indicate that the pivot fitting has moved vertically in relation to the airplane structure.
S 984-012
(8) Operate the horizontal stabilizer jacking equipment until you can move the pivot pin. Stop the operation when the dial indicator needle starts to move.
NOTE: Movement of the needle shows that the stabilizer does
____ not have a load and that the pivot fitting has moved. This will permit you to remove the pin more easily.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
E. Procedure S 224-061
(1) Before you remove any components, measure the distance "G" between the inboard face of the pivot fitting (Fig. 401) and make a record of the location and the dimension.
NOTE: After you install the pivot pin assembly, you will measure
____ the same distance "G" at the same location. You will compare the before and after dimension.
S 024-015
(2)
Remove the cotter pin (11).
S 024-016
(3)
Remove the nut (10) and washer (9).
S 024-017
(4)
Remove the anti-rotation plate (8).
S 024-018 CAUTION: WHEN YOU REMOVE THE TRAP FITTING (18) AND THE INTERNAL LOCK
_______ BOLT (4), DO NOT REMOVE THE COTTER PIN (1). IF YOU REMOVE THE COTTER PIN (1) YOU WILL NOT KEEP THE CORRECT ADJUSTMENT.
(5)
Remove the trap fitting (18) and the internal lockbolt (4) together. S 024-019
(6)
Remove the inner pivot pin (14).
S 024-020
(7)
Remove the nut (2).
S 024-021
CAUTION:_______BE CAREFUL WHEN YOU REMOVE THE OUTER PIVOT PIN (16). THE THREADS ON THE ON THE OUTTER PIVOT PIN (16) CAN EASILY CAUSE DAMAGE TO THE PIVOT FITTING BEARING (5) INNER MYCARTA LINER SURFACE.
(8) Carefully remove the outer pivot pin (16) and washers (15). NOTE: When you remove the outer pivot pin (16), the washers (15)
____
can fall on the ground.
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55-17-51
ALL ú ú 01 Page 406 ú Oct 10/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
TASK 55-17-51-404-013
3. Pivot Pin Installation______________________
A. General
(1) The wear limits for the pivot pin components are in AMM 27-41-02/601.
B. Equipment
(1)
Dial Indicator - Commercially available
(2)
Horizontal Stabilizer Jacking Equipment,
Customer supplied.
(3)
Service Platform, Service Access Door -
C. Consumable Materials
(1)
C00913 Corrosion Preventative Compound - BMS 3-27
(2)
D00013 Grease - BMS 3-24
(3)
A00247 Sealant, Chromate Type - BMS 5-95, Type I,
Class B or C
D. References
(1) 06-09-05/201, Empennage Access Doors and Panels
E. Access
(1)
Location Zones 311/312 Area Aft of the Pressure Bulkhead to Sta 2598
(2)
Access Panel
312AR Service Access Door
F. Procedure
S 644-024
(1) Apply grease to the washers (15) and to the outer pivot pin (16).
S 644-076
CAUTION:_______BE CAREFUL WHEN YOU INSTALL THE OUTER PIVOT PIN (16). THE THREADS ON THE ON THE OUTTER PIVOT PIN (16) CAN EASILY CAUSE DAMAGE TO THE PIVOT FITTING BEARING (5) INNER MYCARTA LINER SURFACE.
(2)
Apply grease to the pivot pin screw (12).
(3)
Install the outer pivot pin (16) into the pivot pin screw (12).
(4)
Hold the one washer (15) in place.
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