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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 747-400 MAINTENANCE MANUAL
(b) Pull the lever off the shaft. 1) If you cannot easily pull the lever off the shaft because the pushrod holds it, remove the lever. a) Remove the bolt (3), bushing (4), washer (5) and nut (6). b) Move the pushrod away from the lever. c) Remove the lever (8 left, 7 right).
(2) S 034-008Disconnect the hydraulic lines from the valve assembly.
(3) S 494-009Install a cap or plug on all open lines and ports.
(4) S 024-048Remove the valve assembly (1 left, 2 right): (a) Hold the valve assembly. (b) Remove four nuts (35), washers (34) and bolts (33) that attach the valve assembly to the quadrant support assembly. (c) Remove the valve assembly from the airplane.
(5) S 934-059Make marks or notes to show the position of the adapters that have angles.
NOTE:____ This is necessary to correctly install the adapters.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 034-013
(6)
Remove these parts from the valve assembly:
(a)
LEFT VALVE ASSEMBLY (1);
Refer to the table that follows. ~............................................................... | Port:| BRAKE A: |Adapter (29), Nut (28), O-Ring (25), | | | |Backup Ring (26), Packing (24) | ................................................................. | | PRESS A: |Filler Fitting (23), Packing (14), Backup | | | |Ring (16), O-Ring (13) | ................................................................. | | BRAKE B: |Adapter (31), Nut (15), Packing (25), | | | |Backup Ring (26), O-Ring (24) | ................................................................. | | PRESS B: |Filler Fitting (24), Packing (14), Backup | | | |Ring (16), O-Ring (13) | ................................................................. | | PRESS C: |Adapter (18), Nut (21), Packing (20), | | | |Backup Ring (22), O-Ring (19) | ................................................................. | | RET A: |Adapter (17), Nut (15), O-Ring (14), | | | |Backup Ring (16), Packing (13) | ................................................................. | | RET B: |Adapter (12), Nut (15), O-Ring (14), | | | |Backup Ring (16), Packing (13) | 2......…..........….............................................1
(b)
RIGHT VALVE ASSEMBLY (2);
Refer to the table that follows. ~............................................................... | Port:| BRAKE A: |Adapter (29), Nut (28), O-Ring (25), | | | |Backup Ring (26), Packing (24) | ................................................................. | | PRESS A: |Filler Fitting (23), O-Ring (16), Backup Ring| | | |(14), O-Ring (13) | ................................................................. | | BRAKE B: |Adapter (30), Packing (25), Backup Ring (26),| | | |O-Ring (24) | ................................................................. | | PRESS B: |Filler Fitting (23), Packing (14), Backup | | | |Ring (16), O-Ring (13) | ................................................................. | | PRESS C: |Adapter (18), Nut (21), O-Ring (20), | | | |Backup Ring (22), Packing (19) | ................................................................. | | RET A: |Adapter (17), Nut (15), O-Ring (14), | | | |Backup Ring (16), Packing (13) | ................................................................. | | RET B: |Adapter (12), Nut (15), O-Ring (14), | | | |Backup Ring (16), Packing (13) | 2......…..........….............................................1
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A
747-400 MAINTENANCE MANUAL
S 964-038
(7)
Discard the O-rings and the backup rings.
S 494-015
(8)
Install plugs in the ports of the valve assembly.
TASK 32-41-03-404-016
3. Brake Metering Valve Assembly Installation (Fig. 401)__________________________________________
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