32-11-31
ALL ú ú 01 Page 401 ú Oct 10/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
SEE A
UPPER SEAL REPLACEMENT TOOL
VALVE MOUNTING NUT
AIR CHARGING VALVE
T-RING SEAL
O-RING SEAL
UPPER BULKHEAD AIR VALVE ADAPTER
WING GEAR SHOCK STRUT
A
Wing Gear Air Charging Valve InstallationFigure 401
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
32-11-31
ALL ú ú 01 Page 402 ú Oct 10/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
S 494-037
(3)
Do this task: "Installation of the Door Locks on the Body Landing Gear" (Ref 32-00-30/201).
S 844-004
(4)
Decrease the pressure from the hydraulic system No. 4
(Ref 29-11-00/201).
E.
Remove the Air Charging Valve and Seal
S 844-005
WARNING: YOU MUST FULLY DEFLATE THE SHOCK STRUT BEFORE YOU REMOVE THE
_______ VALVE BODY. INTERNAL PRESSURE CAN BLOW THE VALVE OUT THAT CAN CAUSE INJURY TO PERSONS.
CAUTION: BEFORE YOU DEFLATE THE STRUT MAKE SURE THAT THE AREA BELOW THE
_______ WINGS IS CLEAR. WHEN YOU DEFLATE THE STRUT THE WING CAN LOWER MANY FEET, WHICH CAN CAUSE DAMAGE TO THE EQUIPMENT.
(1) Remove the air charging valve cap on the shock strut to release the pressure.
NOTE: When you decrease the pressure to ambient, the fluid in the
____ shock strut will start to foam immediately.
(a)
Loosen the outer nut to a maximum of two turns.
(b)
Deflate the shock strut slowly to prevent the loss of fluid through the air valve.
S 494-006
(2)
Lower the truck into pit or lift the airplane (Ref 07-11-01/201) until you get a minimum of 6 inches of chrome plating.
S 494-007
(3)
Install the upper seal replacement tool in the upper bulkhead.
S 034-008
(4)
Remove the mounting nut from the air valve adapter.
S 034-009
(5)
Remove the upper bulkhead nut and the lower upper bulkhead into the outer cylinder.
NOTE: It is possible to remove and disassemble the shock strut
____ if you let the bulkhead to fall into the shock strut.
(a) Make sure that the bulkhead does not fall into the shock strut.
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32-11-31
ALL ú ú 01 Page 403 ú Feb 15/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 024-010
(6)
Remove the adapter on the air charging valve through the upper bulkhead opening and remove the seal.
(a)
Make sure that the adapter does not fall into the shock strut.
TASK 32-11-31-404-011
3. The Charging Valve and Seal Installation on the Shock Strut of the Wing_______________________________________________________________________ Landing Gear (Fig. 401)____________
A. Special Tools and Equipment
(1)
MIT65B18211 - Upper Seal Replacement Tool
(2)
19MIT65B01211-1 - Torque Adapter
B.
Consumable Materials
(1)
C00308 Corrosion Preventive Compound, Class I - MIL-C-11796
(2)
D00106 Hydraulic Fluid - MIL-H-6083
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本文链接地址：747-400 AMM 飞机维护手册 起落架 LANDING GEAR 2(66)
