(3)
Do this task: "Installation of the Door Locks on the Body Landing Gear" (AMM 32-00-30/201).
S 864-004
(4)
Remove the pressure from hydraulic systems No. 1 and No. 4 (AMM 29-11-00/201). S 864-060 WARNING:_______DO NOT LOOSEN OR REMOVE THE VALVE BODY UNDER PRESSURE. THE
VALVE CAN BLOW OUT CAUSING INJURY TO PERSONNEL. 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.
(5) Release the air pressure from the shock strut by removing the cap from the air charging valve and loosening the outer nut not more than two turns.
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AIR CHARGING VALVE
A
A
747-400 MAINTENANCE MANUAL
WHEEL WELL CONNECTION CONDUIT BOX
SEE D
DRAG STRUT SIDE BRACE
SHOCK STRUT
Body Landing Gear Installation
Figure 401 (Sheet 1)
RETRACT
ACTUATOR
CONDUIT
SEE A
SEE B
SEE C
RETRACT
ACTUATOR
HYDRAULIC UNIONS
SHOCK
STRUT
B
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
SHOCK STRUT
STEERING
YOKE
STEERING
CYLINDERS
OLEO
LOCK
LOWER
TORSION LINK
WHEEL WELL
CONNECTION BOX
J15(LH)
TRUCK J17(RH)
PIVOT
OLEO LOCK INSTALLATION
C
UPPER RIGID
CONDUIT
CLAMP
X
Y
FACE OF
OUTBOARD
TRUNNION
SUPPORT
SIDE
BRACE
D
Body Landing Gear Installation
Figure 401 (Sheet 2)
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A
747-400
MAINTENANCE MANUAL
S 864-061
(6) When air ceases to flow from the valve, replace the cap.
NOTE: The fluid in the shock strut will start foaming immediately
____ as the pressure is reduced to ambient. Deflate the shock strut slowly to prevent the loss of fluid through the air valve.
S 494-006
(7) Install the shock strut retention tool (OLEO LOCK) on the gear.
S 584-007
WARNING: MAKE SURE THE STRUT IS FULLY DEPRESSURIZED BEFORE JACKING.
_______ FAILURE TO DO THIS CAN LET THE STRUT MOVE UNDER PRESSURE AND CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
WARNING: THE AIRPLANE WEIGHT MUST BE REMOVED FROM THE GEAR TO PRECLUDE
_______ INADVERTENT GEAR ROTATION FORWARD AROUND THE TRUNNION WHICH WILL DRIVE THE DRAG STRUT/JURY STRUT INBOARD RESULTING IN POSSIBLE PERSONNEL INJURY.
(8)
Do this task: "Jack Airplane" (AMM 07-11-01/201) until weight is off wheels.
S 034-008
(9)
Do this task: "Body Landing Gear Truck Positioning Actuator Removal" (AMM 32-13-15/401).
S 494-009
(10)
Install body gear strut vertical stabilizer.
F.
Remove Body Landing Gear (Fig. 402)
S 864-010
(1)
Remove electrical power (AMM 24-22-00/201).
S 034-011
(2)
Disconnect the electrical conduit from the wheel well connection box (Detail D, Fig. 401).
NOTE: The conduit running down the jury strut to the sensors may be
____
left intact.
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