E.
Prepare for the Procedure
S 492-096
WARNING: YOU MUST CAREFULLY INSTALL THE GROUND LOCKS IN ALL LANDING
_______ GEAR. AN ACCIDENTAL RETRACTION OF THE LANDING GEAR CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
(1) Install the ground locks on all landing gear (Ref 09-11-00/201).
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747-400 MAINTENANCE MANUAL
S 492-097
WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASKS BELOW TO INSTALL
_______ THE DOOR LOCKS ON THE LANDING GEAR DOORS. THE DOORS CAN CLOSE QUICKLY IF YOU DO NOT INSTALL THE DOOR LOCKS CORRECTLY. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(2)
Do this task: "Installation of the Door Locks on the Wing Landing Gear" (Ref 32-00-30/201).
S 492-098
(3)
Do this task: "Installation of the Door Locks on the Body Landing Gear" (Ref 32-00-30/201).
F.
Procedure
S 862-026
(1)
Close the shutoff valve (9) with a 3/16-inch hex wrench.
S 872-099
(2)
Use the oil fill valve to bleed the pressure from the tube between the pressure gage and the shutoff valve (9).
NOTE: Use a small container to catch all fluid when it comes
____
through the oil fill valve.
S 032-100
(3)
Remove the oil fill valve from the pressure gage assembly (3).
S 482-101
(4)
Attach a calibrated pressure gage to the oil fill valve port.
NOTE: Use the pressure gage on the servicing cart.
____
S 862-102
(5)
Open the shutoff valve (9) with a 3/16-inch hex wrench.
S 782-103
(6)
Compare the indication of the pressure (3) gage on the shock strut to the indication on the servicing cart gage.
NOTE: If the pressure difference is 50 psig or more, replace the
____
pressure gage on the shock strut.
S 172-030
(7)
If the two gages (3) show the same pressure, flush the clogged flow fuse.
(a)
Close the shutoff valve (9) with a 3/16-inch hex wrench.
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MAINTENANCE MANUAL
(b)
Disconnect the pressure gage on the servicing cart from the oil fill valve port.
(c)
Install the oil fill valve (4) in the pressure gage assembly (3).
(d)
Install a lockwire from the oil fill valve (4) to the tube connection.
CAUTION: REMOVE THE PRESSURE FIRST FROM THE WING LANDING GEAR OR
_______ REMOVE IT EQUALLY FROM ALL OF THE MAIN LANDING GEAR. THE AIRPLANE CAN FALL TO THE SIDE IF YOU REMOVE THE PRESSURE INCORRECTLY.
CAUTION: BEFORE YOU DEFLATE THE STRUT MAKE SURE THAT THE AREA BELOW
_______ THE WING IS CLEAR. WHEN YOU DEFLATE THE STRUT THE WING CAN LOWER MANY FEET, WHICH CAN CAUSE DAMAGE TO THE EQUIPMENT.
(e) Release the pressure from the shock strut.
1) Remove the cap from the air valve at the top of the shock strut.
WARNING: DO NOT REMOVE THE VALVE ASSEMBLY UNTIL YOU FULLY RELEASE
_______ THE PRESSURE IN THE SHOCK STRUT. INTERNAL PRESSURE CAN BLOW THE VALVE FROM THE STRUT. THIS CAN CAUSE INJURY TO PERSONS.
CAUTION:_______LET THE AIR OUT OF THE STRUT SLOWLY. IF YOU LET THE AIR OUT OF THE STRUT QUICKLY, THE FLUID WILL COME THROUGH THE AIR VALVE. IF THE FLUID GETS ON THE TIRES AND OTHER SURFACES, IT CAN CAUSE DETERIORATION.
2) Slowly loosen the outer nut on the air valve to a maximum of two turns.
NOTE: Bubbles will come out of the air valve immediately
____
after you loosen the outer nut.
(f)
Remove the pressure cap (5) from the oil fill valve (4).
(g)
Attach the hydraulic fluid line to the oil fill valve (4).
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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(137)
