S 612-023
(3)
Inflate the shock strut of nose landing gear with the correct servicing fluid. Do the steps that follow:
(a)
Close the air-charge valve of the shock strut.
(b)
Attach the oil charge line to the oil charge valve of the shock strut and open the valve.
WARNING:_______DO NOT INFLATE THE SHOCK-STRUT TO MORE THAN 2000 PSI. IF THE SHOCK STRUT IS INFLATED TO MORE THAN 2000 PSI, INJURY TO PERSONS CAN OCCUR. DAMAGE TO THE NOSE LANDING GEAR CAN ALSO OCCUR.
CAUTION: DO NOT INFLATE THE NOSE GEAR SHOCK-STRUT TO AN "A"
_______ DIMENSION MORE THAN 18 INCHES. IF THE "A" DIMENSION IS MORE THAN 18 INCHES, DAMAGE TO THE SEALS CAN OCCUR.
(c) Put the correct servicing fluid into the shock strut with a pump. Do this until it is extended to the 18 inch "A" dimension.
NOTE: Shock strut "A" dimension charts are found in chapter
____
AMM 12-15-02/301.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
07-11-02
ALL ú ú 01 Page 203 ú Sep 28/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757 MAINTENANCE MANUAL
(d) Close the oil charge valve of the shock strut.
S 082-022
(4) To lift the airplane nose, do the steps that follow:
(a)
Put wheel chocks on all main landing gear wheels.
(b)
Set the load relief cell on the jack to 28,000 pounds.
(c)
Put the jack directly below the jack pad at jack point A (Fig. 201).
(d)
Make sure that the jack is level and in the center of the jack adapter.
(e)
Operate the jack to seat the jack in the jack adapter. Refer to the jack manufacturers' instructions.
CAUTION: DO NOT LIFT THE NOSE OF THE AIRPLANE TO MORE THAN SIX
_______ INCHES OF TIRE CLEARANCE. IF YOU LIFT THE NOSE HIGHER, SIDE LOADS THAT ARE MORE THAN DESIGN LOAD LIMITS CAN OCCUR. THIS CAN CAUSE DAMAGE TO THE JACK RAM AND JACK ADAPTER BECAUSE THEY WILL MOVE IN AN ARC.
(f) Lift the airplane nose to the necessary height.
H. Lift the Airplane Nose with the Shock Strut Restraint and the Nose Jack
S 822-013
(1) Center the nose landing gear.
S 862-014
CAUTION: CLEAR THE AREA BELOW THE AIRPLANE OF ALL EQUIPMENT BEFORE THE
_______ SHOCK STRUT IS DEFLATED. WHEN YOU DO NOT CLEAR THE AREA, DAMAGE TO THE AIRPLANE OR TO THE EQUIPMENT CAN OCCUR.
(2) Deflate the nose landing gear shock strut (AMM 12-15-02).
S 492-015
CAUTION: DO NOT USE THE SHOCK STRUT RESTRAINT ON INFLATED SHOCK STRUTS.
_______
THE RESTRAINT HAS A LOAD LIMIT.
(3) Install the shock strut restraint.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
07-11-02
ALL ú ú 01 Page 204 ú Sep 28/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757 MAINTENANCE MANUAL
S 582-016
(4) To lift the airplane nose, do the steps that follow:
(a) Put wheel chocks on all main landing gear wheels.
CAUTION: LET THE AIRPLANE ROLL FORWARD/AFT WHILE THE AIRPLANE NOSE
_______ IS LIFTED WITH THE JACK. WHEN YOU DO NOT LET THE AIRPLANE ROLL, DAMAGE CAN OCCUR TO THE MAIN LANDING GEAR OR TO THE AIRPLANE STRUCTURE.
(b)
Make sure that the wheel chocks do not touch the wheels of the main landing gear. This is to permit forward/aft movement of the wheels while the airplane is lifted with the jack.
(c)
Make sure that the parking brake is released and the manual brake is not applied during the procedure.
(d)
Put the jack directly below the jack pad at jack point A (Fig. 201).
(e)
Make sure that the jack is level and in the center of the jack adapter.
(f)
Operate the jack to seat the jack in the jack adapter. Refer to the jack manufacturers' instructions.
中國航空網 m.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：757 AMM 飛機維護手冊 LIFTING & SHORING(7)
