32-34-02
ALL ú ú 01 Page 405 ú May 28/99
A
757 MAINTENANCE MANUAL
NOSE GEAR DOOR ACTUATOR - REMOVAL/INSTALLATION
______________________________________________
1. General_______
A. This procedure contains two tasks. The first task is for removal of the actuator for the nose landing gear door. The second task is for installation of the door actuator.
TASK 32-34-03-004-037
2. Remove the Door Actuator for the Nose Landing Gear (Fig. 401)__________________________________________________
A. Equipment
(1)
Door Hold-Open Strut, NLG - B32009-1
B.
References
(1)
AMM 29-11-00/201, Pressurize/Depressurize Main Hydraulic System
(2)
AMM 32-00-15/201, Landing Gear Door Locks
(3)
AMM 32-00-20/201, Landing Gear Downlocks
C.
Access
(1)
Location Zones
115 Nose Landing Gear Wheel Well (Left)
116 Nose Landing Gear Wheel Well (Right)
D.
Prepare for Removal
S 494-001
(1) Make sure the downlocks are installed on the nose and main landing gear (AMM 32-00-20/201).
S 494-055
WARNING:_______USE THE PROCEDURE AMM 32-00-15 TO INSTALL THE DOOR LOCKS. THE DOORS OPEN AND CLOSE QUICKLY AND CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(2)
Open the doors for the landing gear and install the door locks (AMM 32-00-15/201).
S 864-003
(3)
Remove the pressure from the left hydraulic system and the hydraulic reservoir (AMM 29-11-00/201).
32-34-03
ALL ú ú 01 Page 401 ú May 28/01
A
757
MAINTENANCE MANUAL
LINE FITTING 3. UPPER HYDRAULIC 4. DOOR ACTUATOR LINE BSEE 2. UPPER HYDRAULIC
FLOW CONTROL VALVE (REF)
HYDRAULIC LINE 5. LOWER
SEE A (REF) SEQUENCE VALVE DOOR-OPERATED B B FITTING HYDRAULIC LINE 6. LOWER
7. BELLCRANK
FORWARD DOORS
A
GEAR CRANK 1. UPLOCK FITTING LINE HYDRAULIC 3. UPPER LINE HYDRAULIC 2. UPPER ACTUATOR 4. DOOR
A
CRANK 10. UPLOCK A LINE HYDRAULIC 5. LOWER
8. NUT 9. BOLT FITTING LINE HYDRAULIC 6. LOWER
B
Figure 401 (Sheet 1) Nose Landing Gear Door Actuator Installation
32-34-03
ALL ú ú 01 Page 402 ú May 28/99
A
757
MAINTENANCE MANUAL
12. BOLT
11. PIN
18. ACTUATOR FITTING FLANGE
18. ACTUATOR FITTING FLANGE
14.
DOOR ACTUATOR HEAD FWD FITTING
15.
WASHER (2 LOCATIONS)
FWD
25. DOOR 24. WASHER ACTUATOR (2 LOCATIONS) ROD END FITTING
B-B
Nose Landing Gear Door Actuator Installation
Figure 401 (Sheet 2)
32-34-03
ALL ú ú 01 Page 403 ú May 28/99
A
757
MAINTENANCE MANUAL
SEE A OF THE ACTUATOR FLANGE TO HOLD THE TOP 18. FITTING 30. PIN TOOL 31. DOOR HOLD-OPEN
9. BELLCRANK
32. PIN
FLANGE 21. BELLCRANK
A
Hold-Open Tool Installation for the Doors on the Nose Landing Gear Figure 402
32-34-03
ALL ú ú 01 Page 404 ú May 28/99
A
757 MAINTENANCE MANUAL
E. Remove the Door Actuator
S 034-004
(1)
Disconnect the hydraulic lines (2, 5) from the actuator.
S 494-005
(2)
Install the plugs in the hydraulic line (2, 5) and fittings (3, 6).
S 034-006
(3)
Remove the collar (29) from the pin (28).
S 034-035
(4)
Remove the nut (22) and washer (23), then remove the bolt (27) from the bellcrank (21) (View B-B).
S 034-036
(5)
Move the actuator rod end (25) out from between the bellcrank flanges (21).
S 034-007
(6)
Loosen the nut (8) and bolt (9) on the uplock crank (10) (Detail B). Move the crank (10) off the gear on the head end of the retract actuator (1).
S 024-008
(7)
While you hold up the actuator, remove the bolt (12) at the head end of the actuator (14) (View A-A). Remove the actuator from the airplane.
中國航空網(wǎng) www.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：757 AMM 飛機(jī)維護(hù)手冊 起落架 CHAPTER 32 - LANDING GEAR 2(83)
