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757 MAINTENANCE MANUAL
 ~.................................................... | MAXIMUM TIME TO OPERATE AT | | 37 GPM HYDRAULIC FLUID FLOW *[1] | ...................................................... | | RETRACTION | EXTENSION | ...................................................... | DOORS CLOSED | | | | (cycle complete) | 20 sec | 32 sec | 2......................…..............…..............1
 *[1]  These values are approximate times that start with control lever movement
 F. Put the Airplane Back to Its Usual Condition
 S 865-016
 (1)  
Remove the power from the left hydraulic system if it is not necessary (AMM 29-11-00/201).

 S 865-017

 (2)  
Remove electrical power if it is not necessary (AMM 24-22-00/201).

 S 495-018

 (3)  
Install the downlocks for the nose and main landing gear
 (AMM 32-00-20/201).

 (4)  
Lower the airplane and remove the jacks (AMM 07-11-01/201).

 S 495-019
 

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757 MAINTENANCE MANUAL
 MAIN GEAR RETRACT ACTUATOR - REMOVAL/INSTALLATION
_________________________________________________
 1.  General_______
 A.  This procedure provides two tasks. The first task removes the main gear retract actuator. The second task installs the main gear retract actuator.
 TASK 32-32-01-004-001
 2.  Remove the Main Gear Retract Actuator (Fig. 401)_____________________________________
 A.  References
 (1)  
AMM 06-44-00/201, Wing Access Doors and Panels

 (2)  
AMM 12-12-01/301, Hydraulic Systems

 (3)  
AMM 29-11-00/201, Pressurize/Depressurize Main Hydraulic System

 (4)  
AMM 32-00-20/201, Landing Gear Downlocks

 B.  
Equipment

 (1)  
Retract Actuator Hoist Adapter, MLG - B32008-1

 (2)  
Thread Protector Set, MLG - B32011-1

 (3)  
Retract Actuator Retraction/Extension Pump, MLG

 -A32027-53, -90, -153 (As Applicable)
 (4)  
Boom Hoist - A20001-79

 (5)  
Crowfoot Wrench - F70312-38

 C.  
Consumable Materials

 (1)  
D00633 Grease - BMS 3-33 (Recommended)

 (2)  
D00013 Grease - MIL-G-23827 (Alternative)

 (3)  
D00148 Fluid, Hydraulic - BMS 3-11, Type IV,
 Class 1

 D.  
Access

 (1)  
Location Zones
 551 Rear Spar to MLG Support Beam (Left)
 651 Rear Spar to MLG Support Beam (Right)

 (2)  
Access Panels
 551BB Wing Access Panel (Left)
 551CT Wing Access Panel (Left)
 651BB Wing Access Panel (Right)
 651CT Wing Access Panel (Right)

 E.  
Prepare for Removal

 S 494-002
 (1)  
Make sure the downlocks for the nose and main landing gear are installed (AMM 32-00-20/201).

 S 864-003

 (2)  
Remove the pressure from the left hydraulic system and the hydraulic reservoir (AMM 29-11-00/201).

 S 014-004

 (3)  
Remove the wing access panels 551BB-left (651BB-right) below the retract actuator, and 551CT-left (651CT-right), above the retract actuator (AMM 06-44-00/201).

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A 757 MAINTENANCE MANUAL 
B  SEE  A 
B  A A 
SHOCK STRUT  SIDE STRUT AND DOWNLOCK ASSEMBLY  1. PIN  ACTUATOR 2. RETRACT  (2 LOCATIONS) 3. SPACER  4. ANTIROTATION BOLT 
INBD 
5. NUT 
BOLT ACTUATOR ATTACHMENT YOKE 9. ANTIROTATION  WASHER 13. TANG 10. NUT 11. WASHER 12. NUT  SHOCK A-A STRUT  WASHER 8. TANG FWD  6. WASHER 7. NUT 
ACTUATOR 2. RETRACT 
14. PIN  B-B 
Main Gear Retract Actuator Installation Figure 401 (Sheet 1) 

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757
MAINTENANCE MANUAL

RETURN HYDRAULIC LINE DOWN HYDRAULIC LINE  SEE  B 
　
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本文鏈接地址：757 AMM 飛機維護手冊 起落架 CHAPTER 32 - LANDING GEAR 2(45)