B.
Equipment

 (1)  
Rig Pins from Set B20003-XX (AMM 20-10-24/201):

 (a)  
NS1 - P/N B20003-20

 (b)  
NS2 - P/N B20003-24

 (c)  
NS3 - P/N B20003-5

 (d)  
NS5 - P/N B20003-5

 (2)  
Stop watch - commercially available

 (3)  
Dial indicator torque wrench - commercially available

 (4)  
Adaptor - B32067-1

 (5)  
Towing Lever Lockpin - A09003-1

 32-51-00
 ALL  ú ú 01A Page 529 ú Sep 28/01
 
A

757
MAINTENANCE MANUAL

 C. Consumable Materials
 (1)  
D00015 Grease, Corrosion Preventive - BMS 3-24

 D.
References

 (1)  
AMM 07-11-01/201, Jacking Airplane

 (2)  
AMM 24-22-00/201, Electrical Power - Control

 (3)  
AMM 27-21-00/501, Rudder Control System

 (4)  
AMM 29-11-00/201, Main (Left, Right, and Center) Hydraulic Systems

 (5)  
AMM 32-00-15/201, Landing Gear Door Locks

 (6)  
AMM 32-00-20/201, Landing Gear Downlocks

 E.
Prepare for the Test

 S 495-071
 (1)  Make sure the downlocks are installed on the nose and main landing gear (AMM 32-00-20/201).
 S 495-072
 WARNING: USE THE PROCEDURE IN 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 865-073

 (3)  
Supply electrical power (AMM 24-22-00/201).

 S 865-074

 (4)  
Make sure the rudder pedals are in the neutral position.

 S 865-075

 (5)
Make sure the rudder trim indicator is at the zero position.

 S 825-076

 (6)  
Make sure the rudder control system is correctly adjusted
 (AMM 27-21-00/501).

 S 865-077

 (7)  
Remove the pressure from the left hydraulic system
 (AMM 29-11-00/201).

 32-51-00
 ALL  ú ú 01A Page 530 ú Sep 28/01
 
A

757
MAINTENANCE MANUAL

 S 585-078
 CAUTION: DO NOT MAKE A STEERING INPUT GREATER THAN 45 DEGREES WITH THE
_______ UPPER TORSION LINKS LOWERED (AIR MODE). THIS CAN CAUSE DAMAGE TO THE AIRPLANE.
 (8)  
Lift the airplane nose on jacks (AMM 07-11-02/201).

 S 865-079

 (9)  
Make sure the centering cam for the shock strut moved the nose wheels to a position less than 1/4-degrees from the center with the shock strut fully extended (use the decal for reference).

 NOTE: You can manually help the cam to make sure it is in the
____
 center.

 F. Do the Steering System Clearance, Valve Binding, and Centering Test
 S 865-080
 (1)  
Make sure the pressure is removed from the left, right and center hydraulic system (AMM 29-11-00/201).

 S 035-181

 (2)  
Hold up the nose landing gear at the axle. Disconnect the torsion links (42 and 44, Detail A, Fig. 502) (AMM 32-21-09/401).

 S 985-082

 (3)  
Lift the top torsion link (44) to simulate the ground mode position for the nose landing gear. Hold up the torsion link (44) in the position to make the piston position quadrant (46) touch the upstop (38) and to make the upper link parallel to the ground. This will engage the rudder steering interconnect.

 S 865-083
 CAUTION: DO NOT MAKE A STEERING INPUT GREATER THAN 45 DEGREES WITH THE
_______ UPPER TORSION LINKS LOWERED (AIR MODE). THIS CAN CAUSE DAMAGE TO THE AIRPLANE.
 (4)  
Put the towing lever on the metering valve module for the nose wheel steering (50) to the TOW position.

 (5)  
Install the towing lever lockpin.

 S 495-084
 

 32-51-00
 ALL  ú ú 01A Page 531 ú Sep 28/01
 
A

757
MAINTENANCE MANUAL

 S 985-085
 (6)  Use the upper torsion link (44) to manually turn the steering
 collar (41) clockwise until the steering actuators get to the bottom
 of their travel.  Make sure the conditions that follow occur:
 NOTE:____ When you do this, the steering tiller will move.
 (a)  The angular movement of the steering collar (41) is not less
　
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 起落架 CHAPTER 32 - LANDING GEAR 3(112)