(22)
 Make sure the space between the trunnion nuts and the threads is full of sealant (View B-B).

 S 394-039

 (23)
 Apply fillet seals between the bearings and the nuts at the top and lower trunnion bearings.

 S 434-040

 (24)
 Install the actuator rod end to the steering collar with the pin, caps and bolt (View A-A).

 S 434-041

 (25)
 Tighten the nut on the bolt (View A-A).

 S 034-042

 (26)
 Loosen the nut to the nearest lock position.

 S 434-043

 (27)
 Install the cotter pin.

 S 644-044

 (28)
 Use the grease fitting to lubricate the actuator rod end with grease.

 (29)
 Align the top and lower torsion links.

 S 434-047

 (30)
 Connect the upper to the lower torsion links at the apex joint (AMM 32-21-09/401).

 S 984-045
 

 32-51-11
 ALL  ú ú 01 Page 409 ú May 28/99
 
A

757 MAINTENANCE MANUAL
 S 714-051
 (31)
 Do the steps that follow to bleed the system and to make sure it operates correctly:

 (a)  
Pressurize the left hydraulic system (AMM 29-11-00/201).

 (b)  
Operate the steering tiller through its cycle three or four times to bleed the steering system.

 (c)  
Do a test of the tiller operation for nose wheel steering (AMM 32-51-00/501).

 (d)  
Make sure there are no hydraulic leaks.

 G.
Put the Airplane Back to Its Usual Condition

 S 864-052
 (1)  
Remove the pressure from the left hydraulic system if it is not necessary (AMM 29-11-00/201).

 S 614-053

 (2)  
Make sure the fluid in the hydraulic reservoir is at the correct level. Fill if it is necessary (AMM 12-12-01/301).

 32-51-11
 ALL  ú ú 01 Page 410 ú May 28/99
 
A

757 MAINTENANCE MANUAL
 NOSE WHEEL STEERING METERING VALVE - REMOVAL/INSTALLATION
_________________________________________________________
 1.  General_______
 A.  This procedure contains two tasks. The first task removes the metering valve for the nose wheel steering. The second task installs the metering valve.
 TASK 32-51-12-004-001
 2.  Remove the Metering Valve for the Nose Wheel Steering (Fig. 401)_____________________________________________________
 A.  References
 (1)  
AMM 29-11-00/201, Pressurize/Depressurize Main Hydraulic Systems

 (2)  
AMM 32-00-20/201, Landing Gear Downlocks

 (3)  
AMM 32-21-09/401, Nose Gear Torsion Links

 (4)  
AMM 32-51-00/501, Nose Wheel Steering System

 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)  
Spanner Wrench - F72959-35

 (3)  
Trunnion Nut Wrench - A32035-1

 (4)  
Towing Lever Lockpin - A09003-1

 C.  
Access

 (1)  
Location Zones
 115 NLG Wheel Well (Left)
 116 NLG Wheel Well (Right)
 211 Control Cabin (Left Side)
 212 Control Cabin (Right Side)
 711 Nose Landing Gear (NLG)

 D.  
Prepare for the Removal

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

 32-51-12
 ALL  ú ú 01 Page 401 ú May 28/99
 
A
757
MAINTENANCE MANUAL

HYDRAULIC TOP TORSION LINK
2.
 BOLT

LINE (2 LOCATIONS)
3.
 WASHER

4.
 WASHER

6. BOLT 5. NUT 3. WASHER
1. METERING
4. WASHER VALVE 5. NUT MODULE
TOWING LOWER TORSION LINK
LEVER A TOP
ACTUATOR PLATE
SWIVEL VALVE
A
SEE
A
LOWER PLATE SEE B
6. BOLT METERING VALVE
3.
 WASHER

SUPPORT BRACKET
4.
 WASHER

5.
 NUT

7. VALVE RETAINER NUT SWIVEL VALVE ACTUATOR TRUNNION
BEARING
TRUNNION NUT
ACTUATOR
TOP PLATE
INDEX 
11. PACKING  PIN  CONTROL VALVE INPUT 
　
中國(guó)航空網(wǎng) m.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(cè) 起落架 CHAPTER 32 - LANDING GEAR 3(133)