757 AMM 飞机维护手册 起落架 CHAPTER 32 - LANDING GEAR 3(130)

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 (3)  S 434-020Apply the sealant to the holes and install the three bolts with the wet sealant (Detail C).
 (4)  S 434-021Attach the cover brackets to the bracket that holds the summing mechanism.
 (5)  S 434-022Connect the left and right cable pulleys (with the cables wound around them) to the pulley brackets.
 (6)  S 424-023Install the metering valve for the nose wheel steering (AMM 32-51-12/401).
 (7)  S 494-024Install the rig pins NS1, NS2, NS3 and NS5 (AMM 32-51-00/501).
 (8)  S 434-025Tighten the cables NWSA and NWSB at the turnbuckles.
 (9)  S 824-026Make sure you can put the rig pins in easily (Ref Table I of AMM 32-51-00/501 Adjustment/Test for cable tensions).

 

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 S 094-027
 (10)
 Remove the rig pins NS1, NS2, NS3, NS5, and NS6.

 S 714-028

 (11)
 Do the test of the tiller operation for the nose wheel steering (AMM 32-51-00/501).

 S 864-029

 (12)
 Remove the pressure from the left hydraulic system if it is not necessary (AMM 29-11-00/201).

 S 434-041

 (13)
 Connect the nose gear torsion links at the apex joint (AMM 32-21-09/401).

 S 434-032

 (14)
 Install the cover for the summing mechanism (Detail A).

 

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 NOSE WHEEL STEERING ACTUATOR - REMOVAL/INSTALLATION
___________________________________________________
 1.  General
_______
 A.  This procedure contains two tasks. The first task removes the actuator for the nose wheel steering. The second task installs the actuator for the nose wheel steering.
 TASK 32-51-11-004-001
 2.  Remove the Actuator for the Nose Wheel Steering (Fig. 401)
_______________________________________________
 A.  References
 (1)  
AMM 29-11-00/201, Pressurize/Depressurize Main Hydraulic System

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

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

 B.  
Equipment

 (1)  
Wrench-Adapter-Steering Nut, NLG - A32045-85

 (2)  
Spanner Wrench - F72959-35

 (3)  
Wrench-Steering Actuator, NLG - A32035-1

 (4)  
Rope-commercially available

 C.  
Access

 (1)  
Location Zones
 211 Control Cabin (Left)
 212 Control Cabin (Right)
 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).

 S 864-003

 (2)  
Make sure the pressure is removed from the left hydraulic system and reservoir (AMM 29-11-00/201).

 S 034-055
 CAUTION: DO NOT LET THE TORSION LINKS FALL FREELY WHEN YOU DISCONNECT
_______ THE TORSION LINKS. DAMAGE TO THE TORSION LINKS OR THE PROXIMITY SENSORS AND TARGETS CAN OCCUR.
 (3)  Disconnect the upper and lower torsion links at the apex joint (AMM 32-21-09/401).
 

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LOWER PLATE (REF)
STEERING NUT
C
C
SEE A
TOP OF SHOCK GLAND NUT
STRUT (REF)
SEE B
LOWER SHOCK STRUT
FWD
B
TOP OF SHOCK STRUT
(REF)

METERING VALVE MODULE (REF)
TOP TORSION LINK (REF)
LOWER TORSION
1. ACTUATOR
D
LINK (REF)
A
TOP PLATE (REF) B STEERING COLLAR ROD END BOLT
A
LOWER PLATE (REF)
D
LOWER SHOCK
STRUT (REF)
B
1. ACTUATOR
FWD

A
Nose Wheel Steering Actuator Installation
Figure 401 (Sheet 1)

 

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4.
 CAP

5.
 BOLT

EQUAL WITHIN 0.005 INCH, ALL AROUND
Nose Wheel Steering Actuator Installation Figure 401 (Sheet 2)

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