(2)  
32-00-15/201, Landing Gear Door Locks

 (3)  
32-00-20/201, Landing Gear Downlocks

 (4)  
32-34-00/501, Nose Gear Extension and Retraction

 B.  
Access

 (1)  
Location Zone
 115 Nose Landing Gear Wheel Well (Left)

 C.  
Prepare for Removal

 S 494-003
 (1)  Make sure the downlocks are installed on the nose and main landing gear (Ref 32-00-20).
 S 494-004
 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 (Ref 32-00-15).

 S 864-005

 (3)  
Remove the pressure from the left hydraulic system and hydraulic reservoir (Ref 29-11-00).

 D.  
Remove the Valve

 (1)  
Disconnect the hydraulic lines from the valve.

 S 034-006
 

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A

757 MAINTENANCE MANUAL
 (2)  S 494-007Install plugs in the hydraulic lines and fittings.
 (3)  S 034-008Remove the bolt to disconnect the rod from the rod arm (View A-A).
 (4)  S 024-009Remove the bolts to disconnect the valve from the bracket. 

BRACKET
ROD ARM
WASHER (2 LOCATIONS)
NUT VALVE

BOLT

A
BUSHING

Nose Landing Gear Gear Sequence Valve Bypass Valve Installation Figure 401

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A
757 MAINTENANCE MANUAL
 TASK 32-34-04-404-019
 3. Install the Sequence Valve Bypass Valve (Fig. 401)
_______________________________________
 A. References
 (1)  
12-12-01/301, Hydraulic Systems

 (2)  
29-11-00/201, Pressurize/Depressurize Main Hydraulic System

 (3)  
32-00-15/201, Landing Gear Door Locks

 B.
Access

 (1)  
Location Zone
 115 Nose Landing Gear Wheel Well (Left)

 C.
Procedure

 S 424-011
 (1)  
Install the bolts and washers to connect the valve to the bracket (Detail A).

 S 434-012

 (2)  
Install the bolt, bushing, washers, and nut to connect the rod to the rod arm (View A-A).

 S 434-013

 (3)  
Make sure the pressure is removed from the left hydraulic system and reservoir. Connect the hydraulic lines to the valve.

 S 864-014

 (4)  
Pressurize the left hydraulic system (Ref 29-11-00).

 S 714-020

 (5)  
Do the extension and retraction test for the nose landing gear (Ref 32-34-00).

 S 794-015

 (6)  
Examine the valve for hydraulic leaks.

 S 614-016

 (7)  
Make sure the fluid in the hydraulic reservoirs is at the correct level. Fill if it is necessary (Ref 12-12-01).

 S 094-017
 WARNING: USE THE PROCEDURE IN AMM 32-00-15 TO REMOVE THE DOOR LOCKS.
_______ THE DOORS OPEN AND CLOSE QUICKLY AND CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (8)  
Remove the door locks from the landing gear doors and close the doors (Ref 32-00-15).

 S 864-018

 (9)  
Remove the power from the left hydraulic system if it is not necessary (Ref 29-11-00).

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A

757 MAINTENANCE MANUAL
 NOSE GEAR DOOR-OPERATED SEQUENCE VALVE - REMOVAL/INSTALLATION
_____________________________________________________________
 1.  General
_______
 A.  This procedure contains two tasks. The first task is for removal of the door-operated sequence valve for the nose landing gear. The second task is for installation of the door-operated sequence valve.
 TASK 32-34-05-004-001
 2.  Remove the Door-Operated Sequence Valve for the Nose Landing Gear (Fig. 401)
_________________________________________________________________
 A.  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

 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(86)