S 864-004
(3)
Remove the pressure from the left hydraulic system and the hydraulic reservoir (AMM 29-11-00/201).
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TOP DOWNLOCK LINK
DRAG
STRUT
SHOCK
STRUT
SEE A
LOWER SIDE STRUT
ATTACH BOLT (3 LOCATIONS)
SEQUENCE VALVE
LOWER
DOWNLOCK
LINK
TOP SIDE STRUT
TARGET
DOWNLOCK ACTUATOR
TOP DOWNLOCK LINK
A
Main Landing Gear Downlock-Operated Door Sequence Valve Installation
Figure 401
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D. Remove the Door Sequence Valve (Fig. 401)
S 034-005
(1)
Disconnect the hydraulic lines from the sequence valve.
S 494-006
(2)
Install plugs in the lines and fittings.
S 434-007
CAUTION: ATTACH THE ROLLER MECHANISM TO THE SEQUENCE VALVE BEFORE YOU
_______ REMOVE THE VALVE. THE ROLLER MECHANISM IS SPRING-LOADED AND CAN CAUSE DAMAGE TO PARTS IF IT IS NOT ATTACHED TO THE VALVE.
(3)
Attach the roller mechanism to the valve.
S 034-008
(4)
Remove the bolts that attach the valve to the frame on the wing rear spar.
S 024-009
(5)
Remove the sequence valve (Detail A).
TASK 32-32-07-404-010
3. Install the Sequence Valve for the Main Landing Gear (Fig. 401)
____________________________________________________
A. References
(1)
AMM 12-12-01/301, Hydraulic Systems
(2)
AMM 29-11-00/201, Pressurize/Depressurize Main Hydraulic System
(3)
AMM 32-00-15/201, Landing Gear Door Locks
B.
Access
(1)
Location Zones
731 Main Landing Gear (Left)
741 Main Landing Gear (Right)
C.
Procedure to Install the Sequence Valve
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S 434-011
CAUTION: ATTACH THE ROLLER MECHANISM TO THE SEQUENCE VALVE BEFORE YOU
_______ INSTALL THE VALVE. THE ROLLER MECHANISM IS SPRING-LOADED AND CAN CAUSE DAMAGE TO PARTS IF IT IS NOT ATTACHED TO THE VALVE.
(1)
Attach the roller mechanism to the valve.
S 424-012
(2)
Install the bolts, washers, and nuts to connect the valve to the frame on the wing rear spar (Detail A). Install a washer behind both the bolt heads and the nuts.
S 034-013
(3)
Release the roller mechansim and let the roller touch the target.
S 864-014
(4)
Make sure the pressure is removed from the left hydraulic system and hydraulic reservoir (AMM 29-11-00/201).
S 434-015
(5)
Connect the hydraulic lines to the valve.
D.
Do a Check of the Sequence Valve For Correct Installation.
S 864-016
(1)
Pressurize the left hydraulic system (AMM 29-11-00/201).
S 864-017
(2)
Move the control lever for the landing gear from OFF to DN three or four times. Return the lever to OFF.
S 794-018
(3)
Make sure the valve does not have any hydraulic leaks.
E.
Put the Airplane Back to Its Usual Condition
S 614-019
(1) Make sure the fluid in the hydraulic reservoir is at the correct level. Fill if it is necessary (AMM 12-12-01/301).
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S 094-020
WARNING: USE THE PROCEDURE IN AMM 32-00-15/201 TO REMOVE THE DOOR LOCKS.
_______ THE DOORS OPEN AND CLOSE QUICKLY AND CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(2)
Remove the door locks from the landing gear and close the doors (AMM 32-00-15/201).
S 864-020
(3)
Put the control lever for the landing gear to the DN position.
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