C. References
 (1)  
AMM 06-41-00/201, Fuselage Access Doors and Panels

 (2)  
AMM 29-11-00/201, Main (Left, Right, and Center) Hydraulic Systems

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

 D.
Access

 (1)  
Location Zones
 143/144 MLG Wheel Well
 197 Wing to Body - Aft Lower Half (Left)

 (2)  
Access Panel
 197KL Central Hydraulic Service Center

 E.
Procedure

 S 434-011
 (1)  
Remove the cap from the opening in the reservoir.

 S 644-012

 (2)  
Apply hydraulic lubricant or hydraulic fluid to the new O-ring (2) and the threads on the pressure switch.

 S 434-013

 (3)  
Install the new O-ring (2) on the pressure switch (1).

 S 424-014

 (4)
Install the pressure switch (1) in the opening in the reservoir.

 S 434-015

 (5)  
Safety the pressure switch (1) with a lockwire.

 S 434-016

 (6)
Connect the electrical connector to the pressure switch (1).

 S 864-017

 (7)  
Pressurize the hydraulic reservoir on which you installed the pressure switch (1) (AMM 29-11-00/201).

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MAINTENANCE MANUAL

 (8)  S 794-018Make sure there are no leaks of air at the pressure switch (1).
 (9)  S 864-019Remove the DO-NOT-CLOSE tags and close these circuit breakers on the overhead panel, P11: (a) EICAS (6 locations)
 S 414-020

 (10) If you installed the pressure switch (1) on the reservoir in the center hydraulic system, do this step:
 (a)  Close the access panel, 197KL, for the central hydraulic service center (AMM 06-41-00/201).
 S 094-021
 (11) If you installed the pressure switch on the reservoir in the left or right hydraulic system, do this step:
 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.
 (a)  Remove the door locks from the landing gear doors and close the doors (AMM 32-00-15/201).
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