29-21-11
 ALL  ú ú 01 Page 406 ú May 28/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757
MAINTENANCE MANUAL

 S 094-049
 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.
 (5)  
Remove the door locks from the landing gear doors and close the doors (AMM 32-00-15/201).

 S 864-050

 (6)  
Remove the hydraulic power if it is not necessary
 (AMM 29-11-00/201).

 TASK 29-21-11-404-051
 6. Install the Pressure Switch for the Ram Air Turbine (RAT)
_________________________________________________________
 A. Consumable Materials
 (1)  D00054 Hydraulic System Lubricant - MCS 352
 B. References
 (1)  
AMM 12-25-01/301, Exterior Cleaning

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

 (3)  
AMM 29-21-00/501, Ram Air Turbine (RAT) System

 (4)  
AMM 32-00-15/201, Main Gear Door Locks

 C. Access
 (1)  Location Zone
 144 Right MLG Wheel Well
 730/740 Main Landing Gear and Doors

 D. Install the Pressure Switch (Fig. 401)
 S 644-052
 (1)  
Apply the hydraulic lubricant or hydraulic fluid to the O-ring and the threads of the pressure switch.

 S 434-053

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

 (3)  
Install the pressure switch on the checkout module.

 (4)  
Tighten the pressure switch to 75-100 pound-inches.

 (5)  
Safety the pressure switch with a lockwire.

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

 S 424-054
 S 434-055
 S 434-056
 S 434-057
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 29-21-11
 ALL  ú ú 01 Page 407 ú May 28/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757 MAINTENANCE MANUAL
 E. Put the Airplane Back to its Usual Condition
 S 864-058
 (1)  
Pressurize the center hydraulic system and the reservoir (AMM 29-11-00/201).

 S 734-059

 (2)  
Do the system test procedure for the hydraulic pump and drive system of the ram air turbine (AMM 29-21-00/501).

 S 214-060

 (3)  
Make sure there are no leaks at the pressure switch on the checkout module.

 S 114-061
 CAUTION: QUICKLY CLEAN THE AREA AROUND THE CHECKOUT MODULE OF ALL
_______ HYDRAULIC FLUID. HYDRAULIC FLUID CAN CAUSE DAMAGE TO THE AIRPLANE EQUIPMENT.
 (4) Clean all hydraulic fluid from the area (AMM 12-25-01/301).
 S 094-062
 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.
 (5)  
　
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