S 434-092

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

 S 434-093

 (3)  
Remove the cap from the opening in the filter module.

 S 424-094

 (4)  
Install the pressure switch on the filter module.

 S 434-095

 (5)  
Tighten the pressure switch to 90-125 pound-inches.

 S 434-096

 (6)  
Safety the pressure switch with a lockwire.

 S 434-097

 (7)  
Install the electrical connector on the pressure switch.

 I.
Install the Check Valves (Fig. 401)

 S 644-098
 (1)  
Apply hydraulic lubricant or hydraulic fluid to the new O-rings, the backup rings, and the threads of the check valve.

 S 434-099

 (2)  
Install new O-rings on check valve.

 S 434-100

 (3)  
Remove the cap from the opening in the filter module.

 S 424-101

 (4)  
Install the check valve on the filter module.

 S 434-102

 (5)  
Tighten the check valve to 710-760 pound-inches.

 S 434-103

 (6)  
Safety the check valve with a lockwire.

 J.
Put the Airplane Back to Its Usual Condition

 S 864-104
 (1)  Push the indicator button, on the differential pressure indicator, until it aligns with the adjacent surface.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 29-11-19
 ALL  ú ú 02 Page 408 ú May 28/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757
MAINTENANCE MANUAL

 (2)  S 864-105Remove the DO-NOT-CLOSE tags and close these circuit breakers on the overhead panel, P11: (a) 11K15, HYDRAULICS ELEC PUMP C1 (b) 11K24, HYDRAULICS ELEC PUMP C2
 (3)  S 864-106Pressurize the center hydraulic system and the reservoir (AMM 29-11-00/201).
 (4)  S 794-107Make sure there are no leaks at the filter module.
 (5)  S 864-108Remove hydraulic power if it is not necessary (AMM 29-11-00/201).
 S 114-109

 CAUTION: QUICKLY CLEAN THE INSTALLATION AREA OF ALL HYDRAULIC FLUID.
_______ THE HYDRAULIC FLUID CAN CAUSE DAMAGE TO THE AIRPLANE EQUIPMENT.
 (6)  
Clean all the hydraulic fluid from the installation area (AMM 12-25-01/301).

 S 614-110

 (7)  
Fill the reservoir in the center hydraulic system (AMM 12-12-01/301).

 S 414-111

 (8)  
　
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