(1)
Apply hydraulic lubricant or hydraulic fluid to the new O-ring (4).

 (2)
Install the new O-ring (4) on the drain valve (3).

 (3)
Remove the cap from the opening in the reservoir.

 (4)
Put the drain valve (3) and the O-ring (4) on the reservoir.

 (5)
Install the bolts (1) and washers (2).

 S 644-014
 S 434-015
 S 434-016
 S 424-017
 S 424-018
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757
MAINTENANCE MANUAL

 (6)  S 434-019Tighten the bolts (1) to 25-30 pound-inches.
 (7)  S 864-020Close the drain valve (3).
 (8)  S 434-021Safety the drain valve (3) with a lockwire.
 (9)  S 614-022Fill the hydraulic reservoir (AMM 12-12-01/301).
 S 864-023

 (10) Remove the DO-NOT-CLOSE tags and close these circuit breakers on the overhead panel, P11:
 (a)
11K15, HYDRAULICS ELEC PUMP C1

 (b)
11K16, HYDRAULICS ELEC PUMP RIGHT

 (c)
11K24, HYDRAULICS ELEC PUMP C2

 (d)
11K25, HYDRAULICS ELEC PUMP LEFT

 S 864-024
 (11)
 Pressurize the hydraulic reservoir (AMM 29-11-00/201).

 S 794-025

 (12)
 Make sure there are no leaks at the drain valve (3).

 S 114-026
 CAUTION: QUICKLY CLEAN THE INSTALLATION AREA OF ALL HYDRAULIC
_______ FLUID. HYDRAULIC FLUID CAN CAUSE DAMAGE TO THE AIRPLANE EQUIPMENT.
 (13)
 Clean all hydraulic fluid from the installation area (Ref 12-25-01).

 S 414-027

 (14)
 For the center hydraulic system, close the access panel, 197KL, for the central hydraulic service center (AMM 06-41-00/201).

 S 494-028
 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.
 (15) For the left or right hydraulic system, remove the door locks from the landing gear doors and close the doors (AMM 32-00-15/201).
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757 MAINTENANCE MANUAL
 RESERVOIR SAMPLING VALVE - REMOVAL/INSTALLATION
_______________________________________________
 1.  General
_______
 A.  This task has two tasks. One task removes the sampling valve on the reservoir in the left, right, or center hydraulic systems. The other task installs the sampling valve.
 TASK 29-11-23-004-001
 2.  Remove the Sampling Valve (Fig. 401)
_________________________
 A.  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

 (4)  
AMM 32-00-20/201, Landing Gear Downlocks
　
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