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747-400 MAINTENANCE MANUAL
 (c)  Install the packings on the hydraulic sample valve.
 (d)  Install the hydraulic sample valve in the reservoir port.
 1)  Make sure the valve outlet points down.
 (e)  Turn the valve knob clockwise and tighten it with your fingers.
 NOTE:____ This closes the hydraulic sample valve.
 (f)  Install a lockwire between the valve knob, the valve housing,
 and the reservoir port.
 (g)  Install a cap on the valve outlet.
 S 614-016
 (2)  Do this task:  "Hydraulic Reservoir Servicing" (AMM 12-12-01/301).
 S 864-017
 (3)  Do this task:  "Pneumatic System Pressurization" (AMM 36-00-00/201).
 S 794-018
 (4)  Examine the reservoir sample valve for leakage.
 (a)  If you find leakage, repair the cause of it.
 S 414-020

 CAUTION: MAKE SURE YOU LATCH THE FAIRING DOORS ON THE TRAILING EDGE
_______ CORRECTLY. DAMAGE CAN OCCUR IF THE DOORS OPEN DURING A FLIGHT.
 (5)  Close the fairing doors on the trailing edge of the strut (AMM 54-62-00/201).
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747-400 MAINTENANCE MANUAL
 RESERVOIR DRAIN VALVE - REMOVAL/INSTALLATION
____________________________________________
 1.  General_______
 A.  This procedure contains the tasks to remove and install the reservoir drain valve. The installation task also contains a test of the drain valve installation.
 B.  You can get access to the reservoir drain valve through the fairing doors on the trailing edge of the strut.
 TASK 29-11-03-004-001
 2.  Reservoir Drain Valve Removal (Fig. 401)_____________________________
 A.  Standard Tools and Equipment
 (1)
Container - 15 gallon (57 liters) capacity (for hydraulic fluid)

 B.  
References

 (1)  
AMM 29-11-00/201, Main Hydraulic Supply System

 (2)  
AMM 29-17-01/201, Reservoir Pressurization Module

 (3)  
AMM 36-00-00/201, Pneumatic System

 (4)  
AMM 54-62-00/201, Nacelle Strut Access Panels

 (5)  
IPC 29-11-01 Fig. 1 (Outboard), IPC 29-11-01 Fig. 5 (Inboard)

 C.  
Access

 (1)  
Location Zone
 454 System 1 - Strut Aft Fairing
 464 System 2 - Strut Aft Fairing
 474 System 3 - Strut Aft Fairing
 484 System 4 - Strut Aft Fairing

 (2)  
Access Panel
 454A Trailing Edge Fairing Doors - System 1
 464A Trailing Edge Fairing Doors - System 2
 474A Trailing Edge Fairing Doors - System 3
 484A Trailing Edge Fairing Doors - System 4

 D.  
Procedure

 S 014-002
 (1)  
Open the fairing doors on the trailing edge of the strut (AMM 54-62-00/201).

 (2)
Release the pressure in the hydraulic system (AMM 29-11-00/201).

 S 864-003
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747-400
MAINTENANCE MANUAL

WASHER (4 LOCATIONS) 
PACKING  BOLT (4 LOCATIONS) 
SEE  A 
RESERVOIR DRAIN VALVE  FWD 
MOUNTING FLANGE FOR THE RESERVOIR VALVE  B  VALVE HANDLE  HYDRAULIC RESERVOIR 
SIGHT GLASS 
SIGHT GLASS 
VALVE SAMPLE 
DRAIN VALVE SEE B  THE HYDRAULIC FLUID QUANTITY TRANSMITTER FOR AFT 
A Reservoir Drain Valve Installation Figure 401 

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