S 864-025
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A
747-400 MAINTENANCE MANUAL
 WATER TANK - REMOVAL/INSTALLATION
_________________________________
 1.  General_______
 A.  This procedure gives the instructions for two tasks. The first task is for the removal of one or more water tank(s). The second task is the installation of the water tank(s).
 TASK 38-11-64-384-001
 2.  Water Tank Removal (Fig. 401)__________________
 A.  Standard Tools and Equipment
 (1)  Caps for the disconnected water and pressurization lines.
 B.  References
 (1)  
AMM 12-14-61/301, Water System

 (2)  
AMM 25-52-01/401, Containerized Cargo Compartment Ceiling and Sidewall Linings

 (3)  
AMM 38-15-60/201, Water System Pressurization

 C.  Access
 (1)  Location Zone 124 Forward Cargo Container Compartment Aft Half, Right
 D.  Procedure
 S 844-002
 (1)  Do this task: "Water System Servicing (Drain)" (AMM 12-14-61/301).
 S 864-003
 WARNING: MAKE SURE YOU REMOVE THE AIR PRESSURE FROM THE WATER
_______ PRESSURIZATION SYSTEM BEFORE YOU START TO REMOVE THE WATER TANK(S). AIR WITH HIGH PRESSURE AND TEMPERATURE CAN CAUSE INJURY TO PERSONS.
 (2)
Do this task: "Water System Depressurization (AMM 38-15-60/201).

 S 014-004

 (3)  
Do the "Containerized Cargo Compartment Ceiling and Sidewall Linings Removal" task (AMM 25-52-01/401) to remove the RH vertical sidewall panels between stations 820 and 860.

 S 014-005

 (4)  
Do the "Containerized Cargo Compartment Ceiling and Sidewall Linings Removal" task (AMM 25-52-01/401) to remove the ceiling panels adjacent to the sidewall panels that you removed.

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A
747-400
MAINTENANCE MANUAL

LOCKWIRE INSTALLATION (EXAMPLE)

THERMOSTAT
HEATER
(EXAMPLE)
(EXAMPLE)
Water Tank Installation
Figure 401 (Sheet 1)

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C24335
A
747-400 MAINTENANCE MANUAL
BOLT

TANK PLAIN
TANK SUPPORT
TEFLON WASHER

PLAIN TANK BOLTBOLTWASHER SUPPORT

TANK SUPPORT

TIGHTEN THE BOLT TO NOT MORE THAN 20 POUND - INCHES
APPLY A THIN LAYER OF BMS 3-24 GREASE TO THE SURFACE THAT TOUCHES THE PLAIN WASHER. DO NOT APPLY TO THE SURFACE THAT TOUCHES THE TEFLON WASHER
INSTALL THE BOLT WET WITH BMS 5-95 SEALANT
APPLY A THIN LAYER OF BMS 3-24 GREASE ON THE SURFACES THAT TOUCH

Water Tank Installation
Figure 401 (Sheet 2)

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C24385
A 747-400 MAINTENANCE MANUAL
O-RING (2 LOCATIONS)

LOCKWIRE
INSTALLATION

Water Tank Installation
Figure 401 (Sheet 3)

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