WATER TANK
ADJUSTMENT STRUT
AIR  QUANTITY 
PRESSURE  TRANSMITTER 
LINE 
ATTACHMENT 
BOLT  OVERFLOW 
LINE 
FILL 
LINE 

STRUT
SEE B
DRAIN LINE
FWD INBD DRAIN VALVE SEE D
DRAIN VALVE SHAFT
WATER TANK
A
WASHER
(EACH SIDE)

ATTACHMENT BOLT ASSEMBLY
CB
Potable Water Tank Installation Figure 401 (Sheet 1)
SUPPLY
LINE
SEE C
WATER TANK
END PLUG
WATER
TANK
MOUNTING BRACKET (2 LOCATIONS)
FWD
INBD
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL

(SHOWN IN CLOSED POSITION)
DRAIN VALVE

Potable Water Tank Installation
Figure 401 (Sheet 2)

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
 (3)  S 014-009Remove the water fill line from the water tank.
 (4)  S 014-010Remove the overflow line from the water tank.
 (5)  S 014-011Remove the water supply line from the water tank.
 (6)  S 014-012Remove the adapter connect pin from the actuator shaft.
 (7)  S 014-013Pull the actuator valve handle on the service panel to remove the actuator shaft.
 (8)  S 014-014Loosen the bolts found on the struts on the forward side of the water tank.
 (9)  S 014-015Remove the bolt assembly on the aft side of the water tank.
 NOTE:____ The bolt attaches to the nutplate on the outboard mounting bracket.

 S 014-016
 (10)
 Remove the top bolts and washers found on the struts on the forward side of the tank.

 S 014-017

 (11)
 Turn the struts away from the tank.

 S 014-053
 CAUTION:_______BE CAREFUL WHEN YOU REMOVE THE POTABLE WATER TANK. IF THE DRAIN VALVE AND THE QUANTITY TRANSMITTER TOUCH OTHER SURFACES, DAMAGE CAN OCCUR.
 (12) Carefully remove the water tank.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 S 014-054
 (13)
 Remove the insulation blanket from the water tank.

 S 014-019

 (14)
 Loosen the jamnut and remove the drain valve with the O-ring from the water tank boss.

 S 014-020

 (15)
 Remove the quantity transmitter from the water tank
 (AMM 38-11-21/401).

 TASK 38-11-11-404-022
 3. Potable Water Tank Installation
_______________________________
 A. References
 (1)  
AMM 38-41-00/201, Water Tank Pressurization System

 (2)  
AMM 38-11-21/401, Water Quantity Transmitter

 (3)  
AMM 24-22-00/201, Manual Control

 (4)  
AMM 12-14-00/301, Water Servicing

 B. Access
 (1)  Location Zone
 220 Aft Cargo Compartment Equipment Bay

 C. Prepare the Potable Water Tank for Installation
 S 214-059
 (1)  Verify if the "WARNING" markers are installed on the end caps of the potable water tank.
 NOTE: If the marker is not installed on either of the end caps,
____ install the markers per SB 737-11-1097 before returning the aircraft to service.
 S 414-025
　
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