C. Procedure
 S 214-013
 (1)  Make sure the attach surface of the end closure, the retaining ring, the transmitter, and the tank do not have defects.
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 (2)  S 434-014Carefully put the transmitter and the tube through the boss.
 (3)  S 434-015With the transmitter inside the tank, install the float and the cotter pin on the transmitter tube.
 (4)  S 424-016Carefully turn the part of the transmitter with the threads into the boss on the tank.
 (5)  S 434-017Install a new O-ring on the boss.
 (6)  S 424-033Install the transmitter fitting, the bonding lug, the screws, and the lockwire on the top of the boss.
 (7)  S 434-018Install a new O-ring in the groove of the end plug.
 (8)  S 414-020Install the new O-ring and make sure you cannot see the red marks in the bottom of the groove.
 S 414-019
 ú ú ú  CAUTION:_______ STRIKE THE END PLUG LIGHTLY WITH A NON-METALIC MALLET. AMETALIC INSTRUMENT CAN CAUSE DAMAGE TO THE TANK, THE END PLUG,OR THE RETAINING RING.
 ú ú ú ú ú         ú
ú ú (9) Install the tank end plug into the tank, with the spherical surfacefacing tword the inside of the tank.S 214-042CAUTION: MAKE SURE THE END CAP WARNING PLACARDS ARE INSTALLED AND_______VISIBLE UPON THE WATER TANK END CAP OR CAPS PER SB 737-11-1097.

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737-300/400/500MAINTENANCE MANUAL
 ú (10) Visibly inspect the water tank end cap or caps for the presence of
 ú warning placards.
 ú (a) If warning placards are not installed, refer to SB 737-11-1097.

 S 424-021
 (11)
 Install the water tank (AMM 38-11-11/401).

 S 864-022

 (12)
 Close the WATER QTY IND circuit breaker on the P18 panel and remove the DO-NOT-CLOSE tag.

 S 214-023

 (13)
 Make sure the water quantity indicator shows zero.

 S 864-024

 (14)
 Fill the water tank (AMM 12-14-00/301).

 S 214-025

 (15)
 Make sure the quantity indicator comes on at the F (full) mark.

 S 864-026

 (16)
 Pressurize the water tank (AMM 38-41-00/201).

 S 864-027

 (17)
 Permit 2 minutes of time for the pressure to become stable.

 S 214-028

 (18)
 Examine the connections of the water tank for leaks.

 S 414-029

 (19)
 Install the access panel on the aft bulkhead in the aft cargo compartment.

 S 864-030

 (20)
 Remove the electrical power, if it is not necessary (AMM 24-22-00/201).

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737-300/400/500MAINTENANCE MANUAL
 WATER FILL AND OVERFLOW VALVE - REMOVAL/INSTALLATION
____________________________________________________
 1.  General_______
 A.  This procedure contains two tasks. The first task removes the water fill and overflow valve (fill valve). The second task installs the fill valve.
 B.  You must drain the water tank to remove the fill valve.
 TASK 38-11-31-004-022
 2.  Fill and Overflow Valve Removal (Fig. 401)_______________________________
　
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