(b)  
Make sure that the drain valve handle is not locked. While the water goes through the flush line, pull and release the drain valve handle 5 times. This will cause the valve face and the valve seat to be clear.

 (c)  
Stop the flow of water through the flush line.

 (d)  
Pull the drain valve handle and turn it 90 degrees clockwise to lock the drain valve handle in the extended position.

 (e)  
Drain the toilet tank until it is empty.

 S 863-066
 (7)  Turn the drain valve handle until it is not locked and release the drain valve handle to close the waste drain valve.
 NOTE: Let the drain valve handle move suddenly into the closed
____ position. This will make sure there is a watertight seal at the tank drain valve.
 At this time you can charge the toilets and do a check for leakage of the drain valve.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 12-17-00
 ALL  ú ú 05 Page 306 ú Nov 12/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 (8)  S 863-069To lock the drain valve handle in the closed position, turn it 90 degrees clockwise.
 (9)  S 613-065On service panels that service more than one toilet tank, do the steps again to drain and flush the remaining toilet tank(s).
 S 093-020

 (10) On service panels with the drain plug in the drain outlet, do the steps that follow:
 (a)  
Install the drain plug (if applicable) and disconnect the toilet service cart,

 (b)  
Push the T-handle as far as you can and at the same time turn the handle counterclockwise.

 NOTE: This decreases the friction between the drain plug
____ and the drain tube wall.
 (c)  Hold the T-handle in as far as you can.
 1)  Turn the handle clockwise to lock the drain plug in its position.
 CAUTION:_______MAKE SURE THE DRAIN PLUG IS CORRECTLY LOCKED. IF YOU DO NOT FEEL THE HANDLE YIELD, THE HANDLE IS NOT CORRECTLY LOCKED. THIS CAN CAUSE LEAKAGE AT THE DRAIN PLUG.
 2)  Continue to turn the T-handle clockwise. If it is necessary, use more force to expand the drain plug against the drain tube until the locking device is overcenter.
 CAUTION:_______MAKE SURE THE DRAIN PLUG IS CORRECTLY LOCKED. IF THE COUPLING HANDLE DOES NOT DISENGAGE EASILY, THE DRAIN PLUG IS NOT CORRECTLY LOCKED AND LEAKAGE CAN OCCUR.
 3)  Pull the T-handle to disengage it from the drain plug.
 S 093-019
 (11) Disconnect the waste drain tube from the service panel.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 12-17-00
 ALL  ú ú 06 Page 307 ú Nov 12/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 S 613-067
 (12) Connect the chemical hose from the toilet service cart to the flush ports on the service panel.
 (a)  Fill the system with the recommended chemical precharge to the quantity shown on the service panel placard. The suggested amount is 3 gallons (12 liters).
 NOTE: Too much precharge can cause the toilet tank to become
____
 full if usage is high.

 S 093-034
 (13)
 Disconnect the chemical hose.

 S 683-071

 (14)
 Make sure the flush/fill port is drained.

 NOTE: The flush/fill port is fully drained when fluid no longer
____ drips. The fluid could take as long as 6 minutes to drain.
 S 163-035
 (15)
 Clean and dry all of the service panel components and the doors.

 S 033-036

 (16)
 Close the cap for the flush/fill port (if installed).

 S 213-077
 CAUTION:_______DO NOT LET THE TOILET FLUID TOUCH THE SEALS. IF THE TOILET FLUID TOUCHES THE SEALS, IT CAN CAUSE THE SEALS TO DETERIORATE.
 (17) On service panels with a flapper valve, examine the flapper valve seal for damage or deterioration.
　
中國航空網 www.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：737-300 400 500 AMM 飛機維護手冊 SERVICING(86)