(b)  
Remove the retainer plate.

 (c)  
Install two mounting screws, but do not tighten the screws.

 NOTE: This will keep the end nipple in position.
____
 (d) Remove the shaft retainers and the drive shaft assemblies.
 NOTE: Write the location of the drive shaft assemblies and
____ orientation of the levers to help during the assembly.
 S 962-008
 (4)  To replace the seals do these steps (Fig. 201):
 (a)  
Remove and discard the seal on the drain cap.

 (b)  
Apply a thin layer of lubricant on the seal for the drain cap.

 (c)  
Install the seal for the drain cap.

 CAUTION: USE A COTTON TIPPED SWAB TO REMOVE THE O-RINGS IN THE
_______ DRIVE SHAFT CAVITIES. IF A COTTON TIPPED SWAB IS NOT USED, YOU CAN CAUSE SCRATCHES ON THE SEALING SURFACE.
 (d)  
Use a lubricated cotton tipped swab to replace the o-rings in the drive shaft cavities.

 (e)  
Remove the end nipple from the housing assembly.

 NOTE: Write the orientation of the end nipple to help
____
 during the assembly.

 (f)  
Remove the seal retainer.

 (g)  
Remove and discard the molded seal in the housing assembly.

 (h)  
Apply a thin layer of lubricant to the surface of the molded seal and install the seal in the housing assembly.

 (i)  
Remove and discard the o-ring on the end nipple.

 (j)  
Apply a thin layer of lubricant to the surface of the o-ring and install the o-ring on the end nipple.

 (k)  
Install the seal retainer.

 NOTE: Lubricate the seal retainer to keep it in its
____
 position.

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 38-32-81
 ALL  ú ú 01 Page 202 ú Mar 15/96
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
 S 412-009
 (5)  To assemble the drain valve do these steps (Fig. 201):
 (a)  
Use a 1/8-inch hex drive to turn the flapper valve lock cam so that the cam pin will clear the tab in the housing assembly.

 (b)  
Close the flapper valve and set the lock cam against the flapper valve.

 (c)  
Make sure you align the scribe mark on the nipple with the scribe mark on the housing.

 (d)  
Install the end nipple.

 (e)  
Install the drive shaft assemblies and the shaft retainers.

 (f)  
Make sure the drive shafts are fully engaged.

 (g)  
Remove the mounting screws which were temporarily placed.

 (h)  
Install the retainer plate.

 (i)  
Install the mounting screws.

 F. Put the Airplane Back to Its Usual Condition.
 S 412-010
 (1)
Make sure flapper valve is closed and close the drain valve cap.

 S 792-011

 (2)  
Do the leak check for the service panel drain valve (AMM 38-32-00/501).

 TASK 38-32-81-402-010
 3. Drain Valve Seal Replacement - Service Panels with PUSH TO OPEN Lever
_____________________________________________________________________
 A. Consumable Materials
 (1)  D00504, VV-P-236 Lubricant
 B. References
 (1)  
AMM 12-17-00/301, Toilet - Servicing

 (2)  
AMM 38-32-00/501, Toilet System - Adjustment/Test

 C. Access
 (1)  
Location Zones
 203 Nose Wheel Well
 208 Forward Cargo Compartment
 218 Aft Cargo Compartment

 (2)  
Access Panels
 1104 Forward Toilet Panel
 1502 Toilet Service Door
 3105R Forward Nose Wheel Well Panel

 D. Procedure
 S 612-013
 (1)  Service the applicable toilet tank (AMM 12-17-00/301).
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
　
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