(2)  
AIPC 21-51-05 Fig. 2

 (3)  
AIPC 21-51-00 Fig. 5

 (4)  
AIPC 21-51-00 Fig. 5A

 (5)  
AIPC 21-51-00 Fig. 6

 (6)  
AIPC 21-51-00 Fig. 6A

 (7)  
AIPC 21-51-00 Fig. 7

 (8)  
AIPC 21-51-00 Fig. 7A

 B. Access
 (1)  
Location Zone
 133 Air Conditioning Equipment Bay, LH
 134 Air Conditioning Equipment Bay, RH

 (2)  
Access Panel
 192H-R Air Conditioning Access Door
 191N-L Air Conditioning Access Door

 C. Prepare for the Removal
 S 862-019
 (1)  Make sure the applicable (1, 2, or 3) PACK selector, on the overhead panel, P5, is in the OFF position.
 (a)  Put a DO-NOT-OPERATE tag on the selector.
 S 012-020
 (2)  Open the applicable access door (Ref 06-09-03/201):
 -192H-R for pack 3
 -191N-L for pack 1 or 2
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 21-51-05
 ALL  ú ú 03 Page 204 ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

747-400
MAINTENANCE MANUAL

PACK 2 
WATER SEPARATOR
PACK 1  SEE  A 
WATER SEPARATOR  COUPLING2. 
SEAL3. 
SEE  A  A 
SEE  B 
WATER SEPARATOR1. 

VENT 
FWD  PACK 3 WATER SEPARATOR SEE A  A  DRAIN HOSE4. 
EQUIPMENT BAY AIR CONDITIONING  SEAL COUPLING BSEE 6. 5.  A  WATER DRAIN BOSS 
ELASTIC BAND COALESCER (INTLET) PRESSURE BOSS DIFFERENTIAL  DOWNSTREAM COALESCER RETAINING RING 1  (OUTLET) PRESSURE BOSS DIFFERENTIAL 
RING RETAINING COALESCER  COUPLING (OUTLET) COUPLING (INLET) 5. 2. 
AIR IN  AIR OUT 
DUCT 
RELIEF VALVE COALESCER 
RING LOOP RETAINING  A-A  SEAL (OUTLET) SEAL (INLET) 6. 3. 
1  ALL WATER SEPARATORS MAY NOT BE INSTALLED ON  B 
Water Separator Installation Figure 201 

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 21-51-05
 ALL  ú ú 01 Page 205 ú Feb 10/96
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 D. Remove the Water Separator
 S 032-021
 (1)  
Disconnect the water drain hose (4) from the drain tube connection (approximately 18 inches (0.45 meters) from the water separator).

 S 032-023

 (2)  
Remove the couplings (2, 5) at each end of the water separator (1).

 S 022-024

 (3)  
Remove the water separator (1).

 TASK 21-51-05-102-062
 4. Water Separator Cleaning
________________________
 A. General
 (1)  This procedure has the instructions to clean the coalescer bag in the water separator. One water separator is in each air cooling pack.
 B. Equipment
 (1)  Blow Dryer or a Clean, Dry Cloth
 C. Consumable Materials
 (1)  Solution - Warm Water and Mild Soap
 D. Access
 (1)  
Location Zone
 133 Air Conditioning Equipment Bay, LH
 134 Air Conditioning Equipment Bay, RH

 (2)  
Access Panel
 192H-R Air Conditioning Access Door
 191N-L Air Conditioning Access Door

 E. Procedure
 S 022-042
 (1)  
Do the Water Separator Removal task.

 S 032-043

 (2)  
Remove the coalescer bag from the water separator:

 (a)  If it is installed, remove the downstream coalescer retaining ring from the water separator.
 NOTE: Use the loop on the ring to pull it out of the water
____
 separator.

 (b)  
Cut and remove the lockwire from the coalescer retaining ring near the inlet of the water separator.
　
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