38-15-61
 ú ú 02 Page 403 ú Feb 10/96
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 AIR COMPRESSOR - REMOVAL/INSTALLATION
_____________________________________
 1.  General_______
 A.  This procedure includes two tasks:
 (1)  
The removal of the air compressor for the potable water system.

 (2)  
The installation of the air compressor for the potable water system (air compressor).

 B.  The installation of the air compressor includes an air leak check of the compressor.
 C.  The air compressor is above the ceiling panels just right of center at station 850 at the aft end of the forward cargo compartment.
 TASK 38-15-63-004-001
 2.  Air Compressor Removal (Fig. 401)______________________
 A.  References
 (1)  
AMM 25-52-01/401, Containerized Cargo Compartment Ceiling and Sidewall Linings

 (2)  
AMM 38-15-60/201, Water System Pressurization

 B.  Access
 (1)  Location Zone 124 Forward Cargo Container Compartment Aft Half, Right
 C.  Procedure
 S 864-002
 (1)  
Do this task: "Water System Depressurization" (Ref 38-15-60/201).

 S 014-003

 (2)  
For the ceiling panels in the area just right of center between stations 840 and 860, do this task: "Containerized Cargo Compartment Ceiling and Sidewall Linings - Removal" (AMM 25-52-01/401).

 (3)
Disconnect the electrical connector from the air compressor.

 S 034-005

 (4)  
Remove the clamp between the clamshell coupling and the air compressor.

 (5)  
Disconnect the clamshell coupling.

 S 034-007

 (6)  
Remove the screws and washers that attach the air compressor to the four mounts.

 S 034-004
 S 034-006
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 38-15-63
 ú ú 01 Page 401 ú Oct 10/93
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

747-400
MAINTENANCE MANUAL

WATER 
TANKS 
(REF) 
A 
AIR COMPRESSOR 
A  STA 
850 
FWD 
WATER SERVICE 
PANEL (REF) 
CLAMSHELL COUPLING 
COMPRESSOR  CLAMP  (CLAMP, SLEEVE, O-RINGS NOT SHOWN) 

ELBOW (4 LOCATIONS) SCREW, WASHER  A-A  MOUNT (4 LOCATIONS) 
Figure 401 Air Compressor Installation 

C25107
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 38-15-63
 ú ú 01 Page 402 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 024-008
 (7)  
Remove the air compressor together with the outlet line and elbow.

 S 034-009

 (8)
Disconnect the outlet line and elbow from the air compressor.

 TASK 38-15-63-404-019
 3.  Air Compressor Installation (Fig. 401)___________________________
 A. References
 (1)  
AMM 24-22-00/201, Manual Control

 (2)  
AMM 25-52-01/401, Containerized Cargo Compartment Ceiling and Sidewall Linings.

 (3)  
AMM 38-15-60/201, Water System Pressurization

 B. Access
 (1)  Location Zone 124 Forward Cargo Container Compartment Aft Half, Left
 C. Consumable Materials
 (1)  D00463 Lubricant - White Protopet 1S (WITCO Corp, New York, NY 07804)
 D. Prepare to Install the Air Compressor
 S 434-010
 (1)  
Connect the outlet line and elbow to the air compressor.

 S 034-020

 (2)  
Remove the old O-rings from the ends that connect at the clamshell coupling.

 S 164-021

 (3)
Make sure that the ends that connect and the sleeve are clean.

 S 644-022

 (4)  
　
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