(2)
Lubricate the six new O-rings that replace the old O-rings.

 (3)  
Install the six O-rings.

 S 432-026

 (4)  
Connect the check valve with the adapter to the outlet side of the filter.

 (5)  
Connect the adapter for the inlet side of the filter.

 S 642-058
 S 432-059
 S 432-060
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 S 422-027
 (6)  
Put the filter with the connected parts on the bracket.

 S 432-028

 (7)  
Install loosely the spacer, washer and screws that hold the air filter on the bracket.

 S 432-029

 (8)  
Install the two clamshell couplings.

 (a)  
Make sure the ends that connect are in line and not more than

 0.28 inch apart.

 (b)  
Move the sleeve until it is in the center of the connection.

 (c)  
Put the clamshell over the connection and latch the fasteners.

 S 432-030
 (9)
Tighten the screws that hold the air filter on the bracket.

 S 862-031

 (10)
 Do this task: "Water System Pressurization" (AMM 38-15-60/201).

 S 712-032

 (11)
 Make sure the flow is normal at the lavatory faucet.

 S 862-061

 (12)
 For the ceiling panels that were removed, do this task:  "Forward Cargo Container Compartment Ceiling and Sidewall Linings -Installation" (AMM 25-52-01/401).

 S 862-033

 (13)
 Do one of these tasks if it is necessary to pressurize the pneumatic system (AMM 36-00-00/201):

 (a)  
Pressurize the Pneumatic System with a ground air source.

 (b)  
Pressurize the Pneumatic System with the APU.

 (c)  
Pressurize the Pneumatic System with one or more engines.

 (14)
 Remove electrical power if it is not necessary (AMM 24-22-00/201).

 S 862-034
 TASK 38-15-64-002-035
 6.  Removal of Built-in Cleanable Compressor Inlet Air Filter (Fig. 201)_________________________________________________________
 A. General
 (1)  The built-in cleanable compressor inlet air filter is referred to as the inlet filter in this procedure.
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747-400
MAINTENANCE MANUAL

 B. References
 (1)  
AMM 25-52-01/401, Containerized Cargo Compartment Ceiling and Sidewall Linings

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

 C. Access
 (1)  Location Zone 124 Forward Cargo Container Compartment Aft Half, Right
 D. Procedure
 S 862-066
 WARNING: MAKE SURE YOU REMOVE THE PRESSURE FROM THE WATER PRESSURIZATION
_______ SYSTEM BEFORE YOU START TO REMOVE THE INLET FILTER. THIS REMOVES THE PRESSURE THAT IS IN THE WATER PRESSURIZATION SYSTEM. AIR THAT HAS HIGH PRESSURE CAN CUASE INJURY TO PERSONS.
 (1)
Do this task: "Water System Depressurization" (AMM 38-15-60/201).

 S 012-036

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

 S 012-037

 (3)  
Use an applicable wrench to loosen, turn and remove the inlet filter from the compressor.

 S 622-068

 (4)  
Put a plug in the air compressor to keep contamination out.

 S 032-038

 (5)  
Remove the snapring, the perforated disc, and the O-ring that holds the element in the housing.

 (6)  
Pull the element out of the housing.
　
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