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 35-00-00
 ALL  ú ú 01 Page 302 ú Jul 15/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 OXYGEN SYSTEMS - CLEANING/PAINTING
__________________________________
 1.  General
_______
 A.  This procedure contains one task:
 (1)  Clean the oxygen system components.
 B.  When you do the installation and maintenance of the oxygen system, you must keep your work area clean. If your work area is not free of contamination, the conditions that follow can occur. When contamination that burns and ignition conditions are near oxygen, a fire or explosion can occur. Contamination on the external surfaces of a component can cause fires when oxygen leaks and ignition conditions are near. Contamination can prevent the components of the oxygen system from their correct operation. Contamination of the oxygen system can also supply dangerous fumes to the persons who use the oxygen equipment.
 NOTE: All the oxygen system components must be clean and dry when
____
 installed.

 TASK 35-00-00-107-001
 2.  Clean the Oxygen System Components
__________________________________
 A.  Equipment
 (1)  
Cylinder - portable test

 (2)  
Caps and plugs - package of clean, protective

 (3)  
Bags - polyethylene

 B.  Consumable Materials
 (1)  
G00669 Nitrogen per MIL-P-27401 (to be used with portable test cylinder) (or)

 (2)  
Air - clean, dry, with no particles or fibers greater than 100 microns in the longest dimension per cubic foot of air. It must not have no more than 3 PPM total hydrocarbon by weight or 7 PPM by volume. A moisture content not to exceed 0.00002 grams per liter of air at 70° F and 760 mm mercury. This is equivalent to a dew point of -63.6° F at 760 mm mercury. This air is to be used with a portable test cylinder.

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 35-00-00
 ALL  ú ú 01 Page 701 ú Jul 15/96
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 (3)  G00713 Cloth - Clean, Dry, Lint Free, White, Cotton
 C. References
 (1)  
AMM 20-30-96/201, Cleaning Solvents (Series 96)

 (2)  
AMM 35-00-00/201, Oxygen

 (3)  
AMM 35-12-61/701, Oxygen

 (4)  
OHM 20-30-03, Cleaning

 (5)  
OHM 20-70-01, Storage

 D. Access
 (1)  Location Zone
 208 Forward Cargo Compartment, Right

 E. Procedure
 S 917-011
 (1)  
Read and obey the safety precautions and general instructions before you do the maintenance (AMM 35-00-00/201).

 S 147-003

 (2)  
Use a clean and dry lint-free cloth to clean the components and the tubing of the oxygen system.

 S 117-004
 CAUTION: ONLY USE CLEANING SOLVENTS ON THE OUTSIDE OF THE COMPONENTS
_______ FOR AN INSTALLED SYSTEM. DO NOT USE CLEANING SOLVENTS ON THE INSIDE OF THE OXYGEN SYSTEM COMPONENTS.
 (3)  Remove contamination on the installed components, not in contact with the oxygen system using the steps that follow:
 (a)  
Use cleaning solvents (series 96) to remove the contaminants that remain (AMM 20-30-96/201).

 (b)  
Dry the component with a clean and dry lint-free cloth.

 S 167-006
 (4)  For airplane components not installed or any part of a component that will be in contact with system oxygen use the vapor degreasing method (OHM 20-30-03).
 NOTE: Before you clean the components, you must remove the
____
 components from the aircraft.

 (a)  Disassemble the components which include valves, regulators and oxygen cylinders.
 S 917-013
 (5)  Refer to the manufacturers overhaul manual to clean the components in the steps that follow:
 (a)  Clean the thermal compensators by the ultrasonic or the vapor degreasing procedure (AMM 35-12-61/701).
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