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 35-12-31
 ALL  ú ú 01 Page 405 ú Nov 15/90
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 DISCHARGE INDICATOR DISK - REMOVAL/INSTALLATION
_______________________________________________
 1.  General_______
 A.  The discharge indicator disk, at the overboard discharge port, blows out when pressure builds up in the overboard discharge line. This normally happens only when the cylinder discharges through the safety relief device. If the disk has blown out, the following procedure must be done for replacement.
 TASK 35-12-51-004-001
 2.  Removal of the Indicator Disk (Fig. 401)_____________________________
OXYGEN DISCHARGE

Discharge Indicator Disk Installation
Figure 401

EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 35-12-51
 ALL  ú ú 02 Page 401 ú Nov 15/90
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 A. General
________
 (1)  Read the safety precautions and the general maintenance instructions of the oxygen system in AMM 35-00-00/201, Oxygen.
 B. References
 (1)  AMM 35-00-00/201, Oxygen
 C. Access
 (1)  Location Zone
 113 Forward Cargo Compartment, Right

 D. Procedure
 S 024-002
 (1)  
Remove the snap ring from the indicator.

 S 024-003

 (2)  
Remove the damage plastic disk or the particles.

 TASK 35-12-51-404-004
 3.  Installation of the Indicator Disk (Fig. 401)__________________________________
 A. General
 (1)  Read the safety precaution and the general maintenance instructions of the oxygen system in the AMM 35-00-00/201, Oxygen.
 B. References
 (1)  AMM 35-00-00/201, Oxygen
 C. Access
 (1)  Location Zone
 113 Forward Cargo Compartment, Right

 D. Procedure
 S 424-005
 (1)  
Put the plastic disk in the port.

 (2)  
Install the snap ring.

 S 424-006
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 35-12-51
 ALL  ú ú 01 Page 402 ú Nov 15/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 THERMAL COMPENSATOR - ADJUSTMENT/TEST
_____________________________________
 1.  General________
 A.  The thermal compensator is an integral part of the cylinder coupling assembly. The thermal compensator is removed/installed with the cylinder coupling assembly (AMM 35-12-11/401).
 B.  The test is done after the thermal compensator is cleaned. The test is used to find blockages that would prevent gas flow through the units.
 TASK 35-12-61-785-001
 2.  Thermal Compensator Test________________________
 A.  General
 (1)  
Read the oxygen safety precautions and the general maintenance instructions in AMM 35-00-00/201, Oxygen.

 (2)  
Thermal compensators are tested after cleaning to determine if there are restrictions that would prevent adequate gaseous flow through the units. Satisfactory compensators will permit a flow of 1000 liters per minute of air with a pressure drop of less than 200 psi for an inlet pressure of 2000 psi. The test unit is locally fabricated from the materials listed.

 B.  Standard Tools and Equipment
 (1)  Portable test cylinder - filled with air or nitrogen at 2000 |100 psi.
 NOTE: Use nitrogen per MIL-P-27401; or air with no particles or
____ fibers greater than 100 microns in the longest dimension per cubic foot of air, no more than 3 PPM total carbon by weight or 7 PPM total CH4 by volume, and with moisture content not exceeding 0.00002 grams per liter of air at 70°F and 760 MM mercury (equivalent to a dew point of -63.6°F at 760 MM mercury).
　
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