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 NOTE:____ The brake pressure gage of the hydraulic system should show approximately 3000 psi.
 (6)  S 213-007Push the brake pedals approximately six times and do a check on the precharge of the accumulator. (a) Fill the accumulator again if it is necessary.
 (7)  S 433-008Make sure swivel hexagon nut is tightened and replace the cap on the charge valve.

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 OXYGEN - SERVICING
__________________
 1.  General_______
 A.  This procedure gives the instructions for servicing the crew oxygen system by the procedures that follow:
 (1)  
Crew oxygen minimum dispatch pressure check

 (2)  
Crew oxygen servicing (cylinder replacement method)

 B.  The passenger oxygen system is serviced by the replacement of the chemical oxygen generator in each service unit (AMM 35-22-11/401).
 C.  Portable oxygen cylinders are serviced by the replacement of the cylinders with fully serviced cylinders. For the location of the portable oxygen cylinders refer to AMM 35-31-00/001.
 TASK 12-15-21-203-095
 2.  Crew Oxygen Minimum Dispatch Pressure Check (Fig. 301)___________________________________________
 A.  General
 (1)  Read and obey the safety precautions of the oxygen system and the general maintenance instructions before you do the maintenance (AMM 35-00-00/201).
 B.  Reference
 (1)  
AMM 12-15-21/301, Oxygen Servicing

 (2)  
AMM 35-00-00/201, Oxygen - Maintenance Practices

 C.  Access
 (1)  Location Zone
 102 Control Cabin, Right
 208 Forward Cargo Compartment, Right

 D.  Do the Crew Oxygen Minimum Dispatch Pressure Check
 S 213-096
 (1)  
Make sure the pressure shown on the crew oxygen cylinder pressure gage or the crew oxygen pressure indicator (Aft Overhead Panel) is above the minimum pressure necessary for dispatch.

 S 613-097

 (2)  
If the pressure is below the minimum pressure necessary for dispatch, do the crew oxygen servicing procedure (AMM 12-15-21/301).

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
BOTTLE TEMPERATURE `F`C  USING OXYGEN NUMBER OF CREW 32 
14-10  1090  1585 
23-5  1110  1615 
320  1130  1645 
415  1150  1675 
5010  1170  1705 
5915  1190  1735 
6820  1210  1765 
7725  1230  1795 
8630  1250  1825 
9535  1270  1855 
10440  1290  1885 
11345  1315  1915 
12250  1335  1950 

MINIMUM DISPATCH PRESSURE (PSI)
FOR 39 CUBIC FEET BOTTLE

Minimum Dispatch Pressure for Crew Oxygen Cylinder
Figure 301

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
M10196
A
737-300/400/500MAINTENANCE MANUAL
 TASK 12-15-21-603-007
 3.  Crew Oxygen System Servicing (Cylinder Replacement Method)
__________________________________________________________
 A.  General
 (1)  
Read and obey the safety precautions and the general maintenance instructions of the oxygen system before you do the maintenance (AMM 35-00-00/201).

 (2)  
Oxygen Requirements

 (a)  Oxygen that you use for the aircraft oxygen system must have the properties that follow: 1) The oxygen must contain no less than 99.5% oxygen by
　
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