(1)
Close the shutoff valve of the crew oxygen cylinder to a maximum torque of 25 pound-inches.
(2)
Make sure that the system shutoff valve on the P6 panel is open.
S 844-067
(3)
Push and hold the sliding control on the stowage box of the captain in the direction of the arrow.
S 844-068
(4)
Move the oxygen dilution control on the mask and regulator assembly of the captain to 100%.
S 844-066
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
COMPENSATOR)SEE
Pressure Reducing Regulator
Figure 401
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
S 844-069
(5)
Push and hold the emergency control knob.
S 844-070
(6)
Release the sliding control and the emergency control knob when the flow blinker changes from a yellow cross to all black.
F. Remove the Assembly
S 864-014
(1) Open this circuit breaker panel and attach a DO-NOT-CLOSE tag:
(a) P18 Circuit Breaker Panel
1) OXYGEN SYSTEM IND.
S 034-015
(2)
Disconnect the electrical connector of the pressure transducer.
S 034-016
(3)
Disconnect the supply line from the elbow of the pressure reducing regulator.
S 034-018
(4)
Loosen the coupling nut between oxygen cylinder and the cylinder coupling assembly.
S 024-019
(5)
Remove the assembly.
TASK 35-12-11-004-020
3. Remove the Cylinder Coupling from the Assembly
_______________________________________________
A. General
(1) Read the safety precautions and the general maintenance instructions of the oxygen system in 35-00-00/201, Oxygen.
B. References
(1) 35-00-00/201, Oxygen
C. Access
(1) Location Zone
113 Forward Cargo Compartment, Right
D. Procedure
S 034-021
(1)
Remove the assembly per paragraph 2.
(2)
Remove the pressure transducer from the cylinder coupling.
S 034-022
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
S 034-023
CAUTION:_______DO NOT USE THE TRANSDUCER OR THE COUPLING AS A LEVER. USE A WRENCH ON THE TRANSDUCER SQUARE BOSS AND ON THE COUPLING HEX NUT, OR DAMAGE TO COMPONENTS CAN OCCUR.
(3)
Remove the plug from the cylinder coupling.
S 024-024
(4)
Remove the cylinder coupling from the pressure reducing regulator.
TASK 35-12-11-004-025
4. Remove the Pressure Reducing Regulator from the Assembly_________________________________________________________
A. General
(1) Read the safety precautions and the general maintenance instructions of the oxygen system in 35-00-00/201, Oxygen.
B. References
(1) 35-00-00/201, Oxygen
C. Access
(1) Location Zone
113 Forward Cargo Compartment, Right
D. Procedure
S 034-026
(1)
Remove the assembly per paragraph 2.
S 024-027
(2)
Remove the pressure reducing regulator from the cylinder coupling.
S 034-028
(3)
Remove the elbow (together with the nut) and washer from the pressure reducing regulator.
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