TASK 35-12-21-004-001
 2.  Remove Pressure Transducer (Fig. 401)__________________________
 A. General
 (1)  Read the safety precautions and the general maintenance instructions of the oxygen system in 35-00-00, Maintenance Practices.
 B. Standard Tools and Equipment
 (1)  Caps or Plugs - Package of Clean Protective
 C. References
 (1)  35-00-00/201, Oxygen
 D. Access
 (1)  Location Zone
 113 Forward Cargo Compartment, RH

 E. Bleed System Pressure
 S 844-002
 (1)  
In the forward cargo compartment, close the shutoff valve of the crew oxygen cylinder.

 S 844-003

 (2)  
Make sure that the system shutoff valve on the P6 panel is open.

 S 844-004

 (3)  
Push and hold the sliding control on the stowage box of the captain in the direction of the arrow.

 S 844-005

 (4)  
On the mask/regulator of the captain move the oxygen dilution control to 100%.

 (5)  
Push and hold the emergency control knob.

 S 844-007

 (6)  
Release the sliding control and the emergency control knob when the flow blinker changes from a yellow cross to all black.

 S 844-006
 F. Remove Pressure Transducer
 S 864-011
 (1)
Open this circuit breaker panel and attach a DO-NOT-CLOSE tag:

 (a)  P18 Circuit Breaker Panel
 1) OXYGEN SYSTEM IND.

 (2)  
Disconnect the electrical connector from the pressure transducer.

 S 034-012
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 35-12-21
 ALL  ú ú 01 Page 401 ú Nov 15/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL

COUPLING HEX NUT
PRESSURE TRANSDUCER
ASSEMBLY

A

Pressure Transducer
Figure 401

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 35-12-21
 ALL  ú ú 01 Page 402 ú Feb 20/84
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 S 024-013
 CAUTION: DO NOT USE THE TRANSDUCER BODY OR THE COUPLING BODY AS A LEVER.
_______ USE A WRENCH ON THE TRANSDUCER SQUARE BOSS AND ON THE COUPLING HEX NUT, OR DAMAGE TO COMPONENTS MAY OCCUR.
 (3)
Remove the pressure transducer from the cylinder coupling.

 S 034-014

 (4)  
To prevent contamination of the system components, seal ports and lines with plugs or caps.

 TASK 35-12-21-404-015
 3. Install Pressure Transducer (Fig. 401)
___________________________
 A. General
 (1)  Read the safety precautions and the general maintenance instructions of the oxygen system in 35-00-00, Maintenance Practices.
 B. Consumable Materials
 (1) G00092 Compound - Oxygen system leak detection (AMM 20-30-51/201)
 C. References
 (1)  
AMM 24-22-00/201, Maintenance Practices, Electrical

 (2)  
AMM 35-00-00/201, Oxygen

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

 E. Procedure
 S 434-016
 (1)  Remove the caps and plugs from the ports and lines.
 S 424-017
 CAUTION: DO NOT USE THE TRANSDUCER BODY OR THE COUPLING BODY AS A LEVER.
_______ USE A WRENCH ON THE TRANSDUCER SQUARE BOSS AND ON THE COUPLING HEX NUT, OR DAMAGE TO COMPONENTS MAY OCCUR.
 (2)  
Install the pressure transducer on the cylinder coupling.

 S 434-018

 (3)  
Tighten the pressure transducer on the cylinder coupling to 170 pound-inches.

 (4)
Connect the electrical connector to the pressure transducer.

 (5)  
Supply electrical power (AMM 24-22-00/201).

 S 434-019
 S 844-020
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