S 424-062
 CAUTION:_______MAKE SURE YOU INSTALL CAPS ON THE SENSE LINE AND PORT. IF YOU DO NOT INSTALL THE CAPS, CONTAMINATION CAN OCCUR.
 (13)
 Install caps on the sense line and the PRSOV port.

 (14)
 Move the sense lines to permit removal of the valve.

 S 864-067
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL PRSOV BRACKET 
SEE  A 
PRSOV  FWD B SENSE LINE DOWNSTREAM PRSOV 

PRSOV SENSE LINE DOWNSTREAM 
SEE B  PRECOOLER 
Pneumatic Disconnects on the PRSOV - Left Side Figure 403 1. COUPLING PRSOV A 2. E-SEALCOUPLINGS ON 5TH-STAGE DUCT 5TH-STAGE DUCT  FWD 

E54256
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 S 024-068
 (15) Remove the valve.
 NOTE: You can only remove the valve from the right side of the
____
 engine.

 S 024-083
 (16) Remove the union fittings, tee and O-rings from the PRSOV.
 (a)  Discard the used O-rings.
 S 024-084
 (17)
 Remove the PRSOV bracket from the PRSOV and save it for installation on the replacement PRSOV.

 S 034-065

 (18)
 Put covers on the openings for the duct and the precooler to keep out unwanted objects.

 TASK 36-11-15-404-017
 3. Install the PRSOV (Fig. 401-405)
_________________
 A. Consumable Materials
 (1)  
D00006 - Antiseize Compound, NEVER SEEZ (AMM 20-30-21/201)

 (2)  
O-rings (P/N BACP11K-6, 2 required)

 (3)  
O-ring (P/N BACP11K-5, 1 required)

 B. References
 (1)  
AMM 36-05-00/201, Pneumatic System

 (2)  
AMM 36-11-05/501, Engine Bleed Air Distribution System

 (3)  
AMM 71-11-04/201, Fan Cowl Panels

 (4)  
AMM 78-31-00/201, Thrust Reverser System

 C. Access
 (1)  
Location Zones
 502/503 Fan Cowl - Left Nacelle
 504/505 Thrust Reverser - Left Nacelle
 602/603 Fan Cowl - Right Nacelle
 604/605 Thrust Reverser - Right Nacelle

 (2)  
Access Panels
 5737/5837 Fan Cowl Assy
 5738/5838 Thrust Reverser Cowl Assy
 5739/5839 Thrust Reverser Cowl Assy
 5746/5846 Fan Cowl Assy

 D. Prepare to Install the Valve (Fig. 404)
 S 434-066
 (1)  Install the PRSOV bracket on the PRSOV, if the previously removed PRSOV had a bracket attached to it.
 (a)  Install the bolts and washers to secure the PRSOV bracket to the PRSOV.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
SEE A
BOLT 
WASHER 
(2 LOCATIONS) 
BOLT 
WASHER 
(2 LOCATIONS) 
PRSOV BRACKET 
(EXAMPLE)
UNION FITTING  O-RING  FWD 
O-RING  UNION 
PRSOV  FITTING  TEE 

PRSOV ASSEMBLY
O-RING
UNION
(EXAMPLE)  CAP 1
FITTING
A
ON AIRPLANES WITHOUT DOWNSTREAM
SENSE LINE TO BLEED AIR REGULATOR.
Pressure Regulating and Shutoff Valve Installation
Figure 404

E55067
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