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A.  Brass Drift Pin (locally procured)
3.  Removal (Fig. 401)
A.  Remove PS3 line from pressure ratio bleed control.
B.  Remove connector and retaining ring from bleed control housing. Remove O-Ring from connector and discard.
C.  From opposite end of bore remove retaining ring, screen and retaining ring which secures venturi.
D.  Place suitable drift against venturi and drift venturi with metering plug from bleed control housing. Remove O-ring from metering plug and O-ring from venturi. Discard O-rings.
4.  Installation
A.  Check that bleed control housing, venturi, screen, retaining rings, metering plug and O-rings are clean and free of dirt, grit and moisture.
CAUTION: DIRT, GRIT AND MOISTURE MAY DAMAGE PREFORMED PACKING.
B.  Lubricate O-ring with petrolatum and place in groove of venturi. Seat venturi in bleed control housing. Secure venturi with retaining ring. Install screen and secure with retaining ring.
C.  Lubricate O-ring with petrolatum and place in groove of metering plug. Seat plug in bleed control housing and secure with retaining ring.
D.  Lubricate O-ring with petrolatum and install on connector. Install connector in bleed control housing and tighten.
E.  Connect PS 3 line to pressure ratio bleed control.
501 
Jun 20/83  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  75-31-12 Page 401 

Pressure Ratio Bleed Control Metering  501 
75-31-12  Plug Installation  Sep 20/82 
Page 402  Figure 401 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

 

　
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