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D.  Air filter (in-line type)
E.  Compressed air source (regulated 80 psig, 15 scfm minimum)
3.  Water Tank Pressure Regulator Test (Fig. 501)
A.  Remove pressure regulator (AMM 38-41-52/401).
B.  Using schematic in figure 501 as a guide, connect equipment and pressure regulator to a regulated clean oil-free source of compressed air.
C.  Close control valve.
D.  Verify zero psig reading on pressure gages.
E.  Gradually open pressure regulator, monitor gages as pressure increases.
F.  Increase upstream pressure to 60 to 65 psig the downstream pressure should be:
(1)  
25 ±2.5 psig for the 1552-002-9 pressure regulator.

(2)  
35 ±2.5 psig for the 1552-002-19 pressure regulator.

G.  If the downstream pressure is not in the pressure range noted above, replace pressure regulator.
H.  Reduce pressure to zero.
I.  Install pressure regulator on airplane (AMM 38-41-52/401).
May 01/00 38-41-52 Page 501 B
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L15413
Pressure Regulator Test  500 
38-41-52  Figure 501  May 01/00 
Page 502 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

 

　
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