D. Prepare for the Pressure Check
 S 216-005
 (1)  
Make sure the relief valve is closed.

 S 446-006

 (2)  
If the relief valve is open, do this task: "Close the Relief Valve Manually".

 S 486-007

 (3)  
Install the F80166 test fixture on the relief valve.

 (a)  Remove four of the eight mounting screws which attach the relief valve to the access panel. 1) Remove these screws and make sure the remaining screws have
 equal angles of 90 degrees between them.
 NOTE: The remaining screws are the corners of a square.
____
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH THE PRESSURE RELIEF VALVE ú

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
MANUAL MANUAL

SURGE TANK ACCESS SURGE TANK ACCESS PANEL (NO. 13) PANEL (NO. 13)
PRESSURE RELIEF VALVE PRESSURE RELIEF VALVE (KNOB TYPE) (T-HANDLE TYPE) (VALVE CLOSED POSITION) (VALVE CLOSED POSITION)
Surge Tank Flame Arrester Pressure Relief Valve Manual Reset
Figure 601

EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH THE PRESSURE RELIEF VALVE ú

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL

PRESSURE RELIEF VALVE
TEST FIXTURE F80166

Surge Tank Flame Arrester Pressure Relief Valve Actuation Pressure Check
Figure 602 (Sheet 1)

EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH THE PRESSURE RELIEF VALVE ú

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

737-300/400/500MAINTENANCE MANUAL
GLOBE SHUTOFF

SHOP AIR INPUT
LEAK TRACING DEVICE F71329

Surge Tank Flame Arrester Pressure Relief Valve Actuation Pressure Check
Figure 602 (Sheet 2)

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M91844
A 
737-300/400/500MAINTENANCE MANUAL
 (b)  Put the test fixture against the relief valve.
 NOTE:____ The MS29513-154 O-ring seal is part of the test fixture
 assembly.
 1)  Make sure the MS29513-154 O-ring seal is installed in the
 flange groove of the test fixture.
 2)  Make sure the O-ring has a good seal in all positions.
 (c)  Attach the test fixture to the relief valve.
 NOTE:____ The MS16998-31 screws are part of the test fixture
 assembly.
 1)  Put four MS16998-31 screws in the positions of the four
 usual mounting screws that you removed before this step.
 ú
 ú  S 486-008
 ú  (4)  Attach the hose of the pressure gage or manometer to the adapter
 fitting at the bottom of the F80166-1 test fixture.
 (a)  Make sure there are no air leaks in the hose or the fittings.
 S 486-009
 (5)  Connect the F80166-1 hose assembly to the F71329 leak tracer.
 NOTE:____ You use the F71329 leak tracer only to adjust and control
 the pressure on the relief valve.
 ú  (a)  To put positive pressure on the pressure relief valve, do these
　
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