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TM10-4330-235-13&P
MAINTENANCE OF GAGES, VALVES AND LINES
4-8. REPLACE DIFFERENTIAL PRESSURE GAGE
This task covers:
a. Removal
b. Testing
c. Installation
INITIAL SETUP
Tools
General Mechanic Tool Kit (Appendix B, Section Ill, Item 4)
Materials/Parts
Sealing Compound (Appendix E, Section II, Item 3)
Equipment Conditions
System Shut Down
General Safety Instructions
WARNING
Do not smoke within 50 feet (15.34 meters) of filter/separator.
REMOVAL
a. Provide a suitable container to receive fuel and open manual drain valve (1) to drain contents of
filter/separator.
b. Open air valve (2) to vent vessel.
c. Disconnect tube nuts (3) at elbows (11).
d. Remove screws (5), lock washers (6) and flat washers (7) to remove gage (8) from filter/separator.
e. Remove tube assemblies (4).
f. Remove elbow (9) and straight adapter (10) from gage (8).
TESTING
a. Apply a regulated air or hydrostatic pressure at the “IN” port.
b. Increase the pressure to the “IN” port slowly. The gage should indicate the applied pressures within ± 2
psi.
c. If indication is not in range, replace gage.
4-8
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