4.16 REPLACE DIFFERENTIAL PRESSURE GAUGE AND/OR INLET AND OUTLET LINES.
This task consists of:
a. Removal of lines
b. Installation of Lines
c. Removal of Gauge
d. Installation of Gauge
Tool Kit, General Mechanics
Thread sealant (Appendix F, Item 5)
(Appendix B, Section III, Item 1)
Cloth, Lint Free (Appendix F, Item 1)
Chemical and Oil Protective Gloves
Washer, Lock (Appendix I, Item 16)
(Appendix B, Section III, Item 2)
Goggles (Appendix B, Section III, Item 2)
General Safety Requirements:
Liquid fuel filter-separator removed from
AAFARS. (TM 10-4930-250-13&P, para. 2.8.)
Fuels are toxic and flammable. Do not get on person
or clothing. Do not use near open flame. Area
should be well ventilated.
Fuel is flammable. Do not smoke.
Death or personal injury may result from the explosion of fuel fumes exposed
to an open flame or spark, or to static discharge. Do not permit smoking, any
open flame, or spark producing equipment within fifty (50) feet of the liquid fuel
filter-separator. Ensure all equipment is well grounded prior to commencing
any operation or maintenance task.
Rubber gloves should be worn when handling fueling system components due
to the toxic effects of some fuel additives.
Serious eye and skin injury could occur from venting of fuel when manual vent
valve is opened. Wear suitable protective clothing and eye protection.
This procedure assumes that the liquid fuel filter-separator has been defueled.
However, some fuel will remain in the diverter cavity after defueling.
a. Removal of Inlet and Outlet Lines. (Figure 4-12)
Connect the liquid fuel filter-separator grounding cable (1) to a ground rod.
Depress and latch open the manual vent valve (2) to relieve any pressure from the filter vessel (3).
Drain fuel from diverter cavity into a suitable container by removing filter vessel gravity drain plug (4).
Dispose of fuel in accordance with the local SOP.
Loosen and separate flare nuts (5) on both sides of the differential pressure gauge (6) and on the inlet and outlet
port connectors (7, 8) of the filter vessel (3).
Blow through the lines to ensure they are clear.