4.9 REPLACE DEFUELING COUPLING ASSEMBLY.
This task consists of:
Tool Kit, General Mechanics
Thread Sealant (Appendix F, Item 5)
(Appendix B, Section III, Item 1)
Tape, Teflon (Appendix F, Item 6)
Chemical and Oil Protective Gloves
(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.
Using dry cleaning solvents incorrectly can cause
injury or even death.
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. (Figure 4-6)
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 filter vessel (3).
Place drain pan beneath defueling unisex coupling (4). Open unisex coupling valve and drain residual fuel from
filter vessel (3).
Dispose of fuel in accordance with local SOP.
Remove defueling coupling assembly (4) from filter vessel sump (5).