4.10 REPLACE INLET OR OUTLET UNISEX COUPLING.
This task consists of:
Tool Kit, General Mechanics
Petrolatum (Appendix F, Item 2)
(Appendix B, Section III, Item 1)
Wiping rag (Appendix F, Item 7)
Chemical and Oil Protective Gloves
O-Ring (Appendix I, Item 5)
(Appendix B, Section III, Item 2)
O-Ring (Appendix I, Item 3)
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.
Rubber gloves should be worn when handling fueling system components due to
the toxic effects of some fuel additives.
a. Removal. (Figure 4-7)
Remove ball retaining screw (1) and O-ring (2). Discard O-ring (2).
Place a wiping rag beneath the coupling (3) and, with the screw hole facing toward the wiping rag, rotate the
unisex coupling (3) back and forth to allow the 41 balls (4) to fall into the wiping rag.
There is a small ball and spring in the inlet that are used to maintain electrical
continuity. The ball and spring will pop out when the coupling is separated from
the inlet. Coupling removal must be performed in a way that captures the
continuity ball and spring.
Pull the unisex coupling (3) from the inlet (5). Collect the continuity ball (6) and spring (7).
Remove and discard inlet O-ring (8).
b. Installation. (Figure 4-7)
Lightly lubricate inlet O-ring (8) with petrolatum and install in second (square) groove (9) on inlet (5).