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TM 10-4930-250-13&P
10
11
5
1
42
7
6
8
3
Figure
4-3.
Three
Inch
Unisex
Coupling
NOTE
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.
(3) Separatethe unisex coupling (3) and inlet (5). Collect the continuity ball (6) and spring (7).
(4) Remove and discard inlet 0-ring (9).
b.
Installation.
Rubber gloves should be worn when handling fueling system components due to the toxic effects of
some fuel additives.
NOTE
When inserting balls in unisex coupling ball race, use caution to avoid dropping loose balls.
Recommend working over a wiping rag.
(1) Lightly lubricate inlet 0-ring (8) with petrolatum and install in second (square) groove (9) of inlet (5).
NOTE
Due to the possibility of losing the continuity ball and spring, the following step is best performed
inside a container if possible.
(2) Start the unisex coupling (3) onto the inlet (5). Install continuity spring (7) and ball (6) into hole in inlet (5) and hold
in the compressed position while completing installation of unisex coupling (3) onto inlet (5).
4-11
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