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TM 10-4930-250-13&P
5
7
3
2
4
1
Figure
4-9.
Removal
and
Installation
of
Two-Inch
Non-Valved
Unisex
Coupling.
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.
Work over a wiping rag.
(1) Lightly lubricate inlet 0-ring (6) with petrolatum and install in second (square) groove of inlet (5).
(2) Place spring (7) in unisex coupling.
(3) Slide the unisex coupling (3) onto the inlet (5). Hold unit over a wiping rag with screw hole facing up and adjust
position until ball race (rounded groove) is centered under screw hole. Install balls (4) one at a time, rotating unisex
coupling back and forth until all 41 balls (4) have been inserted.
(4) Install ball retaining screw (1) and 0-ring (2) in unisex coupling (3). Tighten retaining screw.
4-24
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