Section II. VALVED QUICK-DISCONNECT COUPLING
balls in the valved coupler half which engage in a groove
8-6. General
on the valved nipple half. The balls are retained in place
by a sleeve on the valved coupler half. Sliding the sleeve
A valved nipple (36, fig. 4-9) is attached to the liquid
away releases the balls, allowing the coupling halves to
loading tube (41). The valved nipple (fig. 8-2) contains a
disengage. When disconnected, springs within each
poppet which is spring-loaded closed against a seat
coupling half return the respective poppets to the closed
within the body. The valved nipple forms the male half of
position. A dust cap and dust cover are attached to the
a quick-disconnect coupling. A valved coupler forms the
valved nipple and valved coupler, respectively, by steel
female half of the quick-disconnect coupling and is part
cables. The dust cap and cover are used to cover the
of the liquid loading system (ch. 11). When the coupling
open ends of the coupler to protect them from dirt,
halves are mated, valves within each half of the coupling
grease, and other contaminants.
force each other open. The coupling is held together by
Figure 8-2. Valved quick-disconnect coupling.
following specific checks:
8-7. Removal
(1) Check threaded parts for crossed or
otherwise damaged threads.
Remove the valved nipple from ground loading tube of
(2) Check condition of teflon seals on valve
the insecticide sprayer as described in paragraph P16,
assemblies for cuts or contamination with foreign
step c.
particles.
(3) Check seating surfaces within nipple and
8-8. Cleaning and Inspection
coupler for nicks, scratches, or other damage.
c. Discard valved nipple or coupler if either is
a. Clean all parts of the valved quick-disconnect
found not to be usable.
coupling thoroughly to remove spray fluid residue, dirt,
lubricants, and other contaminants.
b. Inspect condition of all parts.
Make the
Section III. TANK ASSEMBLY
internal baffles provided for strength and to reduce
8-9. General
sloshing of fluid within the tank during flight. The tank is
translucent with fluid level markings on each end. A fluid
The tank assembly (125, fig. 4-9) consists of a
level gage is mounted on the front side. Fluid level within
cylindrical, molded fiberglass tank with attachment
the tank can be seen through the tank material. In
fittings for components connected to the tank. The tank
addition, connectors for components attached to the tank
has a 200-gallon capacity and is a molded fiberglass
are permanently attached.
reinforced polyester resin structure. It contains two
8-5
