Adjust fittings so that no kinks or twists exist.
4-15.
Hoses
(2) Low-pressure hoses.
Use tire soap to
a. General. Three high-pressure hoses and four
lubricate inside ends of low-pressure hoses.
Place
low-pressure hoses are used on the insecticide sprayer.
hose clamps over hoses before installing. Slip ends of
Refer to figure 4-9 and 4-10 for locations. The
hoses onto mating connections, and secure hose clamps
high-pressure hoses (14 and 42, fig. 4-9, and 22, fig. 4-
using a screwdriver only.
10) are attached by MS28741 medium pressure,
(3) Plastic overflow tube. Install
plastic
detachable end fittings. Low- pressure hoses (13, 21, 23,
overflow tube (64, fig. 4-9) to tank installation as follows:
and 30, fig. 4-9) are attached by low-pressure hose
(a) Install end of plastic tube over
clamps. A plastic tube is used as a tank vent and
adaptor (111) at top of tank. Secure with hose clamp
overflow tube. The plastic tube (64) is secured to the
(63).
adaptor (111) with a low-pressure hose clamp. The
(b) Route tube over back of tank and
other end is attached to the center boom tube by a pair
around outside of tank support, to pump side of tank
of clamps (61 and 62).
installation.
b. Maintenance and Adjustment.
Inspect
(c) Fasten tube to center boom tube (81)
hoses for condition and for security.
Adjust
high-
at approximately 2 inches inboard from boom tube
pressure hoses to remove any kinks or twists. To do
coupling nut. Wrap 3/4-inch black electrical tape, or
so, loosen hose end connections, or rotate mating
equivalent, around tubes at clamp locations.
Place
connectors or elbows as required.
clamp (62) around center boom tube, and clamp (61)
Note:
around plastic tube.
Threaded connectors must be rotated in a tightening
(d) Secure ends of clamps together,
direction only, as loosening may cause a leak. You
using bolt (60) and nut (59).
may find it necessary to remove connectors and apply
Note:
fresh teflon tape per Military Specification MIL-T-27730,
Insert screw through clamps from top.
to stop a leak.
c. Removal.
(1) Remove
high-pressure
hoses
by
4-16.
Valved Nipple and Dust Cap
unscrewing end fittings from mating connections.
a. General. One valved nipple (36, fig. 4-9)
(2) Remove low-pressure hoses by loosening
with dust cap (35) is attached to the liquid loading tube
hose clamps, and slipping hose ends from connections.
(41). It forms the male half of a quick disconnect
(3) Remove plastic overflow tube as follows
coupling used for connecting the ground liquid loading
tube hose for loading operations. When disconnected,
(a) Loosen hose clamp (63) and slip end
an internal valve closes, sealing off the liquid loading
of tube (64) from adapter (111).
tube and preventing the tank from draining. The
dust
(b) Remove nuts (59) and bolts (60)
cap (35) is attached to the valved nipple body by a steel
from clamps (61 and 62) securing tube to center boom
cable. The dust cap is used to protect the valved nipple
tube.
from dust and other contaminants which might cause the
(c) Remove clamps and black tape
valved nipple to leak.
(placed around tubes beneath clamps) from both tubes.
b. Maintenance. Inspect the valved nipple and
d. Cleaning and Inspection.
Clean interior and
dust cap for leaks. Clean the valved nipple and dust cap
exterior portions of hoses and plastic tube to remove
to remove any foreign matter which may get caught in
spray fluid residue, dirt, and other foreign matter.
the valve and cause leakage.
Clean threads of high-pressure hose connectors.
c. Removal. Unscrew the valved nipple from the
Inspect condition of hoses, connectors, and hose
liquid loading tube using a wrench.
Do not remove
clamps. Replace any hoses, connectors, or clamps
dust cap from valved nipple unless required for
found not serviceable.
replacement.
e. Installation. Install hoses in same position
d. Installation. Clean the threads of liquid
from which removed.
Replace any components found
loading tube. Wrap a thin layer of teflon tape per military
not serviceable.
Clean mating connectors before
specification- MIL-T-27730 around pipe threads. Tighten
installing to remove dirt, grease, tape, and other foreign
valved nipple to liquid loading tube with wrench.
matter. Install hoses as follows:
(1) High-pressure hoses.
Apply a suitable lubricant to
4-17.
Strainer
threads prior to installation of high pressure hoses.
a. General. A strainer assembly (119, fig.
4-
Mate the connectors carefully to avoid stripping
9) is located at the top of the tank assembly (125)
threads. Tighten connectors handtight only, using a
wrench.
4-21
