MIL-DTL-82068D
3.6 Performance.
3.6.1 Sprayer performance. The pump shall maintain a steady flow rate of pesticide or
water at the gpm specified in table I, at the manufacturer' s recommended continuous operating
pressure (hereafter referred to as the operating pressure). The operating pressure at the discharge
outlet of the pump shall be no less than specified in table I under operating pressure (psi). The
pressure in the high pressure section of distribution piping shall be easily determined from the
gage reading. The pump, piping system, hose, fittings, connections, and valves shall be designed
for the operating pressure of the unit as furnished, and for surges up to 125 percent of the
operating pressure without leakage, seepage, or bursting. The spray gun discharge pattern shall
be consistent and steady throughout the range from fine mist to a steady stream at the operating
pressure. When the spray boom is required (see 3.7.10), it shall be easily adjusted for height. All
spray boom nozzles shall discharge pesticide in an identical pattern. The agitation system shall
maintain a homogeneous mixture of pesticide emulsion or suspension without signs of
precipitate stratification at any point in the tank.
3.6.2 Trailer performance. The fully equipped and serviced trailer, complete with all
attachments, accessories, and between 50- and 75-percent liquid load capacity, when towed by a
towing vehicle at average speeds of 40 miles per hour (mph) over improved roads, and 20 mph
over dry unimproved roads, shall develop no signs of damage, malfunction, or misalignment.
Shifting of the liquid load shall not produce a noticeable tendency to upset.
3.7 Design and construction. The design shall be such as to prevent conditions that may
be hazardous to personnel or deleterious to equipment. Particular attention shall be given to
features contributing to long periods of service without interruption for adjustment and repair.
The equipment design and accessory installation shall permit accessibility for service and
maintenance in the field. The sprayer, trailer, attachments, and accessories shall be assembled as
an integral operating unit, with a maximum of simplicity and compactness, and a minimum of
weight consistent with the rugged performance requirements, but not greater than specified in
table I, fully equipped without liquid load. Calculated design loads shall be computed using a
liquid load equivalence of 8.3 lb per gallon. The center of gravity of the trailer shall be forward
of the axle. The load on the landing leg and hitch, with the sprayer fully loaded for operation,
shall be not less than 200 lb and not more than 300 lb. Ground clearance shall be not less than
10 inches. Provisions shall be made for complete drainage of the tank and piping system without
need for disassembly. Special tools, if required for service in the field, shall be furnished.
Flexible connections, hose sections, inserts, and mountings shall be used in all places where
vibration or shock might cause damage.
3.7.1 Sprayer arrangement. A level work platform with protective railing shall be
provided. A hood with open sides, or other adequate weather protection over the engine, pump,
pesticide pressure regulator, pressure gage, and controls shall be provided. The hose reel and
hose gun rack assembly shall be mounted on the hood or atop the tank. When required (see
3.7.10), a spray boom shall be mounted on the rear of the trailer.
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