SUJ Sprayer Manual - Master Manufacturing

SUJ Sprayer Manual - Master Manufacturing
180 Lake Ave North
Paynesville, MN 56362
Phone: 1-800-864-1649
Operations Manual
Lawn Sprayer (SLJ-01-0xxx)
Skid Sprayer (SUJ-01-0xxx)
Service the engine with gas and oil according to the
recommendations in the engine manual. Follow the engine
manufacturer’s instructions for starting and operating the
Check the inside of the tank for any foreign objects or
material that could cause damage to the pump.
Fill the tank with clean water. It is always better to have
the tank at least half full of water before adding the
chemical to avoid possible damage to the sprayer
components by an undiluted chemical concentrate.
Before initially running the sprayer, loosen the tee handle
of the relief valve. This adjustment should be checked
while spraying because a pressure increase will be noted
when the sprayer is shut off and the output of the pump is
by-passed back to the tank through the relief valve.
Limit the pressure to 150 psi. The maximum operating
speed of the pump is 2600 rpm. Excessive pressures
and/or operating speeds will reduce the life of the pump.
If, when adjusting the relief valve for more pressure, no
increase in pressure occurs, it is an indication that the
maximum output of the pump is being used. When the
sprayer is shut off the pump will have to overcome the
excessive tightness of the relief valve in order to by-pass
back to the tank. This will cause pump strain and possible
damage and should be avoided.
Choose an operating pressure that provides a spray pattern
suitable for the particular operation. Follow the chemical
manufacturer’s recommendations for mixing and rates of
application carefully. Judge the area sprayed by a tank full
of spray material carefully to avoid over or under
application rates. Do not use your sprayer for pumping
petroleum products, strong acids, paint or other thick
materials with heavy viscosity.
General Sprayer Maintenance
Most spray materials are highly corrosive. The most
important aspect of long dependable service from the
sprayer is a thought cleaning immediately following each
use. In addition, the residue of one type of chemical could
cause an undesirable effect when a different chemical is
used for a different purpose.
The most effective cleaning method is to pump several
rinses of clean water through the tank, pump, hose and
spray gun. A neutralizing agent such as a solution of NutraSol, detergent or household ammonia as recommended by
the chemical manufacturer can assist in removal of a
persistent chemical. Avoid getting chemical on the engine
and other external parts of the unit in order to preserve
the finish. Remove external spray material deposits when
cleaning and flushing unit. A coat of wax applied to the
exterior will protect the paint and make clean up easier.
When the unit is thoroughly cleaned, remove the tank filter
bowl and drain the water from the tank, spray gun, pump
boom and spray gun hose.
In the event of inefficient operation or malfunction, check
the following:
Clean the line strainer after each use or more
often, if necessary. A plugged strainer will
restrict the flow of liquid to the pump and
cause it to perform poorly. Always use clean
water and keep the strainer screen in place.
Sandy or gritty liquids will damage the
components of the pump.
2. Check the hoses for any kings or leaks. Avoid
letting a hose touch the engine muffler or be
subjected to other objects that could cut or
damage it. Be sure that suction hose is not
collapsed or plugged.
3. Check the spray gun for any obstructions,
especially the nozzles. Nozzle tips should be
removed and cleaned with a toothpick or
similar object. Avoid nails, wires, etc., that
could damage the tip opening. The nozzle
screens of the boom accessory should also be
removed and cleaned periodically. Inspect and
replace worn tips to insure satisfactory
spraying performance.
This sprayer should always be cleaned and drained before
storage. If the unit will be subjected to freezing
temperatures, it is imperative that the whole sprayer;
pump, hoses, spray gun, gauge, etc., be completely drained
and dry. Any water left in the system could cause
extensive damage when it freezes. Follow the
recommendations of the pump instructions for preventing
internal pump corrosion and protection against the rotor
and rollers gumming and sticking during storage.
Boom Operation
The spray nozzles used in the boom are marked with the
capacity in gallons per minute of water at a pressure of 40
psi. A 3 tip has a capacity of .3 gpm at 40 psi. A 5 has a
capacity of .5 gpm at 40 psi. etc.
The spray width coverage of the nozzle will vary according
to the pressure, and nozzle height. The wide angle flat
spray pattern increases as the pressure is increased.
The amount of material applied by the nozzle is changed by
variations in spraying speed, different capacity nozzles,
different nozzle spray width and spraying pressures. Other
factors such as a heavier or lighter (specific gravity)
spraying solution, a change in the chemical-water
concentration ratio, worn tip, a worn pump, wheel
slippage, a pressure drop from the gauge to the boom, and
a pressure gauge variation or malfunction can also cause
variations in the rate of application. Uneven coverage can
result from a clogged nozzle and a straining screen.
The spraying pressure is usually more in relation to the
type of application and the type of tip used than to the rate
of application. Since nozzle flow rate is almost
proportional to the square root of pressure, it would take
four times the amount of range from 10 to 40 psi. The rate
of application can be changed somewhat by changing
pressure but a considerable change is achieved by using a
different capacity nozzle or (if possible) by changing the
spraying ground speed.
Dividing the spraying width of the boom in feet into 1000
determines the travel distance required to cover 1000 sq.
ft. For example, an 80” spray width will cover 1000 sq. ft.
in 150 ft. of travel. Periodic calibration checks at the
spraying speed and pressure assure correct application
rates. The number of gallons required to refill the tank
after spraying (starting with a full tank) over a test distance
is the application rate for the area of the test distance.
Multiplying the application rate for the 1000 sq. ft. by
43.56 will determine the application rate per acre or
dividing the rate per acre by 43.56 will determine the rate
per 10000 sq. ft. If unknown, spraying speed can be
determined by measuring the distance travelled in one
minute. Every 88 ft. of travel is equal to 1 mph of speed.
For instance, a distance of 308 ft. in one minute divided by
88 equals 3.5 mph.
A calibration check can also be made with the unit standing
still and the boom spraying at the operation RPM an
pressure. Catching the output of the one nozzle for the
time it would take to travel the test distance and
multiplying by the number of nozzles on the boom will
yield the application rate. Water weighs 8.34 lbs. per
gallon. Spraying solutions heavier than water cause a
reduction in nozzle output, while solutions lighter than
water will increase the nozzle output.
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