OPERATION
BEFORE STARTING
It is important to test the boom and spray gun with
plain water first to check the sprayer for leaks and to
set the spray pattern and nozzle pressure. If a leak
should occur, thread tape may be used to better seal
the fitting.
PUMP PRESSURE SWITCH
The pump is equipped with a pressure switch. The
pressure switch senses outlet pressure of the pump
and will turn off the electrical power to the pump at a
predetermined high pressure point (45 PSI). If the
flow demand is very low, the pump may reach this
high pressure point and the switch will cause "cycling"
(the pump cycles on and off rapidly). This is not a
problem unless the pump continuously cycles within
one second intervals for long periods of time.
ADJUSTING OPERATING PRESSURE
The sprayer is equipped with a "Y" fitting containing
two valves. The bypass valve controls the flow to the
return (bypass) hose. The amount of flow through the
return hose determines the operating pressure of the
boom or the spray gun. Adjust the bypass valve while
either the boom or the spray gun is in use to obtain the
desired pressure, indicated by the pressure gauge.
The tip chart on page 11 shows how different pressure
settings affect boom application rates.
ON-OFF ADJUSTMENT OF BOOM NOZZLES
The boom valve on the "Y" fitting controls the flow to
all the boom nozzles. It should be either completely
open or completely closed. The two valves located on
the boom will turn the flow on or off to each outside
nozzle. Each valve should be set either completely
open or completely closed.
ADJUSTING SPRAY GUN NOZZLE
Turn the nozzle on the spray gun to adjust the spray
from a cone shaped fine mist to a straight stream. The
spray gun operating pressure should be controlled
using the bypass valve on the "Y" fitting. Maximum
spray gun pressure can be attained when the boom is
shut off.
USING THE SPRAYER
[&
CAUTION: Wear eye protection, gloves
and protective clothing when handling
and working with lawn chemicals.
1 ,
Determine the application rate (gallons per 1,000
sq. feet or gallons per acre) based on the chemical
manufacturers recommendations. Use this rate to
help select the pressure setting and tractor speed
in the following instructions.
2.
Determine the approximate square footage of the
area to be sprayed and estimate the number of
gallons required. Do not fill tank with more solu-
tion than needed.
,
Decide how wide a swath you wish to spray with
each pass. Use just the two inside nozzles, or the
two inside nozzles plus one outside nozzle, or use
all four nozzles. The number of square feet cov-
ered with each pass will vary depending on the
number of nozzles used, but the amount of solu-
tion applied per square foot will not vary as long as
the same system pressure and speed of travel are
used. Refer to figure 19.
WIDTH OF SPRAY PATTERN USING 2, 3 OR 4 NOZZLES
FIGURE 19
(12 pages)
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