Manual

9
USING THE SPRAYER
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 fi ll tank with more solution than needed.
3. 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 covered with each pass will
vary depending on the number of nozzles used, but
the amount of solution applied per square foot will not
vary as long as the same system pressure and speed
of travel are used. Refer to fi gure 18.
FIGURE 18
WIDTH OF SPRAY PATTERN USING 2, 3 OR 4 NOZZLES
CAUTION:
Wear eye protection, gloves
and protective clothing when handling and
working with lawn chemicals.
80"
160"
120"
OPERATION
BEFORE STARTING
It is important
to test the boom and spray gun with plain
water fi rst 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 fi tting.
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 fl ow 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" fi tting containing two
valves. The bypass valve controls the fl ow to the return
(bypass) hose. The amount of fl ow 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" fi tting controls the fl ow to all
the boom nozzles. It should be either completely open or
completely closed. The two valves located on the boom
will turn the fl ow 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 fi ne mist to a straight stream. The spray gun
operating pressure should be controlled using the bypass
valve on the "Y" fi tting. Maximum spray gun pressure can
be attained when the boom is shut off.