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6
OPERATION
CAUTION: WEAR EYE PROTECTION,
GLOVES AND PROTECTIVE CLOTHING
WHEN HANDLING AND WORKING WITH
LAWN CHEMICALS.
FIGURE 10
80"
40"
14"
BEFORE STARTING
It is important to test the boom and spray gun with plain
water before using chemicals. This will enable you 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 tting.
ON-OFF SWITCH
This switch is connected in line to the wiring assembly and
is used by the operator to turn the pump motor on or off.
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 (60 PSI). If the 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 is subject to continuous cycling
within one second intervals for long periods of time.
ADJUSTING OPERATING PRESSURE
The sprayer is equipped with a "Y" tting containing a bypass
valve and a boom valve. The bypass valve controls the ow
to the return (bypass) hose. The amount of ow through the
return hose determines the operating pressure when the
boom or the spray gun is in use. 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 9 shows how different pressure settings
affect boom application rates.
ON-OFF ADJUSTMENT OF BOOM NOZZLES
The boom valve on the "Y" tting controls ow to the boom
nozzles. It should be either completely open or completely
closed. The boom operating pressure can be controlled
using the bypass valve on the "Y" tting.
ADJUSTING SPRAY GUN NOZZLE
Turn the nozzle on the spray gun to adjust the spray from
a cone shaped ne mist to a straight stream. Control the
spray gun operating pressure with the bypass valve on the
"Y" tting. Maximum spray gun pressure can be attained
when the boom is shut off.
SETTING THE BOOM FOR SPRAYING
The correct positioning of the boom places the nozzles
approximately 40" apart and 14" above the ground. This
gives a spray width of approximately 80" with a slight center
overlap. See gure 10.
a. Slide the boom bars out to the ends of the
slots.
b. Swivel the boom bars until the nozzles are
approximately 14" above the ground.
c. Make sure the nozzles are adjusted so that the
openings point straight down.
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.
This can help avoid unneeded solution left in the tank.
3. Determine the appropriate speed at which to travel, based
on the chosen pressure setting and the recommended
application rate. Use the tip chart on page 9.
4. To determine the throttle setting for attaining the
appropriate speed, mark off 100, 200 and 300 feet
intervals. The speed chart at the bottom of page 9
indicates the number of seconds it takes to travel these
distances. Set the throttle and, with a running start, travel
the distances in the number of seconds indicated by
the speed chart. Once you have determined the throttle
and gear settings needed, mark the throttle location
so that you can easily resume the same speed after
stopping.
5. Set the operating pressure. Spray with plain water to
help determine the best setting. For best results stay
in the 20 to 30 PSI range. (At 10 PSI the spray pattern
begins to break up, at 40 PSI some drift develops.) Refer
to the tip chart on page 9.
6. Add the chemical solution to the tank, following the
product instructions.
7. Drive to the starting place for spraying. Set the boom
in position for spraying. Set the throttle at the position
determined in step 4. Flip the sprayer's in-line switch to
the "ON" position to start spraying.
8. Stay clear of owers, shrubs and evergreen trees when
spraying weed control solutions to prevent contact of
the solution with these sensitive plants.