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7
OPERATION
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 run-
ning 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.
6. 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.
7. Add the chemical solution to the tank, following
the product instructions.
8. Drive to the starting place for spraying. Set the
boom in position for spraying. Set the throttle at
the position determined in step 4. Reach back and
flip the pump/motor switch "ON" to start spraying.
9. Stay clear of flowers, shrubs and evergreen trees
when spraying weed control solutions to prevent
contact of the solution with these sensitive plants.
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 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 (60 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 is subject to continuous cycling
within one second intervals for long periods of time.
ADJUSTING OPERATING PRESSURE
The sprayer is equipped with a "Y" fitting containing a
bypass valve and a boom valve. The bypass valve
controls the flow to the return (bypass) hose. The
amount of flow 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" fitting controls flow 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" fitting.
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.
Control the spray gun operating pressure with the
bypass valve on the "Y" fitting. 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 figure 11.
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.
CAUTION: WEAR EYE PROTECTION,
GLOVES AND PROTECTIVE CLOTH-
ING WHEN HANDLING AND WORKING
WITH LAWN CHEMICALS.
FIGURE 11
80"
40"
14"