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Craftsman 486.24533 Owner's Manual page 8

25 gallon 70 psi sprayer
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HOW TO USE YOUR SPRAYER
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 predeter-
mined 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 13.
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
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.
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.
Determine the appropriate speed at which to travel,
based on the chosen pressure setting and the recom-
mended application rate. Use the tip chart on page 9.
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 deter-
mined the throttle and gear settings needed, mark the
throttle location so that you can easily resume the
same speed after stopping.
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.
Add the chemical solution to the tank, following the
product instructions.
Drive to the starting place for spraying. Set the boom
in position for spraying. Set the throttle at the position
determined in the fourth paragraph. Reach back and
flip the pump/motor switch "ON" to start spraying.
Stay clear of flowers, shrubs and evergreen trees
when spraying weed control solutions to prevent
contact of the solution with these sensitive plants.
CAUTION:
WEAR EYE PROTECTION,
GLOVES AND PROTECTIVE
CLOTH-
ING WHEN HANDLING
AND WORK-
ING WITH LAWN CHEMICALS.
I •
80 =°
FIGURE 13

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