Great Plains TM700 Operator Manual - Manual (Page 26)

Tractor Mount Sprayer
500-052M 5/13/2003
24
Operating Instructions
Basic Sprayer Operating
Procedures
1. Make sure to read the label on the chemical com-
pound that is to be applied. It is the law.
2. Consider how the chemical will be stored and how
you will dispose of the chemical, according to the
chemical label.
3. When calibrating, filling the tank, or working around
chemicals, wear protective clothing that covers the
body. Refer to "Personal Safety Equipment" on
page 5. Have soap and clean water available to
wash any exposed areas. Never open a container
with your bare hands.
4. When filling the sprayer, it is better to mix the chem-
ical in the field where it is to be applied. Position the
sprayer 100 feet from any well or other water source
BEFORE mixing chemical.
5. By law, you must repeat the rinsing of the chemical
container 3 times. The container should then be
punctured to prevent future use. An alternative is to
jet-rinse or pressure rinse the container.
6. Check the condition of hoses and connections fre-
quently. Release system pressure BEFORE work-
ing on the sprayer by shutting off the pump and
flipping the individual boom section switches on the
control box. ALWAYS wear rubber gloves when
making repairs or adjustments.
7. If equipped with level-float boom, remove the level
float pin and place in the storage position after un-
folding the boom. Refer to your Great Plains Boom
Manual for more information.
Note: If possible, do not operate your Great Plains
Sprayer Boom without first unlocking the level-float pin.
The boom will float over the contours of the ground more
effectively and minimize stress on the boom.
8. Apply spray when the wind is 5 m.p.h. or less. Mini-
mize drift by using nozzle tips with the largest prac-
tical openings and by operating the sprayer boom at
the lowest practical height and lowest practical pres-
sure.
9. Drive at the same speed you used in your calibra-
tion. Refer to "Sprayer Calibrations" on page 28.
Keep your sprayer calibrated.
10. If possible work crosswise to the wind, starting from
the downwind side of the field. Do this so you won’t
ever be heading directly into chemical fumes.
11. Take note of adjoining crops, houses, gardens, peo-
ple, etc.
12. When you are finished spraying, empty the tank and
flush the sprayer with water, including the pump, the
nozzles and the bypass line from the solenoids.
Properly store the chemical emptied from the tank or
dispose of it by the recommendations on its label.
13. When turning at the end of a field, make sure you
are correct on the rows so that the boom will not
overlap on crop previously sprayed.
Plumbing Operations {Manual Con-
trol System Only}
The basic plumbing diagrams are shown for the tractor
mount plumbing. A basic knowledge of how the sprayer
is plumbed will help you to understand how to operate
you Great Plains Sprayer. Throughout this manual, the
components on this diagram will be described with the
terminology labeling these components. For further de-
tails about the plumbing components, refer to the parts
manual.
Fluid is drawn out of the sump in the tank and passes
through the pump. From the pump it passes through the
solution Whirlfilter
® and filters out or grinds up all undis-
solved chemical and solid particles. The fluid then
passes through the agitation ball valve or proceeds
through the electric pressure adjustment ball valve. If the
fluid passes through the electric ball valve, it proceeds to
the 3-way solenoid valves. If a solenoid valve is on, the
fluid passes to its perspective boom section and is
sprayed out the individual nozzles. If that solenoid is off,
the fluid bypasses back into the pump inlet.
You can monitor the nozzle pressure gauge and adjust
the pressure to the booms by adjusting the pressure
switch on the control box. The pressure switch rotates
the electric ball valve. To decrease the sensitivity of the
pressure adjustment switch the manual pressure adjust-
ment valve must be set. To set this valve, run the pump
at the same rpm you would when spraying. Open the
electric ball valve completely and adjust the manual
pressure adjustment valve down so that the nozzle pres-
sure gauge reads 10 to 20 psi greater than the pressure
you will spray at. This will decrease the amount of flow to
the electric ball valve and reduce its sensitivity.
Note: When pressure is increased at a later date, the
manual pressure adjustment valve will need to be
opened.