Great Plains TA520S Operator Manual - Manual (Page 24)

1993-1995 Tandem Axle Sprayer
500-061M 3/18/2005
22
Plumbing Operations {Manual Con-
trol System Only}
The basic plumbing diagrams are shown for both the
stainless steel tank sprayer and the polyethylene tank
sprayer. 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 com-
ponents 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.
1. Fluid is drawn out of the sump in the tank and pass-
es through the pump. From the pump it passes
through the solution whirlfilter
® and filters out or
grinds up all undissolved chemical and solid parti-
cles. The fluid then passes through the agitation ball
valve or proceeds through the electric pressure ad-
justment 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 by-
passes back into the pump inlet.
You can monitor the nozzle pressure gauge and ad-
just 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 adjustment 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 adjust-
ment valve down so that the nozzle pressure 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.
The agitation can be set by adjusting the agitation pres-
sure valve while the pump is at operating speed. Adjust
the valve until you get the desired agitation pressure you
would like on the agitation pressure gauge.
There are tank shut off valves everywhere there is an
outlet from the tank so that if there is a leak, the source
can be shut off and the chemical spill reduced. These
valves need to be wide open when the sprayer is in use.
Plumbing Diagrams Stainless Steel Tank
{Manual Control System Only}
Plumbing Diagrams Polyethylene Tank
{Manual Control System Only}
11500
11501