Foam Marker - Goldacres MY17-19 Operator's Manual

Foam Marker

NOTE: This information applies to the Exacta foam
marker system supplied with MY17 machines. For
information on the MY19 fitted Salvarini foam
marker system, see supplementary documentation.
Operation
Open the water valve 6 turns and open the
concentrate valve in quarter turn intervals up to 2
turns until the correct foam consistency is reached.
Then, open the water valve to a total of 12 turns
and open the concentrate valve up to a total of
4 turns. Allow up to 5 minutes for each needle
adjustment to take effect.
To successfully use the Exacta foam marking
system, it is essential to observe the following
points:
1. Make sure that initially all ball valves on the
external water delivery station are turned OFF.
2. If filling of the main spray tank is not required at
the same time, turn the red handle on the fill ball
valve OFF.
3. Connect the fresh water fill hose to the quick-fill
coupling.
4. Operate the fresh water pumping system (make
sure pressure does not exceed 200 kPa).
5. Take the lid off the foam marker water tank.
6. OPEN the 'foam marker fill' valve. Fill the Exacta
foam water tank with only clean soft water.
7. Continue to bottom-fill the foam tank until the
desired amount has been transferred.
8. When the desired amount of water has been
transferred to the foam tank, turn the 'foam
marker fill' valve OFF.
9. Re-fit the lid to the foam marker water tank.
10. Turn the fresh water pumping system off.
11. Fill the concentrate tank with only Goldacres
foam concentrate.
12. All adjustments of the control valve should be
within plus or minus ½ a turn or similar.
13. Always allow sufficient time for the altered foam
to come out of the accumulator.
14. If the foam is too runny, close the water valve
slightly, if the foam is stiff and has air holes, open
86 - Chapter 12 - Optional Accessories
the water valve slightly. Loose foam is desirable
when spraying in crops where the foam needs to
sit on top of the crop in order to be visible. Tight
foam is desirable when the foam needs to be
visible for an extended period of time and when
the spraying conditions are relatively hot and
windy.
15. Regularly inspect the foam marker lines, to ensure
they are free of foreign matter.
16. Periodically remove and clean the water filter.
The foam marker filter is located underneath the
foam marker tank. To remove the filter, ensure
the appropriate protective clothing is being worn.
Close the foam tank ball valve, loosen the brass
screen, remove the filter and clean.
17. Periodically check the condition of the one-way
valve in the compressor/diverter unit.
WARNING: Ensure that the foam marker water
tank lid is screwed on loosely to prevent pressure
build up in the tank.
NOTE: If either the water tank or the foam
concentrate tank empties, it's possible that flow from
the other tank (foam water or foam concentrate)
can siphon into the empty tank. To prevent this,
as soon as either the foam water tank or foam
concentrate tank empties, shut the ball valve at the
bottom of both tanks. Re-fill the tanks prior to the
next spraying operation. Regularly check valves.
Bleeding the concentrate line when the foam
concentrate tank empties:
If the foam concentrate tank empties, it will take a
few minutes for the concentrate to feed through the
lines to the compressor/diverter unit. To reduce this
time, the concentrate can be bled to minimize water
wastage.
1. Close the concentrate needle valve ½ turn at a
time and record the number of turns until the
needle valve is closed.
2. Open the needle valve several turns more than
the previous setting.
3. When the concentrate comes through, fully close
the concentrate needle valve and then re-open
the valve to the setting recorded from step 1.
Prairie 1500-3000L Operator's Manual MY17-MY19 - REV 0