10
NOTE: There may be a noticeable difference
between pressure shown on main spray
pressure gauge on sprayer and the gauge
installed on the boom. This is due to pressure
loss through the circuit.
1. Check the plumbing system for kinked or
obstructed hoses and repair or replace any
hoses that restrict the normal flow of the
liquid.
2. Start your sprayer
a. For sprayers not fitted with a spray
application controller, set the boom
operating pressure to the pressure at
which you expect to spray.
b. For sprayers fitted with a spray application
controller, initiate a ‘self test’ procedure
and set the application rate and speed to
the settings depicted in your “Rate Chart”
at which you expect to spray.
3. Then place the jug under one of the
nozzles, for 60 seconds (exactly) and then
record the volume of liquid collected.
4. Repeat the test over a representative
sample of the jets in each boom section
5. Compare the volume collected from each
nozzle to the stated volume in your rate
chart. It should be no more than plus or
minus 10% of the volume stated in your
Nozzle Supplier’s rate chart
6. In the event that any of your nozzles do
not deliver the required volume, a further
investigation is required which may
include, but not be limited to:
a. Cleaning the nozzles, using the method
recommended by the nozzle supplier.
b. Replacing the nozzles.
c. TeeJet advise that nozzles that flow
greater than +10% of their stated volume
are ‘worn out’ and should be replaced.
d. Cleaning nozzle filters.
e. Replacing filters.
f. Replacing pump diaphragms.
g. Replacing the pump.
h. Ensuring that the application rate
required does not exceed the maximum
flow and pressure parameters of the
sprayer.
Filters
General Information
WARNING:
Ensure that operator’s wear the appropriate
PPE when cleaning filters. It is essential to
maintain all filters, and filter screens, in good
condition. Filter screens that are not regularly
cleaned can severely impede the flow and thus
affect delivery pressure.
If the screen is in any way damaged, it can
allow foreign material into the pumping
system which can result in damage to the
pump, solenoids, valves and nozzle tips. If
the screen is not properly fitted, it can allow
air into the pumping lines which will reduce
the performance of the pump. The filter
screen should be cleaned after every spraying
operation. The best way to clean the filter
screen is with a soft brush or compressed air
after washing the entire chemical residue from
the pump.
Safety Shut-Off Valve
The safety shut off valve enables the filter bowl
to be removed while automatically shutting off
the supply line to the filter. As the filter bowl is
removed (with the bowl cap), the valve plunger
seats so as to seal off the filter from the supply
line. Replacing the filter bowl unseats the valve
plunger and thus opens the supply line to the
filter.
Suction filter
To clean the suction filter:
1. Wear all necessary protective clothing;
2. Ensure the pump is turned off
3. Carefully unscrew filter nut and remove
bowl;
4. Remove screen and clean (with a soft
brush or compressed air);
5. Check for damage to screen, bowl,body
and ‘o’ ring;
6. Place screen back in position;
7. Make sure ‘o’ ring is in position for proper
seal;
8. Replace bowl and screw nut on;
9. Do not over-tighten nut.