Calibrating The Boom Bypass Valves - Toro 41582 Operator's Manual

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Figure 21
1. Valve open
2. Lynch pin
3. When the tank has drained completely, install
the valve to frame with the lynch pin removed
previously and close the drain valve (Figure 21).
4. Fill the tank with at least 50 US gallons (190 L) of
clean fresh water and close the cover.
Note: You can use a cleaning/neutralizing agent in
the water as needed. On the final rinse, use only
clean, clear water.
5. Lower the booms into the spray position.
6. Start the engine and move the throttle lever to a
higher idle.
7. Ensure that the agitation switch is in the On
position.
8. Set the pump switch to the On position and use the
application rate switch to increase the pressure to
a high setting.
9. Set the master boom switch and boom control
switches to the On positions to begin spraying.
10. Allow all of the water in the tank to spray out
though the nozzles.
11. Check the nozzles to ensure that they are all
spraying correctly.
12. Set the master boom switch to the Off position,
set the pump switch to the Off position, and stop
the engine.
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3. Valve closed
13. Repeat steps 4 through 12 at least 2 more times to
ensure that the spray system is fully cleaned.
Important: You must always complete this
procedure at least 3 times to ensure that the
spray system is fully clean, preventing damage
to the system.
14. Clean the strainer; refer to Cleaning the Suction
Strainer in Cleaning section.
Important: If you used wettable powder
chemicals, clean the strainer after each tank.
15. Using a garden hose, rinse off the outside of the
sprayer with clean water.
16. Remove the nozzles and clean them by hand.
Replace damaged or worn nozzles.
Calibrating the Boom Bypass
Valves
Important: If you have the Pro Control™ Spray
System installed, the boom bypass valves must be
closed. Use the following adjustment only when
you are not using the Pro Control Spray System.
Before using the sprayer for the first time or if the
nozzles are changed, adjust the boom bypass valves so
that the pressure and application rate remains the same
for all booms when you turn one or more booms off.
Note: The boom bypass valves must be calibrated
each time the nozzles are changed.
Select an open flat area to perform this procedure.
1. Fill the spray tank with clean water.
2. Put the extension booms down, if installed.
3. Set the parking brake and start the engine .
4. Move the throttle lever to the Spray position.
5. Set the pump switch to the On position to start
the pump.
6. Set all three boom switches and the master boom
switch to the On position.
7. Use the application rate switch to adjust the pressure
as read on the pressure gauge until it is in the range
for the nozzles you installed on the booms (typically
40 psi).
8. Record the reading on the pressure gauge.
9. Turn off one of the booms using the appropriate
boom switch.
10. Adjust the boom bypass valve (Figure 22) under the
boom control valve for the boom you turned off
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