Calibrating The Boom Bypass; Valves - Toro 41177 Multi-Pro 1250 Operator's Manual

8. Turn the selection dial to the Distance position.
9. Press and hold the Reset calibration button
until the display reads "0".
10. When you reach the start point, press the
master boom switch to start the distance
tracking with the monitor. Drive the machine
from the start point you marked to the 500 feet
(150 m) end point.
11. When you reach the end point, set the master
boom switch to the Off position to stop the
monitor.
12. Look at the distance displayed on the monitor.
• If it reads "500 feet (150 m)", you do not
need to calibrate the monitor any further.
• If it does not read "500 feet (150 m)",
continue with the rest of this procedure.
13. Set the parking brake.
14. With the selection dial set to the Distance
position, press and hold the Calibrate button
until the monitor displays "CAL HOLD" and
the red light on the monitor illuminates.
The display will alternate between the distance
value ("HOLD" shown) and the speed
calibration value ("CAL HOLD" shown).
15. When the distance value is displayed, use the
Increase or Decrease calibration buttons to
change it to 500 feet (150 m).
16. When the display begins alternating again,
the speed calibration value will have changed;
write this number down and save it. This is the
calibration value for your sprayer.
17. Press the Calibrate button until the red light
turns off. You can also exit calibration mode
by driving the sprayer.
Resetting an OFL Condition
If the monitor reads "OFL", it indicates that you
have exceeded the monitor screen dimensions.
Press and hold the Reset calibration button to set
the display to 0.

Calibrating the Boom Bypass

Valves

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. Set the dial on the Spray Pro monitor to
Application Rate.
5. Place the range selector in the Neutral position.
6. Press the accelerator to the floor and set the
neutral engine speed lock switch to the On
position.
7. Set the pump switch to the On position to
start the pump.
8. Set all three boom switches and the master
boom switch to the On position.
9. 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/2.75 bar).
10. Record the reading on the pressure gauge.
11. Turn off one of the booms using the
appropriate boom switch.
12. Adjust the boom bypass valve (Figure 30)
under the boom control valve for the boom
you turned off until the pressure reading on
the gauge is the same as it was in step 9.
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