Calibrating The Boom Bypass Valves; Pump - Toro 41178 Multi-Pro 1200 Operator's Manual

15. When the distance is displayed, use the Increase or
Decrease calibration buttons to change it to 500
feet (or 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 levers and the master spray lever
to the On position.
9. Use the application rate knob 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 lever.
12. Adjust the boom bypass valve (Figure 28) 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.
1. Boom bypass valves
13. Turn the boom on and off to verify the pressure
does not change.
14. Repeat steps 11 through 13 for the other booms.
15. Drive the sprayer at the desired speed while spraying
and turn each boom off individually. The pressure
on the gauge should not change.

Pump

The pump is located near the front of the tank on the
right side (Figure 29).
1. Pump
2. Grease fitting
Adjusting the Air Pressure in
Dampener
The air pressure in the dampener on the pump is
set at 15 psi (1 bar) by the manufacturer. This is
recommended for nozzle spray pressures between 20
32
Figure 28
Figure 29
3. Pressure dampener