OPERATIONAL CHECK (Continued)
Check the temperature.
Check the flowmeter scale reading.
Hold a beaker under the insecticide stream for one minute.
Turn OFF the ignition and solenoid valve switches.
(10) Pour the insecticide from the beaker into a graduated cylinder and measure the volume of
insecticide that flowed in one minute.
Figure 5-206. Flowmeter Scale
Figure 5-207. Temperature Correction Curve
(11) Find the flow rate in oz/min on the graph (pages 1-9 through 1-13)
flowmeter scale reading. Use the graph provided for the insecticide being sprayed. Figure 5-207 illustrates how to use
the temperature correction curves.
If the flow rate from the graph is the same as the measured flow rate, the flowmeter is
If the flow rate from the graph is 10% different from the measured flow rate, check the
meter tube, the flow meter control valve, and the temperature gage for damage or plugging.
Check the engine speed. Use a hand-held tachometer.
(1) Start the engine according to operating instructions in Chapter 2, Section III.
The belts should be connected to the pulleys while checking the engine speed.
(2) Check the engine operating speed with a hand-held tachometer. Refer to page 1-6 for the
correct rpm ratings. If the speed is not correct, adjust the governor.