21HARDI
®
N-SERIES 3-PT SPRAYER DIAPHRAGM OPERATOR'S MANUAL
4.5 Adjustment of the EC-3 Electric Controls
Boom Operation
1. Choose the correct nozzle. Make sure that all nozzles are the same
type and capacity. Refer to section 5.0 for nozzle selection and
calibration.
2. Locate your sprayer in a suitable location to spray water from the
boom. Fill the tank with clean water (see section 4.1).
3.
Turn the Pressure Control Valve 1 (Fig. 12) counter clockwise all the
way out.
4. Set Master On/Off boom switch 5 and individual boom switches 6
(Fig. 12) "ON". Set spraygun valve 4 (Fig. 12) "OFF".
5. With the tractor in neutral, engage the P.T.O. to start the pump.
Adjust the R.P.M.'s to normal operating speed.
6. Increase pressure by turning Pressure Control Valve 1 (Fig. 12)
clockwise. Adjust until the pressure gauge 2 (Fig. 12) reaches the
desired pressure (turn Pressure Control Valve counter clockwise to
decrease pressure).
SPRAYER CONTROLS:
1. Pressure control valve
2. System Pressure gauge
3. Agitation valve
4. Spraygun valve (optional)
CONTROL BOX:
5. Master On/Off Switch
6. Distribution Switches
1
2
3
4
6
5
Fig. 12
ON
OFF
SPRAYGUN
VALVE
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