11
Operation
The 438K applicator is very simple to operate. After installing the applicator, fill the tank with 5 gallons of
water. With control box connected to the applicator and the power cord hooked to the 12-volt battery we can
start the test. First flip on the toggle switch. You might hear the buzzing of the motor. Turn the dial on the
control box until the gauge starts to climb. By turning the dial clockwise, the pressure will go up. By turning
the dial counterclockwise, the pressure will decrease. With the applicator spraying at about 30 PSI, look for
leaks at all the hose connections and fittings. Using water in this step instead of chemical will save you from
wasting chemical and making a mess if leaks are found. When you are comfortable with the operation of the
controls you can set the applicator to the amount of chemical you would like it to put on.
Message Light
The LED under the speed dial will be steady on when the applicator is running under normal situations. If the
light blinks on and off use the below information for the message.
Slow steady on and off blink:
The system is attached to hay indicators (474A) or a foot switch. This
message means that the pump is paused. The light will come on constant once the baler is back in the
windrow.
Two quick blinks:
The pump motor or pump harness is shorted.
Three quick blinks:
Pump motor is over the current limit (10 amps).
Four quick blinks:
Power is under current from a bad connection.
The control box must have the on/off switch toggled to clear the message after the fault has been fixed to
clear.
