14
Operation
Open the Mix n’ Fill ball valve to allow the chemical to be
drawn into the pump. Close the Mix n’ Fill ball valve once
the tank is empty to prevent an air leak on the suction side
of the pump.
With the return ball valve open, let the pump circulate the
solution for several minutes. Rinse the Mix n’ Fill tank and
draw the rinse water into the spray tank. Raise and lock the
Mix n’ Fill tank in the transport position. Close the return
line ball valve before starting to spray.
Other Spray Trailers:
Add chemical to other spray trailers by pouring the desired
amount of chemical in the spray tank through the fillwell.
Open the spray tank valve and the agitator valve. Start the
pump and mix the chemical thoroughly.
Operating The Sprayer
The 8420 boom is equipped with lock bars to prevent
boom movement during transport. The lock bars should
be lowered before operation to allow the boom to self-level
during operation.
The boom must always operate perpendicular to the
ground. Failure to do this can cause excessive yaw
movement and can damage the boom.
Levelling Trailer Sprayers
Adjust the drawbar clevis on trailer units to level the spray
trailer. Set the boom to the desired spraying height by
adjusting the parallel linkage.
Levelling The Boom On 3 Point Units
Set the 3 point hitch on 3 point mounted units at the desired
boom spraying height. Adjust the top link to level the boom
while in the spraying position. (See Figure B13)
Activating The Sprayer
If you are using an automatic controller, refer to the owner’s
manual for instructions on setting the controller for the
desired spray volume and speed.
Figure B12
Trailer Should Run Level
Figure B8
Partially Closing Main Valve for Chemical Induction
Figure B10
Adding Chemical to LCS Trailer
< return & agitator valves open
< main valve partially open
Figure B9
Opening Mix n’Fill Valve
Mix n’Fill valve >
lock bars
lock bars
Raise for Transport Lower for Operation
Figure B11
8420 Boom Lock Bars
