Note time before performing step (8) since application rate can only be determined if
dispersal time is known.
(8) Note time and set SYSTEM switch to ON. Check for hydraulic leaks, that EMPTY indicator is not lit, and that
pressure gage on secondary hydraulic manifold assembly indicates 300 psi.
(9) Press DISPERSAL pushbutton. After pre-determined time is up, release DISPERS.AL pushbutton and set
SYSTEM switch to OFF.
Measure amount of material collected in bucket and calculate application rate (para 2-10, f). If
application rate is incorrect, proceed with step (11). If application rate is correct, proceed with step (13).
Make sure muffler and engine are cooled down before attempting assembly,
disassembly, or adjustments. Hot muffler and engine components can cause burns.
Adjust metering plate as necessary to increase or decrease application.
Repeat steps (8) through (11) until application rate is correct.
When adjustment is complete or if EMPTY indicator lights, set SYSTEM switch to OFF, POWER switch
to OFF, and key on engine to OFF.
Make sure metering plate fasteners are tightened after adjustment.
Position slinger assembly under tank and secure to brackets.
Adjusting Application Rate.
The following paragraphs provide procedures for computing the application rate needed to apply a desired amount of
pesticide evenly over a defined area. Factors to consider are: amount of pesticide that must be applied, air speed and
altitude of helicopter, effective swath width of application, and, for LV system application, the gpm for each nozzle. The
amount of pesticide to be applied to a given area is determined by the type of pesticide used, the terrain and foliage of
the application area, and the target pest. Nozzle selection and system calibration procedures are contained in Appendix
(1) LV and ULV Systems Adjustment. The required information is gallons (pints) per application (gpa), gallons
applied per minute (gpm), helicopter speed (mph), swath width (SW), number of nozzles (NOZ), and boom
pressure (psi). The first calculation should be swath width (SW). Swath width can vary for different types of
pesticides, ULV system spraying, and different altitudes.