Stocks AG Fan Jet Duo, General Installation And Operation Instructions

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Fan Jet Pro - Operating Manual & Parts List P20
Basic Rule; The spread width is dependent upon the density of the granule or seed, and the disc speed (plus
other factors).
Large, dense granules and seeds with a high disc speed give the maximum spread width – small,
light granules and seeds will not spread as far.
Other factors affect the spread width:
Type of slug pellet. Typically, a large, dense hard pellet should spread further than a small, light, soft
pellet, because it is comparatively heavy and does not powder on the disc. Typically, a ‘ wet ’ produced pellet
will be hardest, a steam produced pellet mid range, and a dry produced pellet the softest. However, the line
between traditional
‘ mini ’ pellets and ‘ full size ’ is blurred as most are of similar size and some lower priced dry
produced pellets termed, as ‘ minis ’ are actually larger and heavier than more expensive wet produced pellets,
and can have a good spreading characteristics.
Seed varieties and dressings. Different varieties of seeds and seed dressings will have different densities
and so the affect the maximum spread width possible.
Wind Conditions. Dead calm conditions are the optimum; any wind will affect the width pattern.
High forward speed. The same as driving into a headwind of the same speed on a calm day, and this will
peel the edges of the spread pattern backwards and inwards.
Disc speed. If the Vario control console is used, altering the disc speed will affect the width and pattern.
A higher disc speed will give a wider spread width.
Disc vanes. Ensure they are in good condition and not worn excessively. Replace if necessary.
Part No. FJ009B includes 2 vanes and fixings (available through your local dealer)
Low disc height. Will not allow the product to reach its maximum width before gravity takes over.
Low electrical power. Will not allow the disc to reach full speed.
High application rates. Loads the disc more than a lighter rate and can slow it down.
Incorrect disc angle. It must be at least horizontal – not angled downwards.
Spread bias. This can be adjusted to centralise the pattern, left and right of centreline.
Adjustable deflectors. We do not recommend that these are used for in - field work but only for the headland
control on the outside bouts.
However it is possible to adjust them to restrict the width overall or just one side, but they may cause increased
breakage of the granules or seed damage.
Our advice would be to use them in conjunction with the Vario control panel where this is used to reduce the
disc speed and the deflectors positioned to help limit the spread width.
15.0 Spread Width and Pattern