LOFTNESS OS 170, Owner'S Manual And Parts Book

Page: 23 / 76

15 OS 170 Fertilizer Spreader OM
Mechanical Ground Drive (Cont’d)
Adjusting for High or Low Range
(Mechanical Ground Drive)
1
3
4
2
Determine if the application will be spread in high range
or low range.
Loosen the conveyor drive chain tensioner (1) and move
the chain (2) to the appropriate set of sprockets.
High range - The chain must wrap around the upper
sprocket (3).
Low range - The chain must wrap around the lower
sprocket (4).
Reposition the drive chain tensioner and retighten.
IMPORTANT: Read the application rate chart for
operating in high range. To avoid undue
stress on the conveyor mechanism, it is
recommended to use the largest practical
gate opening in low range before
changing to high range.
To assure a uniform application rate around field edges,
make a border application with these adjustments.
Reduce to 1/2 fan speed, gate opening, and travel
interval.
CAUTION:
Do not use a gate setting of
1.5 in. (3.81 cm) in high range. This could
cause undue stress on the hopper from a high
conveyor speed.
Set-up and Operation
Spreading Speed and Interval
Speed
When spreading for a test pattern and for the final field
application, maintain a speed of 3-8 mph.
Driving Interval
Test Pattern Interval: Driving interval is 25 ft.
(7.62 m), depending on machine, to maintain an accurate
spreader constant and spread pattern.
Field Application Interval: Determine optimum driving
interval by following the steps below.
NOTE: The spreader is designed to spread the material
25 ft. (7.62 m) to each side of center, giving
a double coverage for a uniform application.
The application chart is based on 25 ft.
(7.62 m) driving intervals, not the actual spread
width. However, a slight change in driving
distance or spinner RPM may be beneficial for
optimum coverage.
1. Make sure all spread pattern adjustments are
complete, and a spread pattern test has been
produced following the “Spread Pattern Test”
instructions found on page “Spread Pattern Test” on
page 20.
2. From the Spread Pattern Test Results Sheet found
on page 22, determine the maximum (cc) volume
value of material in center of pattern.
3. Divide this value by two.
4. Locate the distance from the zero foot mark
(centerline of driving path) where the graph intersects
this (cc) value.
5. Multiply this distance by two to determine the
optimum driving interval.
Even if the pattern has an acceptable shape, optimum
driving interval may be too small for practical field
use. If this is the case, the spreader must be adjusted
to produce the best possible pattern shape with an
acceptable driving interval.
CAUTION:
Do not exceed the rated gross
weight of the spreader.