Earthway Spreader-Calibration - Manual

Using the EV-N-SPRED
®
Dual Port PRO Adjustable
Shut-Off System
The EV-N-SPRED® Dual Port PRO Adjustable Shut-Off System is included on all
EarthWay® professional models and allows the operator to balance the spread
pattern evenly across the full 180 o spread width, regardless of the weight
or size of granular material. By closing either the right and or left
side throwing ports you can balance the spread pattern to exacting
precision without compromising spread width or application rate.
Each EV-N-SPRED® Dual Port PRO Adjustable Shut-Off System
drop hole has a corresponding 1/3 rd coverage area on the spread
width of the spreader leaving a feathered-edge for overlapping the
spread path. The illustration to the right shows each port and the
corresponding 1/3 rd coverage area of the spread path. These ports
can be adjusted to effectively balance the spread pattern, giving
equal amounts of material across the full 180 o spread pattern.
EV-N-SPRED® Dual Port PRO System Setup
Test all material prior to beginning your spreading job. You will need a 50’
measuring tape, a small scale to weigh the material, bucket or container to hold
the material for re-weighing, chalk or a line marking device, and (7) low baking tins.
Using the EarthWay® Bag Calibrator #77016 can greatly reduce the time needed for
determining the Setting Rates on any material but is not
mandatory to establish a setting rate.
1. Evaluate the material being spread by comparing it to
the following standard as a reference.
Large/Heavy is the size of a BB (⅛ in / 3mm), spread width is 9 - 12 feet (2.8 - 3.7 meters
Medium/Mixed (½ the size of a BB), spread width is 7 - 9 feet (2.1 - 2.8 meters)
Small/Fine (the size of sand), spread width is 5 - 7 feet (1.5 - 2.1 meters)
2. Add a small amount of the material into the spreader, enough to cover the bottom
(2 - 3 in / 5 - 7 cm) and begin to test for spread width.
Set the stop on the gauge to #15 and push the spreader several feet /meters at
normal walking speed on a flat hard surface (where the material will be visible), and
OPEN the lever to the STOP while continuing to walk for 3-4 paces, and CLOSE the
shut-off and STOP (don’t move the spreader from that position). Measure the spread
width and evaluate the spread pattern for even distribution on either side of the
spread width center line.
TIP: Typical spread width references are listed above. The
spread width that you measure is used to calculate the actual Setting Rate for the
material.
Sp
rea
d Patte
rn
Adjustable Throwing Ports
with 8 repeatable settings
to balance the left or right
spread pattern to
the center.
EV-N-SPRED EV-N-SPRED
EarthWay EarthWay
R R
Sp
rea
d Patte
rn
SPREAD WIDTH
Gauge & Lever
15 FINE MEDIUM LARGE