Great Plains 1005NT Assembly Instructions - Manual (Page 20)

18 7ft and 10ft EWNT Small Seeds Great Plains Manufacturing, Inc.
123-535M 06/02/2008
Small Seeds Rate Calibration
Differences will exist between the tested seed and field
conditions used to generate the Small Seeds Rate
Charts, and your seed and conditions. To accurately
achieve your target population, Great Plains recom-
mends calibrating.
Perform the calibration with the drill lowered to planting
position (if the openers are raised, the clutch disen-
gages). Leave the tractor hitched for movement control.
Block the tires not being used in the calibration.
1. Jack up the left drive gauge wheel. Use blocks to
ensure that the drill cannot fall if the jack relaxes, tips
over or fails.
2. Rotate the gauge wheels and check that the drives
and seed cups are engaged, working properly and
free from foreign material. If not already done, set
the Small Seeds Rate Handle. If fertilizer is loaded,
remove the fertilizer drive chain (unless you are
simultaneously calibrating fertilizer rate).
3. Check that your gauge-wheel tires are the correct
size for the drill and properly inflated. See “Tire Infla-
tion Chart” in Operator Manual.
4. Record the weight of one to three empty containers
collectively large enough to hold seed metered.
5. Place several pounds of seed over three seed cups
on the outside end of the drill box. Pull lower end
seed hoses off of these drops at the opener end.
6. Turn gauge wheel several times to fill seed cups.
Turn until seed drops to ground from each hose.
7. Place empty container(s) under the three hoses to
gather metered seed.
8. Turn gauge wheel until one acre is tallied on acreme-
ter (see Operator Manual for your drill). While turn-
ing, check that cups have ample seed coming into
them.
9. Weigh metered seed. Subtract initial weight of con-
tainer(s).
!
WARNING
You may be severely injured or killed by being crushed from a
falling implement or openers. Always have transport locks in
place and frame sufficiently blocked up when working on the
drill.
For example: 1005NT-1575 drill
using a row spacing of:
7.5in
row count:
15
you desire to plant alfalfa at:
10 pounds per acre;
this corresponds to an initial Seed Rate Handle of:
50
For example:
three 5.7oz (0.356 pound) containers weigh:
1.07 lbs
For example:
the three containers weighed a total 3.17 lbs after test:
2.1 lbs net
NetWeight GrossWeight ContainerWeights – =
2.1 3.17 1.07 – =