Great Plains CALIBRATION CRANK User Manual
Great Plains Mfg., Inc.
Update Instructions
706/1006NT, 605NT, 3P605NT,
3P500/3P500V, 3P600
Calibration Crank Kit
Used with:
• 706 End Wheel No-Till
• 1006 End Wheel No-Till
• 605NT
• 3P605NT
• 3P500/3P500V
• 3P600
General Information
When you see this symbol, the subsequent instructions and
warnings are serious - follow without exception. Your life and
!
!
the lives of others depend on it!
These instructions explain how to install the calibration
crank kit. This kit uses a crank handle for calibration.
This allows for calibration in the field.
These instructions apply to:
152-300A 706/1006NT Calibration Kit
152-301A 605NT Calibration Kit
152-303A 3P605NT Calibration Kit
152-305A 3P600 Calibration Kit
152-306A 3P500/3P500V Calibration Kit
Manual Update
Refer to the 706/1006NT, 605NT, 3P605NT, 3P500/
3P500V, or 3P600 operator’s manual and seed rate
book for detailed information on safely operating, adjusting, troubleshooting and maintaining the calibration
crank. Refer to the parts manual for part identification. A
copy of the updated parts manual is available through
your Great Plains dealer.
150-285M 706/1006NT Operator’s Manual
150-285P 706/1006NT Parts Manual
151-061M 605NT/3P605NT Operator’s Manual
151-061P 605NT/3P605NT Parts Manual
118-794M 3P500/3P500V/3P600 Operator’s Manual
118-794P 3P500/3P500V/3P600 Parts Manual
Before You Start
Page 3 is a detailed listing of parts included in the Calibration Crank Kit update. Use this list to inventory parts
received.
Tools Required
• Basic Hand Tools
• Welder
• DA Grinder
706/1006NT 152-300A Assembly Instructions
Install Calibration Handle Stob
Refer to Figure 1
1. Choose a location on frame of drill to
weld the calibration handle stob.
NOTE: Be sure to choose an out of the way
location as the calibration handle stob
stores the calibration crank when it is not in
use.
2. Grind paint at location on frame where
calibration handle stob is to be welded.
3. Weld calibration handle stob on frame.
4. Repaint portion of frame.
© Copyright 2005 Printed
10/4/2005
23384
Figure 1
Calibration Crank on Storage Stob
152-302M
Calibration Crank Kit
2
Assemble Calibration Crank and
Coupler
Refer to Figure 2
1. Place black vinyl hand grip over calibration
crank handle.
2. Secure calibration crank to storage stob with
retaining pin.
3. Remove washer and roll pin from jackshaft.
Attach coupler to jackshaft and secure with
roll pin. Discard washer.
NOTE: Coupler should remain on jackshaft. Do
not remove coupler even after calibration.
Calibrate
Refer to Figure 3
1. Attach calibration crank to 706/1006NT
gauge wheel jackshaft. Disengage lockout on
the drive wheel. NOTE: If unit has native
grass an extra calibration coupler is needed
on the right hand gauge wheel. This can be
ordered thru your Great Plains Dealer.
Great Plains Mfg., Inc.
23385
Figure 2
Calibration Crank Assembly
2. Rotate calibration crank to see that feed cups
and drive are working properly and are free
from foreign matter.
3. To adjust seeding rate, decide which drive
type (gearbox) setting you need from the
seeding charts. Set the gear box. Rotate calibration crank a few turns to confirm gearbox
has been engaged.
4. Record weight of an empty container large
enough to hold seed metered for one acre.
5. Turn calibration crank several times to fill seed
cups with seed. Turn crank until seed falls to
the ground from each cup.
6. Rotate gauge wheel jackshaft using calibration crank about 595 rotations for the 706 and
411 rotations for the 1006. This is equal to
one acre.
7. Check that the three seed cups have plenty of
seed coming into them.
8. Weigh metered seed. Subtract intial weight of
container. Divide by three. Multiply by the
number of openers on your drill to determine
total pounds seeded per acre. If this figure is
different than desired, set your seed rate adjustment handle accordingly.
NOTE: You may want to repeat the calibration procedure if your results vary greatly from the seed
rate chart.
23386
Figure 3
Calibrate with Calibration Crank
Equations for calibrating seed rate:
measured seed - empty container
= pounds per seed cup
3 (number of seed cups measured)
pounds per seed cup x number of openers = pounds per acre
152-302M 10/4/2005
Great Plains Mfg., Inc.
605NT 152-301A Assembly Instructions
Install Calibration Handle Stob
Refer to Figure 1
1. Choose a location on frame of drill to weld
the calibration handle stob.
NOTE: Be sure to choose an out of the way location as the calibration handle stob stores the
calibration crank when it is not in use.
2. Grind paint at location on frame where calibration handle stob is to be welded.
3. Weld calibration handle stob on frame.
4. Repaint portion of frame.
Assemble Calibration Crank
1. Place vinyl hand grip over calibration crank
handle.
Replace Jackshaft
Refer to Figure 2
Installation Instructions
Figure 1
Calibration Crank on Storage Stob
3
23387
1. Loosen and remove 5/16-18 x 3/8 set
screws from lock collars on both sides of
left hand side gauge wheel drive assembly.
2. Remove lock collar from outside of left
hand side gauge wheel drive assembly.
3. Unclip and remove chain from chain
sprocket and jaw clutch located on inside
of left hand side gauge wheel drive assembly.
4. Remove jaw clutch and sprocket assembly
from gauge wheel jackshaft. Remove lock
collar.
5. Holding on to center sprocket, replace
gauge wheel jackshaft with new gauge
wheel jackshaft from kit.
6. Replace jaw clutch and sprocket assembly
on new jackshaft. Reattach chain to
sprocket. Add lock collars and tighten.
jaw clutch and sprocket
assembly
23388
Figure 2
Jackshaft
10/4/2005
152-302M
Calibration Crank Kit
4
Calibrate
Refer to Figure 2
1. To adjust seeding rate, decide which
drive type (gearbox) setting you need
from the seeding charts. Set the gear
box.
2. Record weight of an empty container
large enough to hold seed metered
for one acre.
3. Place several pounds of seed over
three seed cups on an outside end of
drill box. Pull seed tubes off of these
three openers.
4. Attach calibration crank to gauge
wheel jackshaft and secure with retaining pin. Disengage lockout on the
drive wheel. Rotate crank a few turns
to confirm clutch and gearbox are engaged.
Great Plains Mfg., Inc.
-
5. Rotate calibration crank to see that
feed cups and drive are working properly and are free from foreign matter.
6. Turn crank several times to fill seed
cups with seed. Rotate crank until
seed falls to the ground from each
cup.
7. Turn crank 935 rotations. This is equal
to one acre.
8. Check that the three seed cups have
plenty of seed coming into them.
9. Weigh metered seed. Subtract initial
weight of container. Divide by three.
Multiply by the number of openers on
your drill to determine total pounds
seeded per acre. If this figure is different than desired, set your seed rate
adjustment handle accordingly.
NOTE: You may want to repeat the calibration procedure if your results vary
greatly from seed rate chart.
23389
Figure 3
Calibrate
Equations for calibrating seed rate:
measured seed - empty container
= pounds per seed cup
3 (number of seed cups measured)
pounds per seed cup x number of openers = pounds per acre
152-302M 10/4/2005
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