Great Plains 80403P Operator Manual - Manual (Page 12)

8-Row 36", 38", 40" & 10-Row 30" 3-Point Wide Row Planter 401-020M 8/1/01 10 Great Plains Mfg., Inc.
Section 3 Row Unit Operation
If the alignment is correct the coupler will engage with
the shaft freely and the roll pin will extend equally on
each side of the coupler. Disengage the clutch and
check the horizontal alignment.
Check for Horizontal Alignment (Refer to Figure 3-7):
1. Latch the appropriate hopper into place on the hop-
per support.
2. The roll pin in the end of meter input shaft should be
centered (equal distances of the roll pin should pro-
trude from both sides of the shaft).
3. Rotate the input shaft so that the roll pin is horizon-
tal.
4. Rotate the drive coupler so that the slots are hori-
zontal.
5. Release the clutch to engage the drive coupler with
the input shaft.
To adjust alignment:
•
With the hopper in place loosen the two 5/16" nuts.
•
Engage the clutch to the meter input shaft.
•
Align clutch with shaft and tighten 5/16" nuts to torque
Vertical Alignment
Figure 3-6
12417
values in the Specifications section.
Down Force Row
Standard Spring Package
The standard down force spring package, consists of 2
non-adjustable springs applying approximately
90 lbs. of down force.
Optional Medium and Heavy Duty Spring Package
The medium and heavy duty spring packages consist of
2 or 4 adjustable springs, respectively. The medium duty
package can be adjusted from approximately 100 to 200
lbs. down force. The heavy duty package can be adjust-
ed from approximately 200 to 400 lbs. of down force.
Spring Adjustments
•
All spring adjustments must be made with the planter
in the fully raised position.
•
The spring package is adjustable from 90 lbs. to 325
lbs. of down force when the parallel arms are horizon-
tal. Consult the Down Force Pressure Chart on
page 11 to obtain the desired down force.
•
Two springs can be purchased at your Great Plains
Dealer to make the medium duty package into a heavy
duty package or two springs can be removed from the
heavy duty package to make a medium duty package.
Add or subtract springs by removing the cotter key at
the end of the spring pivot rod. Slide the rod inward to
add or remove a spring from each side. Then attach or
remove the other spring end on the hex bar support.
NOTE: The maximum down force stated before is
reached when the parallel arms are all the way up.
NOTE: To adjust the spring tension, lift the plunger by
pulling up on the roll pin handle and sliding the handle
adjustment assembly into the appropriate hole, see
Figure 3-8.
Horizontal Alignment
Figure 3-7
12396