Lock-up row – Great Plains 1625AHL Operator Manual User Manual
Page 88
84
1625AH
Great Plains Manufacturing, Inc.
411-020M
2014-04-21
Blank disks (part number 817-841C) are essential in row
shut-off, both to maintain consistent meter back-pressure
to meter pressurization and to prevent wear on seed
disks and minimize wear on brushes.
Blank disks are engineered to simulate a seed disk with
seed in all pockets. Blanks are particularly important on
the rows with sensor lines to the pressure chamber.
4. Lock-Up Row
Alternate twin-row units (the rear units) can be pinned in
the up position to accommodate single-row spacing.
Refer to Figure 88
The lock-up pins
are located in a storage hole
in
the row unit mount. To lock up a unit, the unit must be
raised, and the pin moved to the lock-up hole
in the
row unit shank.
Note: Lock-up pins are provided for every other row of
twin-row configurations. If you lose a pin, the
replacement part number is 805-435C
1.
Raise the planter. Although this adjustment can be
made with the planter lowered, the springs will be in
tension, and will require more effort. The extra force
may also damage tools.
2.
Install lift assist cylinder locks. Lower parking stands.
3.
Set the down pressure spring cam to zero, per the
instructions on page 72.
4.
Raise the row unit high enough that the hole for the
pin is above the lower parallel arm. This can be done
in several ways, including:
a. use a hoist at the rear of the shank
b. use a jack under the shank extension
Crushing Hazard:
Use a jack or hoist. Raising a row unit on a block by lowering
the planter is risky. The potential for hydraulic failure creates
a safety hazard. Full lowering can damage components.
Refer to Figure 89
5.
Remove the pin from the storage hole
and insert
and secure it in the lock-up hole
.
6.
Lower row unit until lock-up pin rests on lower
parallel arm.
Crushing and Sharp Object Hazards:
Do not attempt to lift a row unit by hand. The weight of the
unit, plus the force of the springs (even at minimum) is too
great (plus, a free hand is needed for pin insertion). Even with
multiple people lifting, hand-lifting is unsafe - there are
numerous sharp edges, and the row unit snaps down violently
if a grip is lost.
Figure 88
25AH Series Row Unit Lock-Up Pin
25269
36236
2
3
4
5
1
1
2
3
Certain Machine Damage:
Do not pin the row unit while it is in the lowered position.
If the pin is inserted below the parallel arm, unit damage
occurs as soon as planting begins.
Figure 89
25AP Series Row Unit Locked Up
29756
3
4
5
2
3