Lock-up row – Great Plains 2525A Operator Manual User Manual
Page 55
Great Plains Manufacturing, Inc.
Adjustments
51
2013-06-04
118-999M
5. 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 55
The lock-up pins
for each front row unit 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.
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.
Note: If you lose a pin, the replacement part number is
805-033C
1.
Raise the drill. Although this adjustment can be
made with the drill lowered, the springs will be in ten-
sion, 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 39.
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 drill is risky. The potential for hydraulic failure creates a
safety hazard. Full lowering can damage components.
Refer to Figure 56
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 paral-
lel arm.
Figure 55
25AP Row Unit Lock-Up Pin
25269
29600
1
2
3
4
5
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 56
25AP Row Unit Locked Up
29756
3
4
5
2
3