Great Plains 3N-4025P Operator Manual - Manual (Page 122)

118 3N-40P Table of Contents Index Great Plains Manufacturing, Inc.
196-538M Table of Contents Index 2014-01-29
Row Unit Shut Off
10HD and 25 Series row units are designed to permit
alternate row spacing, which requires disabling the rows
not used. This involves three steps:
1. Shut off seed flow to the row.
2. Lock up the row to reduce opener wear.
3. Disengage the meter drive to reduce meter wear.
20 Series rows do not have lock-up or meter disengage
capability, but seed flow may be shut off.
Seed Shut Off
Refer to Figure 169
To shut off seed flow to individual rows block the seed
flow to the row with an optional seed tube plug. See
page 163 for ordering.
25 Series Row Unit Lock-Up
15 in.splitter rows can be pinned in the up position to
accommodate 30 inch row spacing.
Refer to Figure 170
The lock-up pins
for each rear 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. Lock-up pins are not
standard on all row spacings. Refer to page 164 for
additional or replacement lock-up pins.
1. Raise the drill. Although this adjustment can be
made with the drill lowered, the springs will be in
tension, and will require more effort. The extra force
may also damage tools.
2. Install lift cylinder locks.
3. Set the down pressure springs be set to the
minimum setting, per the instructions on page 116.
4. Raise the row unit high enough that the hole for the
pin is above the lower parallel arm:
a. use a hoist at the rear of the shank
, or
b. use a jack under the shank extension
Refer to Figure 171
5.
Remove the pin from the storage hole and insert
and secure it in the lock-up hole .
6. Lower row unit. Parallel arm rests on lock-up pin.
Figure 169:
Seed Shut Off
26226
2 5
Loss of Control and Sharp Object Hazards:
Do not lift a row unit by hand. The weight of the unit, plus the
spring force (even at minimum) is too great (plus, a free hand
is needed for pinning). Even with multiple people lifting,
hand-lifting is unsafe - there are numerous sharp edges, and
Figure 170
25 Series Lock-Up Pin
25269
25193
3
4
6
2
3
4
5
6
Figure 171
25 Series Row Unit Locked Up
25270
4
3
3
4