Great Plains 2525P Operator Manual - Manual (Page 37)

Great Plains Manufacturing, Inc. Adjustments 33
2013-05-10 118-231M
25 Series Row Unit Lock-Up
Alternate 25 Series twin-row units can be raised and
pinned to accommodate alternate row spacings. It is
generally easier to lock up the rear row unit of each pair.
Refer to Figure 35
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.
Note: Replacement pin part number is 805-033C
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. Set the down pressure springs be set to the mini-
mum setting, per the instructions on page 29.
3. 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
Crushing Hazard:
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
the row unit will snap down violently if a grip is lost.
Refer to Figure 36
4.
Remove the pin from the storage hole and insert
and secure it in the lock-up hole .
5. Lower row unit. Parallel arm rests on lock-up pin.
Refer to Figure 37
6.
Uncouple meter drives for the locked-up rows. Pull
shaft out and park pin in shallow detents.
7. Shut off seed tube port for the current row unit.
8. Repeat for all rows needing lock-up.
9. Reset seed monitor active row pattern and row spac-
ing to prevent nuisance alarms.
10. Reset marker extension (page 25).
11. Re-check row unit down-force on the active rows.
Certain Machine Damage:
Do not disable 25 Series meters by removing them or chain
drive damage will occur.
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 will
occur when planting begins.
1 4
Figure 35
25 Series Lock-Up Pin
25269
26219
2
3
5
1
2
3
Figure 36
25 Series Row Unit Locked Up
25270
3
4
5
Figure 37
Row Unit Drive Coupler
Engaged (Left) and
Disengaged (right)
26171
26172 2
3