Great Plains YP825A3P Operator Manual User Manual

Page 52

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48

YP4-6-825A3P

Table of Contents

Index

Great Plains Manufacturing, Inc.

401-652M

Table of Contents

Index

2013-05-28

An adjuster cam

sets down pressure individually for

each row unit. This is useful for penetrating hard soil and
planting in tire tracks. For best results always adjust
tractor tires so they are not ahead of 30 inch rows.

Refer to Figure 43

Use only enough down pressure to cut the seed trench
and maintain proper soil-firming over seed. With a full
seed load, the force on each row is up to 120 pounds
higher at start of planting.

Excessive row unit spring force will lead to premature
wear on row unit components and uneven seed depth. If
all rows are set to cam 4, some lighter planter
configurations could be lifted out of ground contact.

Refer to Figure 42 (shown at cam setting 2),
Figure 43
and Figure 44

To adjust down pressure, use a 1

1

8

inch (29 mm) open

end wrench or the tool

stored at the left end of the

planter.

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 required may also damage tools.

2.

Install lift cylinder locks.

3.

Put tractor in Park and shut it off.

4.

Position wrench on the fixed nut

near or slightly

forward of vertical.

5.

Pull upper spring link

back.

6.

Move the adjustment cam

to the new setting on

the spring adjust bar

.

Note: Do not set all rows higher than notch four. Using

high settings across all rows causes uneven
planting. Individual rows may be set higher if
running in tire tracks. On twin-row configurations,
setting all rows to notch 4 or higher results in a net
up force that can exceed the weight of the planter
when the hoppers are nearing empty.

Figure 42

25AP Series Row Unit

Spring Adjustment

31034

3

5

2

2

Cam Notch

Pounds

Kilograms

zero (out of notch)

Lock-Up & Maintenance

one

305

140

two

330

150

three

365

165

four

425

195

five

485

220

six

545

250

tip

Do Not Use

Values are down force with hoppers empty

29958

Figure 43

Row Unit Minimum Cam (at 1)

27065

bottom

4

6

3

Figure 44

Row Unit Maximum Cam (at 6)

27065

top

4

5

2

6

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