Unit-mounted coulter adjustments – Great Plains YP1625A Operator Manual User Manual

Page 68

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64

YP1125A & YP1625A

Table of Contents

Index

Great Plains Manufacturing, Inc.

401-625M

Table of Contents

Index

2013-08-13

Unit-Mounted Coulter Adjustments

The ideal operating depth for coulters is

1

4

inch (6 mm)

above opener depth. Although they may have originally
been set to this depth, coulter (and opener) blades wear
with time, and may need adjusting.

Adjusting the coulter depth is accomplished by
re-mounting the coulter blade in one of the six mounting
holes arranged in a staggered pattern in the coulter
bracket.

Refer to Figure 77 and Figure 78
Raise planter and install cylinder locks before working on
coulters. Row unit may be fully lowered or locked up. Do
not attempt to move blade when the current or new
position causes it to contact the ground during
adjustment. Be careful around the front end of row units.
Row clear tines and coulter blades may be sharp.

To adjust coulter depth:

1.

Dismount row cleaner (if present) to reduce risk of
injury.

2.

Determine the present opener and coulter depths.

3.

Note which bracket hole the coulter is presently
using.

4.

Determine which new hole will position the coulter
closer to the

1

4

inch-above depth. See the table

below. If none, don’t move it.

5.

Remove the

5

8

-11

×4in bolt, lock washer and

nut (

in Figure 77).

6.

Move the blade to the new position. Insert the bolt,
and tighten on the lock washer and nut.

7.

Re-adjust openers, if installed.

If a worn coulter cannot be adjusted to satisfactory
operating depth, replace coulter blade.

Hole

Number

Depth of (new) coulter blade

relative to (new) opener blades

1 inch (25 mm) above

5

8

inch (16 mm) above

1

4

inch (6 mm) above

0

3

8

inch (9.5 mm) below

3

4

inch (19 mm) below

Figure 77

25 Series Unit-Mounted Coulter

29124

7

Figure 78

Coulter Blade Mounting Holes

23288

1

4

6

2

3

5

7

2

3

5

1

4

6

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