GREAT PLAINS LC25 Guide

FIELDADJUSTMENTGUIDE

Document #TLUS850C-0001A

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Document # TLUS850C-0001A

Tillage

Lister Cultivator

Proper servicing and adjustment is key to the long life of all farm equipment. With careful and systematic

inspection of equipment, costly maintenance, time and repair can be avoided. The following information

will assist with recommended servicing and adjustments:

48688

Models Affected:LC25, LC40

Date: August 4, 2015

General Information

Document #TLUS850C-0001A 2 of 5

Row Unit Down Pressure (Springs):

Increase individual row spring down pressure for rows

that run in tire tracks.

The following table provides the down-force values with

the tool bar and parallel arms level with the ground:

Down Force Bolt Reveal

Pounds kg Inches mm

350 160 3.20a 89

390 175 3.25 83

450 205 3.00 76

490 220 2.75 70

540 245 2.50 64

To Adjust Spring Pressure:

1) Measure the current bolt reveal (1) from the top of the

cast spring plug to the bottom of the bolt head (top of

washer) on each spring.

2) Loosen the jam nut (2) at the cast plug.

3) Turn the bolt head (3) to obtain the new reveal value.

Make the same adjustment to both springs.

48689

Coulter Adjustment:

1) Raise the implement high enough to take pressure off

of the coulter. Adjustments can be made with the coulters

on the ground but requires more effort.

2) Remove the hairpin (4) and release the crank handle

from storage.

3) Note the current setting on the scale at the row being

adjusted. Each 1/2 number graduation represents

approximately 1” (2.5 cm) of vertical coulter movement.

4) Remove the hair pin (5) from the adjustment shaft.

5) Place the crank on the threaded rod (6) and rotate the

crank until the desired scale value appears at the top of

the pivot plate (7).

6) Adjust the crank to re-align the pin hole in the thread

rod with the slot in the scale.

7) Once adjusted, repeat steps for all rows.

48670

48691

Document #TLUS850C-0001A

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Coulter Scraper Adjustment:

This adjustment needs to be made as scrapers wear or

when the scrapers are replaced. At each row, check the

gaps (8) between the lower edges of the scrapers and

the coulter depth band. The factory setting is 3/32” (0.9

inch, 2.4 mm).

To adjust the scraper:

1) Loosen the nuts (9) at the slots.

2) Slide the scraper down until the correct gap is

achieved. Keep the scraper centered on the coulter

blade and tighten the nuts.

Note: If the scraper reaches the end of its slots, and the

gap (8) is larger than 3/32” (2.4 mm), the scraper is worn

out and must be replaced.

48693

Barring-Off Adjustments (Option):

Sliding tubes and bent pins provide a choice of widths

(measured at the disc bottom edges), ranging from 11.3”

(28.7 cm) to 31.3” (79.5 cm). By alternating tube and

sleeve holes, the total width may be adjusted in incre-

ments of 5/8” (16 mm).

To adjust:

1) Raise the implement slightly.

2) Remove the hairpin (10) and each bent pin (11).

3) Slide the disc mounting tubes in or out depending on

the desired width.

4) Secure the disc mount with the bent pin and hairpin.

Note: If a cap is present, do not mount a barring-off tube

in that receiver. In that current row spacing, a barring-off

disc installed in this tube would strike other implement

parts during fold.

48694

10 11

48695

Lister Shovel Adjustments:

Great Plains recommends operating with the lister

shovel fully raised unless conditions dictate otherwise.

To adjust the shovel height:

1) Loosen the nuts (12) on the lower shear bolts and the

lock nut (13) on the top pivot bolt.

2) Slide the mounting bar (14) up or down and re-tighten

the nuts.

48692

Document #TLUS850C-0001A 4 of 5

Note: If a lower shear bolt ever fails during operation,

replace it with an identical (#802-720C). Do not use a

high grade bolt, or equipment damage may result.

3) Tighten all three nuts to Grade 5 torque specification

(50 foot-pounds).

4) Ensure that all rows have identical adjustments. The

only time they may differ is for rows in tire tracks.

Furrower Disc Angle Adjustment:

This setting needs to be adjusted per the furrow profile

and conditions. The other furrower adjustments are

often satisfactory at their factory setting.

1) Loosen the eight nuts (15) on the slotted bolts and

pivot bolts. Ensure that both top and bottom bolts are all

loose.

2) Set the disc angle to the desired setting and re-tighten

the nuts.

48696

Furrower Disc Height Adjustment:

If it is necessary to change the furrower height, first see

if the channel/mount adjustment suffices.

1) Loosen both nuts (16) on one disc side and slide the

mount up or down on the channel. Re-tighten the nuts

when adjusted.

48748

Cultivator Height Adjustment:

1) Loosen the nuts (17) at the lower shear bolts, and the

lock nut (18) at the upper pivot bolt.

2) Slide the shank (19) up or down to the desired height.

The factory setting is 10 1/2 inches, measured from the

bottom of the row unit frame to the top of the sweep

shank weldment.

3) Tighten the lower nuts and upper lock nut to 50 foot-

pounds. Note: If the lower shear bolt is ever failed by a

field obstruction, replace it with an identical (802-720C)

HHCS 7/16-14x3 1/2 GR5 PLT. Do not use a higher

grade bolt, or equipment damage may result. Using a

lower grade bolt may result in nuisance shears.

48747

Cultivator Pitch Angle:

The upper cultivator mounting bolt (20) passes through

a slot in the shank, allowing some pitch angle adjust-

ment. The factory setting is maximum nose up.

1) Loosen both the upper (20) and lower (21) nuts.

Adjust the pitch angle and secure both nuts.

48747

Document #TLUS850C-0001A

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Cultivator Deflector Height and Angle:

1) To adjust the angle, loosen the nuts (22) at the curved

slots and move the deflector shields (23) to the desired

angle. Re-tighten the nuts.

2) To adjust the height, loosen the nuts (24) at the mount

and slide the mount (25) up or down. Re-tighten the nuts

when the desired height is achieved.

Note: To obtain further lowering, the shield mount (25) can

be inverted to gain more distance.

48749

24 25

Shield Adjustment:

Inward/Outward Adjustments:

1) For different row spacings, loosen the two bolts (26) that

clamp the tubes to adjust the shield inward/outward.

48750

Forward/Rear Adjustments:

1) To move the shields forward or backwards, loosen the U-

bolts (27) on the clamp bar (28) and slide the shield to the

desired adjustment.

48751

27 28

Vertical Adjustments:

1) To adjust the shields vertically, there are three holes (29)

approximately 3 inches apart.

48750

Height Adjustments:

1) The chain (30) length can be adjust for fine tuning height.

48752

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