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2910-130-HD
HEAVY DUTY COULTER
OPERATOR’S MANUAL
PART IDENTIFICATION
YETTER MANUFACTURING CO.
FOUNDED 1930
Colchester, IL 62326-0358
Toll free: 800/447-5777
309/776-3222 (Fax)
Website: www.yetterco.com
E-mail: info@yetterco.com
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FOREWORD
You’ve just joined an exclusive but rapidly
growing club.
For our part, we want to welcome you to the
group and thank you for buying a Yetter product.
We hope your new Yetter products will help you
achieve both goals-increase your productivity and
increase your efficiency so that you may generate
more profit.
This operator’s manual has been designed into
four major sections: Foreword, Safety
Precautions, Installation Instructions and Parts
Breakdown.
This SAFETY ALERT SYMBOL
indicates important safety messages in
the manual. When you see this
symbol, be alert to the possibility of
PERSONAL INJURY and carefully
read the message that follows.
The word NOTE is used to convey information
that is out of context with the manual text. It
contains special information such as
specifications, techniques and reference
information of a supplementary nature.
The word IMPORTANT is used in the text when
immediate damage will occur to the machine due
to improper technique or operation. Important will
apply to the same information as specified by
note only of an immediate and urgent nature.
It is the responsibility of the user to read the
operator’s manual and comply with the safe and
correct operating procedure and to lubricate and
maintain the product according to the
maintenance schedule in the operator’s manual.
The user is responsible for inspecting his
machine and for having parts repaired or
replaced when continued use of the product
would cause damage or excessive wear to the
other parts.
It is the user’s responsibility to deliver his
machine to the Yetter dealer who sold him the
product for service or replacement of defective
parts, which are covered by the warranty policy.
If you are unable to understand or follow the
instructions provided in this publication, consult
your local Yetter dealer or contact:
YETTER MANUFACTURING CO.
309/776-4111
800/447-5777
309/776-3222 (FAX)
Website: www.yetterco.com
E-mail: info@yetterco.com
WARRANTY
Yetter Manufacturing warrants all products manufactured and sold by it against defects in material. This
warranty being expressly limited to replacement at the factory of such parts or products as shall appear to
be defective after inspection. This warranty does not obligate the Company to bear cost of labor in
replacement of parts. It is the policy of the Company to make improvements without incurring obligations to
add them to any unit already sold. No warranty is made or authorized to be made, other than herein set
forth. This warranty is in effect for one year after purchase.
DEALER: ________________________________________
Yetter Manufacturing warrants its own products only and cannot be responsible for damages to
equipment on which mounted.
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SAFETY
A brief description of signal words that may be used in this manual:
CAUTION: Used as a general reminder of good safety practices or to direct attention to unsafe practices.
WARNING: Denotes a specific potential hazard.
DANGER: Denotes the most serious specific potential hazard.
SAFETY PRECAUTIONS
You can make your farm a safer place to live and work if you observe the safety precautions given. Study
these precautions carefully and insist that those working with you and for you follow them.
Finally, remember this: an accident is usually caused by someone’s carelessness, neglect or oversight.
WARNING
Never clean, lubricate or adjust a machine that is in motion. Always lower or block the implement before
performing service.
If the machine must be serviced in the raised position, jack or block it up to prevent it from accidentally
falling and injuring someone.
Do not allow riders on the tractor or implement.
Use speeds and caution dictated by the terrain being traversed. Do not operate on any slope steep enough
to cause tipping or loss of control.
Be sure all personnel are clear of the immediate area before operating.
Read and understand the operator’s manual and require all other persons who will operate the equipment
to do the same.
Be familiar with all tractor and implement controls and be prepared to stop engine and implements quickly in
an emergency.
CAUTION
Consult your implement and tractor operator’s manual for correct and safe operating practices.
Beware of towed implement width and allow safe clearance.
FAILURE TO HEED MAY RESULT IN PERSONAL INJURY OR DEATH.
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BOLT TORQUE
Mounting bolts and hardware
Before operating the 2910-130-HD Coulter for the first time, check to be sure that all
hardware is tight. Check all hardware again after approximately 50 hours of operation
and at the beginning of each planting season.
All hardware used on the 2910-130-HD Coulter is Grade 5 unless otherwise noted.
Grade 5 cap screws are marked with three radial lines on the head. If hardware must be
replaced, be sure to replace it with hardware of equal size, strength and thread type.
Refer to the torque values chart when tightening hardware.
Important: Over tightening hardware can cause as much damage as when
under tightening. Tightening hardware beyond the recommended range can
reduce its shock load capacity.
The chart below is a guide for proper torque. Use it unless a specified torque is called out
elsewhere in the manual.
Torque is the force you apply to the wrench handle or the cheater bar, times the length of the
handle or bar.
Use a torque wrench whenever possible.
The following table shows torque in ft. lbs. for coarse thread hardware.
Lubricate all bearings and moving parts as assembled and make certain that they work freely.
WARNING: Never work around the toolbar/implement while in a raised position without using
safety lockups.
CAUTION: The coulter disc attachments are very heavy. Pay extra attention to lifting techniques
while handling and or maneuvering the opener during assembly. Failure to do so may lead to
personal injury.
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2910-130-HD
INSTALLATION
1. Assembly 3/8 x 2-1/2” roll pin into hole closest to end of 1-1/2” diameter shank, leaving
approximately equal amount protruding out each side. Note: offset shanks require
that you perform step 2 first then step 1.
2. Insert lock collar into pivot casting and slide shank up through casting and lock collar.
Slide shank up till roll pin contacts casting surface. Install and tighten 5/8 x 1”
setscrew in lock collar to 110 ft. lb. torque maximum.
3. Mount blade to hub using four 1/2 x 1-1/2” carriage bolts, lock washers and nuts.
4. Assemble clamp components loosely to the tool bar as shown in parts view of
appropriate clamp. Tighten four 1/2” nuts to secure the clamps.
5. Slide shank up through clamps and tighten 5/8 x 1” setscrews.
6. Install 5/16 x 2-1/2” cotter pins in all vertical 1-1/2” diameter shanks. This cotter pin
prevents loss of coulter should the clamp setscrews work loose. Cotter pin can be
installed between clamp castings or on top, above top casting depending on the
shank.
7. Set lock collar to allow swivel in one or both directions as required. Tighten set screw
to 110 ft. lb. torque maximum.
8. Set spring tension by adjusting 3/4” lock nut until 1/8” of threads are exposed above
the nut. Tighten 3/4” locknut if greater spring pre-load is required.
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OPERATION
1. Set/mount coulter blades to run perpendicular to the soil. Operation depth and blade
wear can be affected if the coulter is mounted crooked or if the toolbar is not level side to
side.
2. After a few hours of use, check all bolts for tightness and proper torque.
3. After a day of use (10-12 hours) check coulter hubs for loose bearings. There should be
no endplay in the hub bearings allowing the blade to wobble. If necessary, remove
hubcap and cotter pin and adjust the slotted nut to remove wobble, recommended torque
of 15 ft. lbs. and re-insert cotter pin. If the wobble or looseness cannot be corrected, the
bearings, cups and seals will need to be replaced.
DO NOT USE WORN OR DAMAGED PARTS.
MAINTENANCE
LUBRICATION: USE #2 MULTI-PURPOSE BEARING GREASE
To ensure longevity and reliability of the U.N.T. Coulter, the recommended lubrication
schedule should be followed using multi-purpose grease at hourly intervals as indicated.
BEARING ADJUSTMENT:
1. Raise the toolbar until the blade is clear of the ground. Place a safety stand under the toolbar.
Remove the hubcap, cotter pin, slotted nut and washer from the hub assembly. Remove the blade
from the hub assembly.
2. Remove bearing cones and seals from hub.
3. Wash the old grease from the hub, bearing cups, spindle spacers, seals and bearing cones.
Inspect the condition of the bearing cups, cones and seals. Replace if necessary.
4. Apply #2 multi-purpose lithium grease on each bearing. Make sure the space around each roller is
filled. Lubricate the bearing cups.
5. Position the bearing in the cup and install the seal. Lubricate the seal lips and proceed with re-
assembly of the removed parts including the blade. Blade bolt torque is 90 to 96 ft. lbs.
6. Tighten the slotted nut to 15 ft. lbs. or until a definite drag is felt when the blade is turned by hand.
Tighten the nut one slot position to line up the cotter pin hole with a slot. Secure the nut with a new
cotter pin, replace hubcap.
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PARTS IDENTIFICATION
BLADE OPTIONS
PART NO. DESCRIPTION PART NO. DESCRIPTION
2571-164 14-5/8" Wave Blade (8 Wave) 2571-156 18" Wavy Blade (8 Wave)
2571-167 14-4/8" 25 Multi-Wave Blade 2571-155 18" 13 Wave Blade
2571-154 16" Bubble Flute Blade 2571-179 18" Multi-Wave Blade (25 Wave)
2571-163 16" Ripple Blade 2571-169 18" Smooth Blade
2571-156 16" Wavy Blade (8 Wave) 2571-076 20" Ripple Blade
2571-164 16" 13 Wave Blade 2571-178 20" Smooth Blade
2571-172 16" Multi-Wave Blade (25 Wave) 2571-198 20" Notched Blade
2571-206 16" Smooth Blade 2571-201 20" Notched Bubble Blade
2571-158 17" Ripple Blade 2571-203 20" Multi-Wave Blade (25 Wave)
2571-165 17" Notched Smooth Blade
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PARTS IDENTIFICATION
2990-159 Clamp Kit, 3” Diamond Bar
Key Qty. Part No. Description
1 4 2502-369 1/2-13 x 8” HHCS Gr. 5 ZP
2 2 2990-314 Clamp Plate, 4” Sq. or 3” Diamond
3 2 2970-326 Adaptor, 3” Sq. Diamond Bar
4 2 2990-360 Clamp Casting, Drilled
5 2 2503-379 5/8-11 x 1” Sq. HCPSS Gr. 5 ZP
6 4 2520-357 1/2-13 Lock Hex Nut ZP
Key Qty. Part No. Description
1 4 2502-374 1/2-13 x 9” HHCS Gr. 5 ZP
2 2 2990-316 Clamp Plate, 3-1/2” Diamond Bar
3 2 2970-327 Adaptor, 3-1/2” Sq. Diamond Bar
4 2 2990-360 Clamp Casting, Drilled
5 2 2503-379 5/8-11 x 1” Sq. HCPSS Gr. 5 ZP
6 4 2520-357 1/2-13 Lock Hex Nut ZP
Key Qty. Part No. Description
1 4 2502-371 1/2-13 x 7” HHCS Gr. 5 ZP
2 2 2990-348 Clamp Plate, 2-1/4, 2-1/2 Diamond Bar
3 2 2990-349 Adaptor, 2-1/4, 2-1/2 Diamond Bar
4 2 2990-360 Clamp Casting, Drilled
5 2 2503-379 5/8-11 x 1” Sq. HCPSS Gr. 5 ZP
2990-160 Clamp Kit, 3-1/2” Diamond Bar
2990-166 Clamp Kit, 2-1/4,2-1/2 Diamond Bar
6 4 2520-357 1/2-13 Lock Hex Nut ZP
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PARTS IDENTIFICATION
2990-154 Clamp Kit, 2-1/2” Sq. Bar 2990-155 Clamp Kit, 2 x 6 Bar
Key Qty. Part No. Description Key Qty. Part No. Description
1 4 2502-368 1/2-13 x 5-1/2” HHCS GR. 5 ZP 1 4 2502-362 1/2-13 X 5” HHCS GR. 5 ZP
2 2 2990-313 Clamp Plate, 2-1/2 Square Bar 2 2 2975-363 Clamp Plate, Universal
3 2 2990-360 Clamp Casting, Drilled 3 2 2990-360 Clamp Casting, Drilled
4 2 2503-379 5/8-11 x 1 Sq. HCPSS Gr. 5 ZP 4 2 2503-379 5/8-11 x 1 Sq. HCPSS Gr. 5 ZP
5 4 2520-357 1/2-13 Hex Lock Nut ZP 5 4 2520-357 1/2-13 Hex Lock Nut ZP
2990-156 Clamp Kit, 4 x 4 Bar 2990-157 Clamp Kit, 5 x 7 Bar
Key Qty. Part No. Description Key Qty. Part No. Description
1 4 2502-371 1/2-13 x 7” HHCS GR. 5 ZP 1 4 2502-369 1/2-13 X 8” HHCS GR. 5 ZP
2 2 2990-314 Clamp Plate, 4” Sq. & 3” Diamond Bar 2 2 2990-315 Clamp Plate, 5 x 7 or 7x 7 Bar
3 2 2990-360 Clamp Casting, Drilled 3 2 2990-360 Clamp Casting, Drilled
4 2 2503-379 5/8-11 x 1 Sq. HCPSS Gr. 5 ZP 4 2 2503-379 5/8-11 x 1 Sq. HCPSS Gr. 5 ZP
5 4 2520-357 1/2-13 Hex Lock Nut ZP 5 4 2520-357 1/2-13 Hex Lock Nut ZP
2990-158 Clamp Kit, 7 x 7 Bar 2990-161 Clamp Kit, 3 x 7 Bar
Key Qty. Part No. Description Key Qty. Part No. Description
1 4 2502-376 1/2-13 x 10” HHCS GR. 5 ZP 1 4 2502-373 1/2-13 X 6” HHCS GR. 5 ZP
2 2 2990-315 Clamp Plate, 5 x 7 or 7 x 7 Bar 2 2 2990-315 Clamp Plate, 5 x 7 or 7 x 7 Bar
3 2 2990-360 Clamp Casting, Drilled 3 2 2990-360 Clamp Casting, Drilled
4 2 2503-379 5/8-11 x 1 Sq. HCPSS Gr. 5 ZP 4 2 2503-379 5/8-11 x 1 Sq. HCPSS Gr. 5 ZP
5 4 2520-357 1/2-13 Hex Lock Nut ZP 5 4 2520-357 1/2-13 Hex Lock Nut ZP
2990-163 Clamp Kit, 3 x 3 Bar 2990-171 Clamp Kit, 3 x 4 Bar
Key Qty. Part No. Description Key Qty. Part No. Description
1 4 2502-373 1/2-13 x 6” HHCS GR. 5 ZP 1 4 2502-373 1/2-13 X 6” HHCS GR. 5 ZP
2 2 2990-339 Clamp Plate, 3” Square Bar 2 2 2990-314 Clamp Plate, 4” Sq. & 3” Dmd
3 2 2990-360 Clamp Casting, Drilled 3 2 2990-360 Clamp Casting, Drilled
4 2 2503-379 5/8-11 x 1 Sq. HCPSS Gr. 5 ZP 4 2 2503-379 5/8-11 x 1 Sq. HCPSS Gr. 5 ZP
5 4 2520-357 1/2-13 Hex Lock Nut ZP 5 4 2520-357 1/2-13 Hex Lock Nut ZP
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PARTS IDENTIFICATION
2975-151 Clamp Kit, 3 x 6 Bar 2990-172 Clamp Kit, 4 x 6 Bar
Key Qty. Part No. Description Key Qty. Part No. Description
1 4 2502-373 1/2-13 x 6” HHCS GR. 5 ZP 1 4 2502-371 1/2-13 X 7” HHCS GR. 5 Zp
2 2 2975-363 Clamp Plate, Universal 2 2 2975-363 Clamp Plate, Universal
3 2 2990-360 Clamp Casting, Drilled 3 2 2990-360 Clamp Casting, Drilled
4 2 2503-379 5/8-11 x 1 Sq. HCPSS Gr. 5 ZP 4 2 2503-379 5/8-11 x 1 Sq. HCPSS Gr. 5 ZP
5 4 2520-357 1/2-13 Hex Lock Nut ZP 5 4 2520-357 1/2-13 Hex Lock Nut ZP
2990-173 Clamp Kit, 6 x 4 Bar 2990-174 Clamp Kit, 7 x 5 Bar
Key Qty. Part No. Description Key Qty. Part No. Description
1 4 2502-374 1/2-13 x 9” HHCS GR. 5 ZP 1 4 2502-376 1/2-13 X 10” HHCS GR. 5 ZP
2 2 2990-314 Clamp Plate, 4” Sq. & 3” Diamond Bar 2 2 2975-367 Clamp Plate, 5 Sq. Bar
3 2 2990-360 Clamp Casting, Drilled 3 2 2990-360 Clamp Casting, Drilled
4 2 2503-379 5/8-11 x 1 Sq. HCPSS Gr. 5 ZP 4 2 2503-379 5/8-11 x 1 Sq. HCPSS Gr. 5 ZP
5 4 2520-357 1/2-13 Hex Lock Nut ZP 5 4 2520-357 1/2-13 Hex Lock Nut ZP
2990-175 Clamp Kit, 7 x 4 Bar 2990-182 Clamp Kit, 4 x 7 Bar
Key Qty. Part No. Description Key Qty. Part No. Description
1 4 2502-376 1/2-13 x 10” HHCS GR. 5 ZP 1 4 2502-371 1/2-13 X 7” HHCS GR. 5 ZP
2 2 2990-314 Clamp Plate, 4” Sq. 3” Diamond Bar 2 2 2990-315 Clamp Plate, 5 x 7 or 7 x 7 Bar
3 2 2990-360 Clamp Casting, Drilled 3 2 2990-360 Clamp Casting, Drilled
4 2 2503-379 5/8-11 x 1 Sq. HCPSS Gr. 5 ZP 4 2 2503-379 5/8-11 x 1 Sq. HCPSS Gr. 5 ZP
5 4 2520-357 1/2-13 Hex Lock Nut ZP 5 4 2520-357 1/2-13 Hex Lock Nut ZP
6300-105 Clamp Kit, 5 x 5 Bar
Key Qty. Part No. Description
1 4 2502-369 1/2-13 x 8” HHCS GR. 5 ZP
2 2 2975-367 Clamp Plate, 5” Square Bar
3 2 2990-360 Clamp Casting, Drilled
4 2 2503-379 5/8-11 x 1 Sq. HCPSS Gr. 5 ZP
5 4 2520-357 1/2-13 Hex Lock Nut ZP
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Our name
Is getting known
Just a few years ago, Yetter products were sold primarily to the
Midwest only. Then we embarked on a program of expansion and
moved into the East, the South, the West and now north into Canada.
We’re even getting orders from as far away as Australia and Africa.
So, when you buy Yetter products . . .you’re buying a name that’s
recognized. A name that’s known and respected. A name that’s
become a part of American agriculture and has become synonymous
with quality and satisfaction in the field of conservation tillage.
Thank you.
YETTER MANUFACTURING CO.
Colchester, IL 62326-0358 • 309/776-4111
Toll Free 800/447-5777
Fax 309/776-3222
Website: WWW.YETTERCO.COM
E-MAIL: INFO@YETTERCO.COM
2565-743 • 09/08
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