Yetter 2991 User Manual
FRAME MOUNTED
SPRING LOADED
CONSERVATION
MODEL 2991 AND 2999
SET-UP & PARTS CATALOG
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
COULTER
YETTER MODEL 2991 and 2991
FRAME MOUNTED SPRING LOADED COULTER
BASIC COULTER BOX
2999-101 COULTER ASSEMBLY
2991-101 COULTER ASSEMBLY
CLAMPS
2990-154 CLAMP KIT 2-1/2 SQ. BAR
2990-155 CLAMP KIT 2 X 6 BAR
2990-156 CLAMP KIT 4 X 4 BAR
2990-157 CLAMP KIT 5 X 7 BAR
2990-158 CLAMP KIT 7 X 7 BAR
2990-159 CLAMP KIT 3” DIAMOND BAR
2990-160 CLAMP KIT 3-1/2” DIAMOND BAR
2990-161 CLAMP KIT 3 X 7 BAR
2990-162 CLAMP KIT 2-1/2 SQ. BAR, ½” SPACER
2990-163 CLAMP KIT 3” SQ. BAR
SHANKS
2990-310 SHANK 12-5/8”
2990-318 SHANK 16”
3010-303-SHANK 22”
2990-328 SHANK 26”
3011-302-SHANK 22” LONG, 5” OFFSET
2990-208 SHANK 12-5/8 LONG, 3” OFFSET
2990-342 SHANK 18”, ¾ OFFSET
WARRANTY POLICY
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 will 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.
Model Number:_________________________
Dealer :___________________
Yetter Manufacturing warrants its own products only and cannot be responsible for damage to
equipment on which mounted.
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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 machine must be services 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.
INSTALLATION
1. Assemble3/8 x 2-1/2” roll pin into hole at end of 1-1/2” dia. shank, leaving
approximately equal amount protruding out each side.
2. Insert lock collar into pivot and slide shank up through casting and lock collar. If you
wish to lock the coulter from pivoting, slide roll pin into slots in casting. If you wish to
let coulter pivot, do not align roll pin with casting slots, but slide shank up until roll pin
contacts casting surface. Install and tighten 5/8” setscrew in lock collar to 110 ft. lbs.
torque maximum.
3. Mount 17” coulter blade to hub using (4) ½ x 1-1/2” carriage bolts, lock washers and
hex nuts.
4. Assemble clamp components loosely to tool bar as shown in parts view of appropriate
clamp. The clamp setscrew must mount to the right, away from spring, as shown.
5. Position coulter clamps either toward the inside or outside of the planter openers on
each side of planter to equalize draft. Tighten (4) ½” bolts in clamps.
6. Install coulters on planter by inserting shank up through clamps and tightening 5/8 x
1” setscrews.
7. Install 5/16 x 2-1/2” cotter pins in all vertical 1-1/2” dia. shanks. The roll pin prevents
loss of coulter should the clamp setscrews work loose. Cotter pin can be installed
between clamp castings or on top, above top castings, depending on shank used.
8. Set coulter depth by loosening setscrews in clamp castings.
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