Yetter 2987 User Manual
2987 NH3 MAGNUM
2565-758_REV_I • 04/2014
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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ASSEMBLY INSTRUCTIONS
The 2987 NH3 Magnum coulter is designed to mount to rectangular toolbars in three sizes: 5” x
7”, 6” x 6”or 7” x 7”.
WARNING:
lockups.
WARNING:
The Avenger coulter can be mounted to the toolbar using different techniques. One way is to
mount the main arm assembly to the toolbar and then attach the components one at a time.
Another way is to completely assemble the avenger coulter before attaching to the toolbar frame.
NOTE: To aid the assembly of the opener, it is recommended that a stand be constructed to
temporarily attach the opener and hold it in an upright position.
CAUTION:
attention to lifting techniques while handling and or maneuvering the coulter during assembly is
very important. Failure to do so may lead to personal injury or death.
STEP 1. Mark the toolbar frame as to the location that each coulter is to be mounted.
Right hand assemblies are usually mounted on the right hand side of the toolbar and the left hand
assemblies are mounted on the left hand side of the toolbar.
Never work under the toolbar while in a raised position without using safety
Use extreme caution, the blade is sharp and may cause bodily injury.
The 2987 NH3 Magnum coulter and its components are very heavy. Extra
NOTE: The coulter blade is in line with the edge of the mount bracket, for a reference use the
edge of the mounting bracket (right hand edge for a right hand and left hand edge for a left hand)
to align with the mark on the toolbar so that the coulters are mounted at the desired spacing.
STEP 2. Attach the main arm assembly to the toolbar using 2) 2986-306 mounting straps,
4) hex head bolts, ¾” lock washers and ¾” hex nuts.
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ASSEMBLY INSTRUCTIONS
Step 1. Install the ½” x 2 ½” bolt, washer, bushing and lock
nut to the closing wheel arm.
I800-001-SEALER
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ASSEMBLY INSTRUCTIONS
Step 2. Attach the closing wheel arm and the torsion spring
to the knife mount, install the cotter pin and washer.
KNIFE MOUNT
I800-002-SEALER
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ASSEMBLY INSTRUCTIONS
Step 3. Attach the closing wheel assembly to the arm, use 3
washers, lock washer and hex nut.
I800-003-SEALER
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TOOLBAR FRAME HEIGHT ADJUSTMENT
Figure A. The toolbar frames are equally 26”-28” off the ground. To ensure that frame heights
are equal, it is important that measurements are taken. The tube frames should be parallel with
the soil surface.
Figure B. The hitch is set too low while the toolbar frames are not equal distance from the soil
surface.
NOTE: The illustrations are intended to show that the settings are critical. Tool frame levelness
and height adjustment are very important settings for correct performance of the coulters.
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