Yetter 2996 Fertilizer Coulter - Manual (Page 5)

5
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. For 12-5/8” shank, end without hole is upper end.
2. Insert lock collar into pivot casting and slide shank up through casting and lock collar. If you wish to lock 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 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 17” coulter blade loosely to hub using four 1/2 x 1-1/2” carriage bolts, lockwashers and nuts.
4. Mount fertilizer knife and spacer block to rear support arm using two 1/2 x 3-1/2” Gr. 8 bolts, hardened flatwashers
and lock nuts. Place shims between knife and support arm as required to align knife point with blade.
5. Center blade on hub by rotating blade and watching clearance between knife and blade. Slide blade on hub as
required until the blade runs concentric, no run out on diameter. Tight four 1/2” nuts. The disc blade must run
concentric.
6. Adjust knife clearance to blade as close as possible. The high point of the blade should just clear the knife as
blade is rotated. Be sure blade rotates freely then tighten two 1/2” locknuts to 120 ft. lb. Re-check clearance, by
rotating blade one full revolution, after all bolts are tightened. See page 7.
7. Assemble clamp components loosely to planter front bar as shown in parts view of appropriate clamp.
8. Position coulter clamps either toward the inside or outside of the planter openers on each side of the planter to
equalize draft. Tighten four 1/2” nuts to secure the clamps.
9. Install coulters on planter by inserting shank up through clamps and tightening 5/8 x 1” setscrews.
10. 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 shank.
11. Set coulter depth by loosening setscrews in clamp castings. For John Deere 7000 front fold planters there may not
be enough up adjustment to operate coulter at proper depth, not more than hub deep. Not all toolbars on John
Deere planters operate at the same height. If necessary, cut off top of 1/12” diameter shank to allow proper
adjustment.
12. On John Deere 7000 front fold planters there are two hoses that may interfere with coulter operation. Loosen
hydraulic fittings and swivel hoses up out of the way to provide clearance when coulter flexes up.
13. If you have elected to let coulter swivel, set lock collar to allow swivel in one or both directions as required. If you
have elected to hold coulter rigid, set coulter straight with the direction of travel. Tighten set screw to 110 ft. lb.
torque maximum.
14. 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.
15. Grease three fittings on each coulter before operation. The hub bearings should be greased only a few times each
season. Do not forget the lower parallel arm grease zerk.
16. NEVER mount coulters under planter drive shaft to allow coulter blades to contact shaft when an obstacle is struck.
Coulters must be mounted so blade can always flex up and clear drive shaft.
NOTE: Dry fertilizer must be free of chunks greater that 1/4” in size to prevent plugging. Yetter
recommends using screened fertilizer or running fertilizer through screen when hoppers are filled. Clean
hoppers thoroughly at the beginning of season to prevent plugging problems.
The rubber dry fertilizer tube may appear to be ‘stretched’ when the planter is in the transport position.
This does not affect operation of the planter and should not be detrimental to the fertilizer tube.