Yetter 2995 Generation III Coulter - Manual (Page 8)

8
OPERATION
1. Set coulter blades to run vertical to ground. Operation depth and blade wear can be affected if coulter
is mounted crooked. If coulters are set-up to not swivel be sure they run straight with the direction of
travel.
2. After a few hours use, check all bolts and setscrews for tightness.
3. After a few days use, check coulter hubs for loose bearings. There should be no end play in the hub
bearings to allow it to wobble. If necessary, remove hub cap and cotter pin, adjust slotted nut to
remove wobble, re-insert cotter pin and replace hub cap.
4. KNIFE ADJUSTMENT IS CRITICAL. Adjust knife-blade clearance regularly, see page 9.
An optional knife scraper, Part #2970-133 or 2976-133 is available to reduce the frequency of
adjustment on the fertilizer coulter knife. In addition this allows better operation in tough conditions
such as freshly disked soils with abundant trash in the top four inches of loose soil.
NOTE: A ‘bump’ will appear behind knife scraper, on blade where protected, this must be ground off
periodically to maintain correct knife-blade clearance.
5. BLADE WEAR can affect operation in loose trash conditions. If knife adjustment does not stop
plugging problems, it may be necessary to replace blade.
6. 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.
NOTE: 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.
2970-133 17” Knife Scraper
Key Qty. Part No. Description
1 1 2970-353 Double Edge Knife Scraper
2 1 2502-199 5/16-18 x 3/4 HHCS Gr. 5 ZP
3 1 2526-201 5/16 Std. Flat washer ZP
4 1 2520-205 5/16-18 Lock Hex Nut ZP
2976-133 20” Knife Scraper
Key Qty. Part No. Description
1 1 2976-353 Double Edge Knife Scraper
2 1 2502-199 5/16-18 x 3/4 HHCS Gr. 5 ZP
3 1 2526-201 5/16 Std. Flat washer ZP
4 1 2520-205 5/16-18 Lock Hex Nut ZP