Yetter 2991 Frame Mounted Spring Loaded Conservation Coulter - Manual (Page 4)

4
OPERATION
GENERAL
Yetter Model 2999 coulter can be set up to swivel or not to swivel as required. It is
preferable to allow the coulters to swivel usually.
When mounting 2999 coulters on 3-point or 2-point hitch planters, the coulters should be
set up to swivel, particularly if a 4-wheel drive tractor is to be used. This reduces the side
load on the coulter during operation.
In hard no-till conditions the desired operating depth may not be possible. Tighten spring
nut to maintain depth if spring is flexing rather than lower coulter to obtain maximum
depth.
Planter weight may limit operating depth in hard conditions, particularly with mounted or
semi-mounted planters. Be sure planter has enough weight to keep drive wheels on the
ground during operation or plant population can be drastically affected.
1. Set coulter blades to run vertical to the ground. Operating 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
endplay in the hub bearings to allow it to wobble. If necessary, remove hubcap
and cotter pin, adjust slotted nut to remove wobble, re-insert cotter pin and replace
hubcap.
4. 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.
5. Set front spring tension by adjusting ¾” lock nuts until ¾” of threads are exposed
above the nut. This should provide adequate down-pressure for most conditions.
If additional pressure is required the nut may be tightened down further. NOTE:
This will reduce vertical movement of coulter. Beware of obstacles and allow
adequate movement to clear them.
6. Grease (2) fittings on each coulter before operation and weekly thereafter. The
hub bearings should be greased only a few times each season.
7. NEVER mount coulters under planter drive shaft to allow coulter blade to contact
shaft when obstacle is struck. Coulters must be mounted so blade always can flex
up and clear drive shaft.