Yetter Avenger 30 Coulter - Manual (Page 16)

16
OPERATION
Yetter Model 2986 30” coulter is designed to inject fumigant up to 12” deep. See your chemical dealer or
manufacturer for recommended depth and row spacing for the chemical that is to be used for your particular
application. A popular placement setting is 12” below the soil surface and 12” row spacing between
coulters.
IMPORTANT: For proper operation, the toolbar frame must operate level (for and aft) and at the correct height,
usually 22” – 25” while in operation.
In hard no-till conditions the desired operating depth may not be possible. Tighten the spring pressure
adjustment to obtain maximum depth if spring is flexing rather than lower the toolbar frame below the 22”
minimum recommended setting.
Toolbar weight may limit operating depth in hard soil conditions, particularly with tractor mounted toolbars.
Add ballast to the toolbar frame. Example, 200 lb. per coulter has been added to get desired depth. The
tractor may have to be equipped with a rear hitch hydraulic down force kit to obtain the optimum toolbar
frame operating height of 22”-25”. Blade operating depth is affected by spring tension, toolbar height,
levelness of toolbar for and aft and soil conditions. As soil conditions change, toolbar settings and coulter
adjustments will need to be changed as well.
Toolbar gauge wheel kits are optional, but recommended for use with the Avenger coulter because of
toolbar frame height being very critical.
1. Set/mount coulter blades to run vertical to ground. Operation depth and blade wear can be affected if
coulter is mounted crooked or if toolbar is not level side to side.
2. After a few hours use, check all bolts and setscrews for tightness and proper torque settings.
3. After a day of use (10-12 hours), 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, recommended torque of 13 ft/lbs, re-insert cotter pin and replace hub cap. If the wobble
or looseness can not be corrected, the bearings, cups and seal will need to be replaced. DO NOT RE-
USE WORN OR DAMAGED PARTS.
4. KNIFE ADJUSTMENT IS CRITICAL. Adjust knife-blade clearance regularly, see page 8 of this manual.
Blade wear can affect operation in loose soil conditions. If knife adjustment does not stop plugging
problems, it may be necessary to replace the 30” blade.