Such as hard thresh springs wheats in Dakotas, Montana, and Canada.
Here are some suggested that we have used in North America. This will help you get a good start and you can adjust accordingly to your conditions.
Concaves: Use Hard Thresh Module in Number 1 position Right, and perhaps a Hard Thresh Module in Number 1 position Left. The Number 2 module position right and left can be normal small wire concaves. In order to get best threshing, make sure the concaves have been zero adjusted and the concave are level to the rotor front to back (see operators manual if you need to adjust). Note: If you are getting whole heads, or partial heads in the grain tank, use the cover plates above the 2nd module position to cover those open holes on top of rotor cage.
Grate Area: Use Large Skip Wire in grate area. (Note: Large Wire or Slotted modules can be used in grate area if the straw is brittle to help prevent broken straw on sieves.)
Rotor Configuration: Recommend standard rotor rasp bar configuration. Normal AFX Rotor with 8 spike bars on rear half. Note: There should be no straight Separator bars on the rotor.
Vanes: Mid Position
Rotor Speed: 750 – 1050 RPM. Use 3rd Range in rotor gearbox. (Make sure there are no straight bars on the rotor.)
Concave Clearance: 5 mm or thickness of wheat seed. With Hard Thresh, you can go tighter. If you have really, really hard thresh wheat, you can put cover plate under Number 1 Right Hard thresh module. (early model flagship combines with early software may read as a 1 to 2 setting.
Ground Speed: A key principal with a Axial Flow is grain on grain threshing. If you have a few white caps, try driving a bit faster to get more grain in for more grain on grain threshing!
Pre Sieve: Using 1 and 1/8th inch pre sieve – Louver opening should be thickness of a wheat seed or 0.4 or tighter. (If you ever get grain in the cleaning fan, chances are you have the pre-sieve too wide.)
Chaffer Sieve: Using 1 and 1/8th inch grain chaffer sieves-15 mm or about 9/16 inches.
Shoe Sieve: Using 1 and 1/8th inch grain shoe sieves- 8 mm or about 5/16 inches.
Fan Speed: 900 to 1050 RPM
Chopper: Highly Recommend using the chopper grate cover plate. This will cover up the holes under the chopper to prevent brittle straw falling on the sieves. Those that use it, speak very highly of it! See part number below. High Speed with stationary knives engaged. (If you are going to windrow and want to set the chopper to Low Speed, be sure to drop the stationary knives all the way down. Never, Never chop in low speed. If chopper is going to be in low speed, make sure stationary knife pack is dropped down!)
Wheat Settings and Performance Information:
For operators in the Dakota’s, Montana, Canada: For best Wheat Samples, it is suggested to use the cover plates on the upper cage above the #2 modules. It is also suggested to use the cover plate over the chopper pan grate. Pictures and part numbers are listed below.
Other Notes for High Performance Settings:
- Some folks can use a number 3 (20 series would be about 10 mm) setting for the concaves and then drive faster in order to add more material to thresh the grain (more material on material threshing).
- Some folks like to put covers on the upper side of the cage over the number 2 module. This can reduce the amount of broken straw and chaff on the cleaning system. There are also covers for the upper cage over modules 3 and 4.
- Another little trick is to put cover over the chopper grate to reduce broken stems and chaff from coming down and overloading the sieves. Any of these covers are available from Case IH dealers.
- Make sure to check levelness of the combine front to back (Keel angle). The rear of the combine should not be anymore than 3.5 to 4 degrees Max, higher than the front. This can be checked by putting the combine on a level floor and using a angle finder on the Main frame.
Part Numbers
Hard Thresh kits, cover kits/plates:
87748389 This is hard thresh Rotor Kit. (It includes #1R & #1L concave modules with concave covers.) It also includes 2 upper cage covers that go in the upper cage above the #2 modules both left and right side . If you want just the Hard Thresh module. #1R is 87741400. #2L is 87741402. This is a great kit if you have hard thresh wheat. A lot of folks can get by with just the #1R module (P/N 87741400).
Upper Cage Filler Covers over Concave Area:
87584185 is the part number for the upper Cage filler plate service kit. (kit includes both L.H. and R.H. cage filler plates) These plates would go above the #2 Module section. Use these if you have whole wheat heads, or partial heads in your grain tank. They will keep loose brittle heads in the rotor for another 2nd and 3rd rotation in the threshing cycle. See Picture.
Chopper discharge Grate Cover Kit for 20 series combines and 10 series combines after HAJ202001
Use Parts Service Kit 73340388. This is the cover and the hardware. (For model year 2008 and newer)
Chopper discharge Grate Cover Kit for 10 series combine before HAJ202001
Use 84083460 Beater Discharge grate cover kit.
Upper cage cover plates above separator area
This would be in real brittle straw conditions in which your are trying to keep broken straw off the sieves. Cover plate kit is 84084762. (This kit includes 4 small covers and hardware.) Usually only need one kit. The best place to install plates in the upper cage is above #3R module toward front and above #4 R module toward rear. Then, same on Left side, above #3L toward front and above #4L toward the rear. Make sure they go in upper part of cage above these modules.
Manual Adjustable Residue Deflector Kit
An adjustable deflector is available as a dealer installed kit (part number 87328003) for 20 Series combines (72/82/9230 series have this standard from factory with a chopper). This kit is used where you may have wet damp straw or damp soybean straw loading on the right side of the rotor and notice more residue on the right side than the left side. It goes on the right hand side between the back of the rotor and the chopper. The deflector is adjustable, allowing you to better direct straw through the chopper and to the spreaders. (In order to get more even spread pattern from right to left side.) The kit is available for machines after serial number HAJ202001. 20 series combines equipped with the Magna cut chopper have this as standard equipment. In normal straw moisture conditions, the residue can be managed very nicely without it. However, for those folks that may have to combine in extreme tough straw conditions and want the ultimate residue management spreading, see your Case IH dealer about this kit. (provided it is after above serial number listed.)
