SECTION 6
6-3
THRESHING, SEPARATION AND CLEANING
CONCERN POSSIBLE CAUSE CORRECTION PAGE
Excessive cracked grain in
tank.
Drum speed too high. Reduce drum speed and/or open
concave slightly.
4-27
Excessive tailings. See the concern described under
‘‘Excessive tailings’’, below.
--
Concave clogged, or openings
blocked by de-awning plates.
Clean concave and open de-awn-
ing plates.
4-32
Concave not parallel to drum. Adjust concave parallel to the
drum.
4-28
Grain being cracked in elevator. Adjust grain elevator chain ten-
sion.
5-25
Clearance between drum and
concave too small.
Increase concave clearance.
Reduce drum speed slightly.
4-28
Uneven feeding, or wads enter-
ing drum.
Adjust straw elevator chain.
Check feed auger height and
retractable finger adjustment.
4-18
Separate
Header
Manual
Not enough material entering
combine.
Lower header and increase
ground speed.
--
Grain loss over Twin Flow
rotor.
Straw walkers running at incor-
rect speed.
Check speed of intermediate
shaft. Correct speed is 800 rpm
(with empty machine).
--
Straw walkers overloaded due to
excessive ground speed.
Reduce ground speed to de-
crease amount of material enter-
ing combine. Raise header. In-
crease concave-to- drum clear-
ance if straw walkers have be-
come clogged due to the straw be-
ing broken up excessively. (It may
be necessary to reduce concave-
to-drum clearance if overloading
is the result of imcomplete thresh-
ing. In this case, it may be desir-
able to increase the drum speed).
--
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