MacDon HC10 for D-Series - Manual (Page 88)

OPERATION
4.9 Conditioner Operation
WARNING
Keep hands and feet away from discharge opening. Keep everyone several hundred feet away from
your operation. Never direct the discharge toward anyone. Stones or other foreign objects can be
ejected with force.
WARNING
To avoid bodily injury or death from unexpected startup of machine, stop engine and remove key before
adjusting rolls.
4.9.1 Roll and Feed Draper Speed
The roll and feed draper speeds change whenever the header knife speed is changed since the drives use the same
hydraulic circuit. They cannot be independently adjusted.
4.9.2 Adjusting Roll Gap
Steel rolls condition the crop by crimping and crushing the
stem in several places. This allows moisture release for
quicker drying. The degree to which the crop is conditioned
as it passes through the rolls is controlled by roll gap. See
illustration. The gap is factory set at 0.75 in. (20 mm) or at
1.5 line on gauge. Gauge readings should be the same at
both ends of the roll.
Correct conditioning of alfalfa, clover and other legumes is
usually indicated when 90% of the stems show cracking,
but no more than 5% of the leaves are damaged. Use only
enough roll gap to achieve this result.
A larger gap (up to 1 inch [25 mm]) may be desirable in
thick-stemmed cane-type crops; however, too large a gap
may cause feeding problems.
Grass type crops may require less gap for proper feeding
and conditioning.
The intermeshing steel rolls of the
hay conditioner crimp the plant stems in several places,
allowing moisture release and quicker drying.
Figure 4.31
A - Crop Direction B - Roll Gap
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Rev. D