MacDon HC10, Original Instruction

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Revision A
4.9 Conditioner Operation
WARNING
Keep hands and feet away from discharge opening. Keep everyone at least 100 meters (330 ft.) 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 start-up 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
1005156
A
B
Figure 4.31: Roll Gap
A - Crop Direction B - Roll Gap
Intermeshing 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 (refer to
illustration at right). The gap is factory set at 20 mm (3/4 in.) 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.
Grass type crops may require less gap for proper feeding and
conditioning. A larger gap (up to 25 mm [1 in.]) may be
desirable in thick-stemmed cane-type crops; however, too large
a gap may cause feeding problems.
1005058
A
B
C
Figure 4.32: Roll Gap Gauge
If required, you can adjust the roll gap by loosening nut (A) and
turning adjuster (B). Retighten nut (A) after adjusting.
IMPORTANT:
When adjusting roll gap, be sure that the gauge (C) reading is the
same on both sides of the conditioner roll to achieve consistent
intermesh across the rolls.
OPERATION