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Revision A
3.16
Conditioning: Roll Type
Rolls condition the crop by crimping and crushing the stem in several places allowing the release of moisture, resulting in
faster drying times. Both steel and polyurethane conditioner rolls are available.
3.16.1
Roll Gap
The roll gap controls the degree to which crop is conditioned as it passes through the rolls. Roll gap is factory-set at
approximately 3 mm (1/8 in.) for polyurethane rolls, and at 6 mm (1/4 in.) for steel rolls.
Polyurethane rolls are better suited for crushing stems while providing reduced crimping and are recommended for alfalfa,
clover, legumes, and similar crops. Correct crop conditioning is achieved when 90% of the stems show cracking, but no
more than 5% of the leaves are damaged. Set the roll gap to produce these results.
Steel rolls can be operated over a larger range of roll gap settings (intermesh) and are therefore suited to a wider range of
crops (alfalfa to thicker-stemmed cane-type crops) using a roll gap of up to 25 mm (1 in.); however, too large of a gap may
cause feeding problems.
Grass-type crops may require less gap for proper feeding and conditioning.
IMPORTANT:
If using settings below the factory setting, visually inspect the roll gap.
Checking Roll Gap
WARNING
To avoid injury or death from unexpected start-up of machine, always stop the engine and remove the key from the
ignition before leaving the operator
’
s seat for any reason.
1.
Lower the rotary disc pull-type fully.
2.
Shut down the engine, and remove the key from the ignition.
1003755
Figure 3.119: Polyurethane Roll Conditioner
3.
Insert a feeler gauge through the inspection hole in the
conditioner endsheet to check roll gap on polyurethane roll
conditioners. Factory setting is 3 mm (1/8 in.).
