Roll Gap; Checking Roll Gap - MacDon R85 Operator's Manual

4.2 Roll Gap

Steel rolls condition the crop by crimping and crushing the stem in several places. This allows moisture to release
for quicker drying. The degree to which the crop is conditioned as it passes through the rolls is controlled by roll
gap. The roll gap is factory-set at 25.4 mm (1.0 in.), but it can be adjusted.
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. Set enough roll gap to achieve this result.
A larger gap may be desirable in thick stemmed cane-type crops. However, too large a gap may cause feeding
problems. Grass-type crops may require a smaller gap for proper feeding and conditioning.
IMPORTANT:
It's recommended that operators visually check the size of the gap if they are using settings below the factory
setting.\

4.2.1 Checking Roll Gap

DANGER
To avoid bodily injury or death from unexpected startup of the machine, always stop the engine and remove
the key from the ignition before leaving the operator's seat for any reason.
1. Lower the header fully.
2. Open the driveshield. Refer to
30.
3. Remove bolts (A) that secure conditioner shield (B).
4. Remove the shield (B).
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OPERATING THE HEADER
3.4 Driveshields, page
86
Figure 4.4: Conditioner Shield
Revision B