Adjusting Roll Gap: Steel Rolls - MacDon R113 Operator's Manual

3.14.3 Adjusting Roll Gap: Steel Rolls

The length of thread extending above the jam nut on the adjustment rods can be used as an approximation of roll
gap but does NOT provide consistent roll gap measurements. To ensure roll gap is at the factory setting, follow the
procedure below.
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 self-propelled disc header fully.
2. Stop engine and remove key.
3. Loosen jam nut (A) on both sides of conditioner.
4. Turn lower nut (B) counterclockwise until upper roll
rests on lower roll. Ensure rolls intermesh.
5. Turn lower nut (B) two and a half full turns clockwise to
raise upper roll and achieve a 6 mm (1/4 in.) roll gap.
6. Hold nut (B) and tighten jam nut (A) on both sides of
header.
IMPORTANT:
Make sure roll gap adjustment nuts are adjusted equally
on both sides of the header to achieve a consistent gap
across the rolls.
7. If further adjustment to roll gap is required:
•
Turn lower nut (B) clockwise to increase roll gap.
•
Turn lower nut (B) counterclockwise to decrease
roll gap.
NOTE:
Make further adjustments to roll gap based on header
performance and crop conditions.
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OPERATION
Figure 3.134: Roll Gap Adjustment
86
A
B
Revision A