Adjusting Roll Gap (Polyurethane Rolls) - MacDon R116 Unloading And Assembly Instructions

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 the
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.

7.11.2 Adjusting Roll Gap (Polyurethane Rolls)

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 disc mower to the ground.
2. Stop the engine, and remove the key from the ignition.
3. Loosen upper jam nut (A) on both sides of conditioner.
4. Turn lower nut (B) counterclockwise until upper roll
rests on lower roll.
5. Turn lower nut (B) one full turn clockwise to raise the
upper roll and achieve a 3 mm (1/8 in.) roll gap.
6. Hold nut (B) and tighten jam nut (A) on both sides of the
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. Rotate the rolls manually and use a feeler gauge at the
ends of the rolls to check that the actual gap is no less
than 2 mm (5/64 in.) and no more than 4 mm (5/32 in.).
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PERFORMING PREDELIVERY CHECKS
141
Figure 7.22: Roll Gap Adjustment
Figure 7.23: Roll Gap Adjustment
A
B
A
B
Revision A