Roll Tension; Adjusting Roll Tension - MacDon R85 Operator's Manual

4.3 Roll Tension

Roll tension (the force holding the rolls together) is factory set with a spring-type adjustable linkage.
The roll tension factory setting is the spring fully tensioned.
Heavy crops or tough forage tend to separate the rolls and require more tension to ensure material is sufficiently
crimped. Light alfalfa and short grasses require less tension to minimize over-conditioning.

4.3.1 Adjusting Roll Tension

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.
Before changing the factory adjusted roll tension, refer to
setting is ideal for your crop type.
1. Lower the header fully.
2. Stop the engine and the remove the key.
3. Open the driveshield. Refer to
30.
4. To decrease the roll tension, turn the spring drawbolts
counterclockwise to loosen the springs. Set
dimension (C) to 45–55 mm (1.77–2.16 in.).
5. To increase the roll tension, loosen jam nut (A) and turn
spring drawbolt (B) clockwise to tighten the spring at
each end of the roll. Set dimension (C) to 45–55 mm
(1.77–2.16 in.).
IMPORTANT:
Turn each bolt equal amounts. Each turn of the bolt
changes the roll tension by approximately 44.5 N
(10 lbf).
6. Tighten jam nut (A) against casting after adjusting
tension.
7. Close the driveshield. Refer to
30.
214366
OPERATING THE HEADER
4.2.2 Adjusting Roll Gap, page 87
3.4 Driveshields, page
3.4 Driveshields, page
89
B
C
Figure 4.12: Roll Tension Spring (Right Side)
to ensure the roll gap
A
Revision A