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

6.3 Roll Tension

Roll tension (the force holding the rolls together) is factory set with a spring type adjustable linkage.
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.

6.3.1 Adjusting Roll Tension

DANGER
Stop engine and remove key from ignition before leaving operator's seat for any reason. A child or even a
pet could engage an idling machine.
Before changing the factory adjusted roll tension, refer to
setting is ideal for your crop type.
1. Lower header fully.
2. Shut down the engine and the remove 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) within 1.77–2.16 in. (45–55 mm).
5. To increase the roll tension, loosen jam nut (A) and
turn the spring drawbolt (B) clockwise to tighten the
spring at each end of the roll. Set dimension (C) within
1.77–2.16 in. (45–55 mm).
IMPORTANT:
Turn each bolt equal amounts. Each turn of the bolt
changes the roll tension by approximately 10 lbf (44.5 N).
6. Tighten jam nut (A) against casting after adjusting
tension.
7. Close driveshields. Refer to
169457
OPERATING THE HEADER
5.4 Driveshields, page
5.4 Driveshields, page 30.
6.2.2 Adjusting Roll Gap, page 68
Figure 6.6: Roll Tension Spring (RH Side)
70
to ensure the roll gap
Revision G