MacDon R85 Rotary Disc 16 Foot Self-Propelled Windrower Headers - Manual (Page 78)

OPERATING THE HEADER
6.3 Roll Tension
The roll tension (the force holding the rolls together) is achieved with a spring type adjustable linkage that is preset
to maximum at the factory.
Heavy crops or tough forage that tend to separate the rolls require the maximum roll tension to ensure that material
is sufficiently crimped.
Light alfalfa and short grasses would require less roll 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.
To adjust the conditioner roll tension on a 16-foot header,
follow these steps:
1. Lower header to ground, shut down tractor, and
remove key from ignition.
2. Open the driveshield See Section 5.4 Driveshields,
page 28 .
3. To decrease the roll tension, turn the spring drawbolts
counterclockwise to loosen the springs.
4. 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) to
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).
5. Tighten jam nut (A) against casting after adjusting
tension.
6. Close driveshields. See Section 5.4 Driveshields, page
28 .
Figure 6.6: Spring Tension Dimension (RH Side)
A - Jam Nut B - Spring Drawbolt
C - Spring Tension Adjustment
1.77–2.16 in. (45–55 mm)
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Rev. F