MacDon R85 Rotary Disc 13 Foot Self-Propelled Windrower Header - Manual (Page 80)

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 , follow these steps:
1. Lower the header fully.
2. Shut down the engine and remove the key.
3. Open the driveshield See Section 5.4 Driveshields,
page 28 .
4. To decrease the roll tension, turn the spring drawbolts
counterclockwise to loosen the springs.
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. Spring is fully tensioned at the
factory.
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 the driveshield. See Section 5.4 Driveshields,
page 28 .
Figure 6.6: Spring Tension Dimension (LH Side)
A - Jam Nut B - Spring Draw Bolt
169455
72
Rev. E