MacDon R85 Rotary Disc 16 Foot Self-Propelled Windrower Headers - Manual (Page 80)

OPERATING THE HEADER
4. Measure the clearance (B) between the flats of the
conditioner roll bars at both end of the conditioner
rolls. Dimension (B) should be set to 0.35–0.51 in.
(9–13 mm). If adjustment is required, see Section
6.4.2 Adjusting the Roll Timing, page 72
NOTE: There should be less than 0.08 in. (2 mm)
difference between the two ends of the
conditioner roll.
NOTE: Roll spacing not to scale in illustration.
5. Close the driveshield. See Section 5.4 Driveshields,
page 28 .
Figure 6.8: Roll Timing
A - Crop Flow
B - Roll Timing Distance 0.35–0.51 in. (9–13 mm)
6.4.2 Adjusting the Roll Timing
Follow these steps to adjust the roll timing (if necessary):
1. Loosen four bolts (A) in slots of yoke plate (B) on upper
roll universal shaft.
Figure 6.9
2. Locate roll timing gauge (B) on frame member under
the flange. Remove nut (A) to remove gauge.
Figure 6.10: Roll Timing Gauge
A - Nut B - Timing Gauge MD #150572
169457
72
Rev. F