MacDon R85 Rotary Disc 13 Foot Self-Propelled Windrower Header - Manual (Page 82)

OPERATING THE HEADER
4. Measure the roll timing distance (B) at each end
of the rolls. Each steel bar on one roll should be
centered between two bars of the other roll so that (B)
is approximately equal on both sides of the bar.
NOTE: If adjustment is required, see Section
6.4.2 Adjusting the Roll Timing, page 74 .
NOTE: Roll spacing not to scale in illustration.
5. Close the driveshield. See Section 5.4 Driveshields,
page 28 .
Figure 6.8: Conditioner Roll Timing
A - Center Roll Bars B - Roll Timing Distance
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.
2. Manually rotate upper roll until it stops. Make a mark
on yoke flange to align with the center of one of the bolt
heads (A).
3. Manually rotate upper roll in opposite direction until it
stops. Make a second mark on yoke flange to align
with the bolt.
4. Determine the center between the two marks and mark
a third line on the yoke flange.
5. Rotate the upper roll until the bolt lines-up with the
third line.
6. Tighten bolts (A) to secure the position. Torque to
70 ft·lbf (95 N·m).
NOTE: For additional conditioning action in
lighter or tine stem crops, the distance
between the conditioner roll bars can be
adjusted (advanced timing).
Figure 6.9
169455
74
Rev. E