Adjusting Roll Timing - MacDon R85 Operator's Manual

4.4.2 Adjusting Roll Timing

Follow these steps to adjust the roll timing (if necessary):
1. Lower the header fully.
2. Stop the engine and remove the key.
3. Open the driveshield. Refer to
28.
4. Loosen four bolts (A) in slots of yoke plate (B) on upper
roll universal shaft.
5. 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).
6. Manually rotate upper roll in opposite direction until it
stops. Make a second mark on yoke flange to align
with the bolt.
7. Determine the center between the two marks, and
mark a third line on the yoke flange.
8. Rotate the upper roll until the bolt lines-up with the
third line.
9. Tighten bolts (A) to secure the position. Torque to
95 N·m (70 ft·lbf ).
NOTE:
For additional conditioning action in lighter or thin
stem crops, the distance between the conditioner
roll bars can be adjusted (advanced timing).
10. Close the driveshield. Refer to
28.
147757
OPERATING THE HEADER
3.4 Driveshields, page
3.4 Driveshields, page
80
Figure 4.9: Yolk Plate (Upper Roll)
Revision B