Roll Timing; Checking Roll Timing - MacDon R85 Operator's Manual

6.4 Roll Timing

For proper conditioning, the rolls must be properly timed with each steel bar on one roll centered between two bars
of the other roll. The factory setting should be suitable for most crop conditions.
IMPORTANT:
Roll timing is critical when the roll gap is decreased because the bars may contact each other if the timing is wrong.

6.4.1 Checking Roll Timing

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 timing, follow these steps:
1. Lower header fully.
2. Open the driveshield. Refer to
30.
3. Loosen nuts (A) and slide conditioner shield (B) up to
remove it.
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, refer to
Adjusting the Roll Timing, page
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. Refer to
30.
169457
OPERATING THE HEADER
5.4 Driveshields, page
6.4.2
72.
5.4 Driveshields, page
71
Figure 6.7: Conditioner Shield (LH Side)
Figure 6.8: Roll Timing
A - Crop Flow
B - Roll Timing Distance 0.35–0.51 in. (9–13 mm)
Revision G