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
26.
3. Loosen nuts (B) and slide conditioner shield (A) up
to remove.
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.
5. If adjustment is required, refer to
Roll Timing, page 78.
NOTE:
Roll spacing not to scale in illustration.
6. Close the driveshield. Refer to
26.
169455
OPERATING THE HEADER
5.4 Driveshields, page
6.4.2 Adjusting the
5.4 Driveshields, page
77
Figure 6.7: Conditioner Shield
Figure 6.8: Conditioner Roll Timing
A - Center Roll Bars B - Roll Timing Distance
Revision F