Roll Timing; Checking Roll Timing - MacDon R1 Series Operator's Manual

3. Loosen jam nut (A) on both sides of the conditioner.
4. Turn spring drawbolt (B) clockwise to tighten spring (C) and
increase the roll tension.
5. Turn spring drawbolt (B) counterclockwise to loosen
spring (C) and decrease the roll tension.
6. Measure the amount of exposed thread on spring
drawbolt (B) at each end of the conditioner.
Measurement (D) should be 12 15 mm (1/2 9/16 in.) for
both polyurethane and steel roll conditioners.
IMPORTANT:
Turn each bolt equally. Each turn of the bolt changes the
roll tension by approximately 32 N (7.2 lbf).
7. Tighten jam nuts (A) on each end of the conditioner.

3.16.3 Roll Timing

For proper conditioning, the rolls must be properly timed so that the bar on one roll is centered between two bars on 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
conditioning is affected and the bars may contact each other.

Checking Roll Timing

Check the roll timing if excessive noise is coming from the conditioner rolls.
The roll timing is factory-set and should not require adjustment; however, if there is excessive noise coming from the
conditioner rolls, the timing will need to be adjusted.
Listen to the rollers. Excessive noise may come from dirt build-up, or the rollers being out of time (and would therefore
require adjustment).
For instructions, refer to Adjusting Roll Timing, page
262634
OPERATION
Figure 3.122: Adjusting Roll Tension
Figure 3.123: Properly Timed Rolls
111.
110
B
D
A
C
= =
Revision A