MacDon R85 Operator's Manual page 77

4. Loosen upper jam nut (B), on both sides of conditioner
adjustment bolts.
5. To increase roll gap, turn lower nut (A) clockwise.
6. To decrease roll
counterclockwise.
7. Measurement at (C) should be 1-3/16 in. (30 mm).
8. Once adjustment is complete, hold nut (A) and torque
jam nut (B) to 75 lb·ft (102 N·m).
NOTE: When adjusting roll gap, be sure that the
thread protruding at the adjustment is
the same on both ends of the conditioner
rolls. This will achieve consistent
intermesh across the rolls.
9. Check roll gap, see Section
page 67.
IMPORTANT
Roll timing is critical when the roll gap is
decreased because the bars may contact each
other if the timing is wrong.
10. See Section 6.4 Roll Timing, page 71
on checking the timing.
11. Close the driveshield. See Section
page 28.
169457
OPERATING THE HEADER
gap, turn lower nut
6.2.1 Checking Roll Gap,
for instructions
5.4 Driveshields,
(A)
Figure 6.5: Roll Gap Adjustment Bolt
A - Lower Nut
C - 1-3/16 in. (30 mm)
69
B - Upper Jam Nut
Rev. F