MacDon R85 Rotary Disc 13 Foot - Manual (Page 55)

OPERATION
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Revision C
6.12.4 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 as
shown. 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.
To check roll timing ‘X’, proceed as follows:
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.
a. Lower header fully, stop engine, and remove key
from ignition.
b. Open the driveshield. See Section 6.2.2
Driveshield.
c. Examine roll timing (distance ‘X’) at each end of
the rolls with the header fully lowered. Each
steel bar on one roll should be centered
between two bars of the other roll so that
distance ‘X’ is approximately equal on both
sides of the bar.
6.12.4.1 Roll Timing Adjustment
Adjust roll timing, if necessary, as follows:
a. Loosen four bolts (A) in slots of yoke plate on
upper roll universal shaft.
b. Manually rotate upper roll it stops. Make a mark
on yoke flange to align with the center of one of
the bolt (A) heads.
c. Manually rotate upper roll in opposite direction
until it stops. Make a second mark on yoke
flange to align with the bolt.
d. Determine the center between the two marks,
and mark a third line on the yoke flange.
e. Rotate the upper roll until the bolt lines up with
the third line.
f. Tighten bolts (A) to secure the position. Torque
to 70 lbf·ft (95 N·m).
A
CROP
X