MacDon R85 Operator's Manual page 141

IMPORTANT:
Blades should be replaced in pairs or the disc may
become unbalanced and cause damage to the cutterbar.
IMPORTANT:
The cutterblades have cutting edges on both sides so
the blades can be turned over and reused. The twist in
each blade determines if the cutting direction is clockwise
or counterclockwise. If you are unsure which direction
the spindles rotate, refer to
Rotation, page 129.
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MAINTENANCE AND SERVICING
7.6.3 Direction of Spindle
Figure 7.37: Counterclockwise Disc
Rotation Direction
Figure 7.38: Clockwise Disc Rotation Direction
131
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