MacDon R85 Rotary Disc 13 Foot - Manual (Page 87)

MAINTENANCE AND SERVICING
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85
Revision C
7.5.4 Cutter Blades
Each disc has two cutter blades attached to either
end, and are free to swivel horizontally on a
specially designed shoulder bolt.
The blade, with two cutting edges, can be flipped
over so that the blade does not need to be
replaced as often.
The blades are NOT repairable, and must be
replaced if severely damaged or worn.
IMPORTANT
Always use factory replacement parts.
7.5.4.1 Inspection
CAUTION
Cutter blades have two cutting edges.
Exercise caution when working around the
blades. Blades are sharp, and can cause
serious injury. Wear gloves when handling
blades.
CAUTION
Damaged blades may damage the cutterbar,
and result in poor cutting performance.
Replace damaged blades at earliest possible
opportunity.
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. Check daily that the cutter blades are securely
attached to the disc.
b. Check blades for cracks, wear beyond safe
operating limits, and distortion.
c. Replace blades immediately if any of these
problems occur.
IMPORTANT
Blades should be replaced in pairs,
otherwise the disc may be unbalanced, and
damage the cutterbar.
IMPORTANT
The cutter blades have cutting edges on
both edges so that the blade can be turned
over and re-used. The twist in each blade
determines if its cutting direction is
clockwise or counterclockwise.
CLOCKWISE DISC
COUNTERCLOCKWISE DISC
ROTATION DIRECTION
ROTATION DIRECTION
BLADE WEAR TO
CENTERLINE
0.81 in.
(20.6 mm)
ELONGATED HOLE