MacDon R85 Rotary Disc 13 Foot Pull-Type - Manual (Page 72)

MAINTENANCE AND SERVICING
Form 169454
70
Revision A
7.8.4 Cutter Blades
Each disc has two cutter blades attached to
either end. These blades 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.
7.8.4.1 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 counter clockwise.
CLOCKWISE DISC
COUNTER CLOCKWISE DISC
ROTATION DIRECTION
ROTATION DIRECTION
BLADE WEAR TO
CENTERLINE
0.81 in.
(20.6 mm)
ELONGATED HOLE