MacDon R85 Rotary Disc 13 Foot - Manual (Page 88)

MAINTENANCE AND SERVICING
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86
Revision C
7.5.4.2 Replacement
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.
DANGER
To avoid bodily injury or death from
unexpected start-up or fall of raised machine:
stop engine, remove key, and engage lift
cylinder lock-out valves before going under
machine for any reason.
a. Raise header fully, shut off engine, and remove
key.
b. Engage lift cylinder lock-out valves.
c. Open cutterbar door(s).
d. Rotate disc (A) so that blade (B) faces forward,
and lines up with hole (C) in rock guard.
e. To prevent disc rotation while loosening blade
bolts, place a block of wood between two discs.
f. Clean debris from blade attachment area.
g. Remove nut (D).
h. Remove shoulder bolt (E), and blade (B).
i. Install new or reversed blade (B) with shoulder
bolt (E) onto disc.
j. Install nut (D). Tighten nut to 100 ft·lbf (135 N·m).
k. Remove block of wood (if used).
WARNING
Ensure cutterbar is completely clear of
foreign objects. These objects can be ejected
with considerable force when the machine is
started, and may result in serious injury or
machine damage.
l. Close doors.
D
E
B
DISC ROTATION
A
B
C