MacDon R80 Rotary Disc - Manual (Page 74)

MAINTENANCE/SERVICE
Form # 169089
72
Model Year - 2009
7.9.8 Hourglass Deflector Drive Belts –
16 Ft Only
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.
7.9.8.1 Belt Tension
a. Lower header fully, shut off engine and remove
key.
b. Open LH and RH drive shields.
c. Apply force of 51 lbf (22 N) to each deflector
drive belt at mid-span. Deflection of each belt
should be 0.12 in. (3 mm).
IMPORTANT
To prolong belt and drive life, do not over-
tighten belts.
d. If necessary, adjust as follows:
1. Loosen nuts (A).
2. Loosen jam-nut (B) on adjuster bolt (C).
3. Turn adjuster bolt to adjust tension.
4. Tighten nuts (A) and jam-nut (B).
e. Re-adjust tension of a new belt after a short run-
in period, (about 5 hours).
7.9.8.2 Belt Replacement
a. Lower header fully, shut off engine and remove
key.
b. Open cutterbar door(s).
c. Open LH and RH drive shields.
CAUTION
Exercise caution when working around the
blades. Blades are sharp and can cause
serious injury. Wear gloves when handling
blades.
(continued next page)
RH SIDE
LH SIDE
B
C
A
B
C
A