MacDon R80 Rotary Disc - Manual (Page 75)

MAINTENANCE/SERVICE
Form # 169089
73
Model Year - 2009
Driveline (LH) Side
a. Remove outboard hourglass deflector and
driveline. Refer to Section 7.8.6.1 Driveline
Deflector.
b. Loosen hourglass deflector drive belts (A) as
follows:
1. Loosen nuts (B).
2. Loosen jam-nut (C) on adjuster bolt (D).
3. Turn adjuster bolt (D) to loosen belts (A) so
they can be slipped off both pulleys.
c. Feed belts through opening (E) to disengage
from gearbox drive shaft.
IMPORTANT
Belts are a matched set. Replace both
drive belts even if only one needs
replacing.
d. Feed new belts through opening (E) and onto
gearbox drive shaft.
e. Position belts on pulleys and tension the belts
with adjuster bolt (D). 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.
f. Manually turn drive system and re-check
tension. Adjust as required.
g. Tighten nuts (B) and jam-nut (C).
h. Re-install hourglass deflector. Refer to Section
7.8.6.1 Driveline Deflector.
Driven Side (RH)
a. Loosen hourglass deflector drive belts (F) as
follows:
1. Loosen nuts (G).
2. Loosen jam-nut (H) on adjuster bolt (J).
3. Turn adjuster bolt (J) to loosen belts (F) so
they can be slipped off both pulleys.
b. Remove nuts (K) and bolts, and lift drive
assembly (L) out of driveline and free of belts.
IMPORTANT
Belts are a matched set. Replace both
drive belts even if only one needs
replacing.
c. Locate new belts over driveline opening.
d. Re-install drive assembly (L) onto driveline and
install bolts and nuts (K) and tighten.
e. Position belts on pulleys and tension the belts
with adjuster bolt (J). 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.
f. Manually turn drive system and re-check
tension. Adjust as required.
g. Tighten nuts (G) and jam-nut (H).
h. Close drive shields and cutterbar doors.
i. Re-check belt tension after 5 hours of operation.
H
J
F
G
C
D
A
B E
L
K