Sickle Drive Belts: A40-D - MacDon A30-S Operator's Manual

7.8.11 Sickle Drive Belts: A40-D

7.8.11.1 Tension Adjustment: LH Sickle Drive
Belts - A40-D
IMPORTANT
To prolong belt and drive life, do not over-
tighten belts.
Timing Belt
CAUTION
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. Open shield on LH side of the header.
D
B
b. Loosen three nuts (B), and jam-nut on adjuster
bolt (C).
c. Turn adjuster bolt (C) to move pulley (D) until a
force of 5 - 6.5 lbf (22 - 30 N) applied at
mid-span deflects belt (A) 0.55 in. (14 mm).
d. Tighten jam-nut at (C), and three nuts (B).
e. Re-adjust tension of a new belt after a short
run-in period, (about 5 hours).
Form 169000 / 169040
SECTION 7 MAINTENANCE AND SERVICING
C
A
Double V-Belts
a. Loosen three nuts (F), and jam-nut on adjuster
bolt (G).
b. Turn adjuster bolt (G) to move pulley (H) until a
force of 8 - 12 lbf (35 - 50 N) applied to each belt
at mid-span
0.16 in. (4 mm).
c. Tighten jam-nut at (G), and three nuts (F).
d. Close endshield.
e. Re-adjust tension of a new belt after a short
run-in period, (about 5 hours).
7.8.11.2 Removal: LH Sickle Drive Belts - A40-D
Double V-Belts
a. Open shield on LH side of the header.
b. Loosen three nuts (F), and jam-nut on adjuster
bolt (G).
c. Turn adjuster bolt (G) so that drive belts (E) can
be slipped off pulleys (D) and (H).
136
F
H
G
deflects each belt
D
F
H
G
(continued next page)
Revision D
E
(E)
E