MacDon A40-D - Manual (Page 134)

SECTION 7 MAINTENANCE AND SERVICING
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132
Revision E
7.8.10.3 Installation: LH Sickle Drive Belts:
A30-D
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. Route sickle drive belt (A) through opening in
endsheet onto sickle drive box pulley and sickle
drive pulley (D) as shown.
NOTE
When installing new belt, never pry belt
over pulley. Be sure idler is fully
loosened, then tension belt.
IMPORTANT
To prolong belt and drive life, do not over-
tighten belts.
b. Turn adjuster bolt (C) to move pulley (D) until a
force of 5–6.5 lbf (22–30 N) deflects belt (A)
0.55 in. (14 mm) at mid-span.
c. Tighten jam nut at (C), and three nuts (B).
d. Re-position V-belts (K) on pulley (D)
e. Turn adjuster bolt (J) to move drive pulley until a
force of 8–12 lbf (35–50 N) applied at mid-span
on each belt (K) deflects each belt 0.16 in.
(4 mm).
f. Tighten jam nut at (J), and three nuts (H).
g. Re-position chain on large sprocket (G).
h. Turn adjuster bolt (F) to tighten chain to give
0.2 in. (5 mm) slack at mid-span. Tighten nut
(E) on idler sprocket.
i. Rotate auger and check chain for slack at
tightest point. Re-adjust position of idler
sprocket to achieve required slack.
j. Install bolt-in plate in LH endsheet at sickle drive
box, and close endshield.
k. Re-adjust tension of a new belt after a short
run-in period (about 5 hours).
E
F
B
C
A
D
K D
H
J
G