MacDon A40-D - Manual (Page 136)

SECTION 7 MAINTENANCE AND SERVICING
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134
Revision E
7.8.10.6 Installation: RH Sickle Drive Timing
Belt - 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).
NOTE
When installing new belt, never pry belt
over pulley. Be sure adjusting screw is
fully loosened, then tension belt.
b. 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).
c. Tighten jam nut at (C), and three nuts (B).
d. Position V-belts (E) on pulleys.
e. Turn adjuster bolt (F) to move pulley (G) so that
each belt (E) deflects 3/16 in. (4 mm) when a
load of 8–12 lbf (35–40 N) is applied to each belt
at mid-span.
f. Tighten jam nut on adjuster bolt (F), and nuts
(H).
g. Install bolt-in plate in RH endsheet at sickle drive
box.
h. Close endshield.
i. Re-adjust tension of a new belt after a short
run-in period (about 5 hours).
H
E
G
F
A
B
C
D
E