MacDon A40-D - Manual (Page 131)

SECTION 7 MAINTENANCE AND SERVICING
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Revision E
7.8.9.3 Installation: A30-S Sickle Drive Belt
a. Route sickle drive belt (A) through opening in
endsheet onto sickle drive box pulley and sickle
drive pulley (E) as shown.
NOTE
When installing new belt, never pry belt
over pulley. Be sure idler is fully
loosened, then tension belt.
b. Turn adjuster bolt (C) to move idler until a force
of 20 lbf (80 N) deflects belt (A) 1/4 in. (6 mm) at
mid-span.
c. Tighten idler bolt (B).
d. Position belts (F) on pulley (G) as shown.
e. Turn adjuster bolt (H) so that each belt deflects
3/16 in. (4 mm) at mid-span when a load of
8–12 lbf (35–40 N) is applied to each belt.
f. Tighten bolts (J) and jam nut on (H).
g. Install bolt-in plate in LH endsheet at sickle drive
box, and close endshield.
h. Re-adjust tension of a new belt after a short
run-in period (about 5 hours).
C
B
E
A
G
F
H
J