MacDon A40-D Pull-Type - Manual (Page 133)

SECTION 7 MAINTENANCE AND SERVICING
169000
131
Revision F
Double V-Belts
IMPORTANT
Belts are a matched set. Replace BOTH
drive belts even if only one
needs replacing.
NOTE
When installing new belt, NEVER pry
belt over pulley. Be sure adjusting screw
is fully loosened, then tension belt.
IMPORTANT
To prolong belt and drive life, do NOT
over-tighten belts.
a. Slip belts (E) onto pulleys (H) and (D).
b. Turn adjuster bolt (G) to move pulley (H) until a
force of 8–12 lbf (35–50 N) applied at mid-span
to each belt deflects each belt (E)
0.16 in. (4 mm).
c. Tighten jam nut at (G), and three nuts (F).
d. Readjust tension of a new belt after a short
run-in period (about 5 hours).
7.8.10.4 Adjusting Tension: RH Knife Drive Belt
- A40-D
IMPORTANT
To prolong belt and drive life, do NOT
over-tighten belts.
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 RH endshield.
b. Loosen three nuts (B), and jam nut on adjuster
bolt (C).
c. Turn adjuster bolt (B) to move pulley (J) until a
force of 5–6.5 lbf (22–30 N) deflects belt (A)
0.55 in. (14 mm) at mid-span.
d. Tighten jam nut at (C), and three nuts (B).
e. Readjust tension of a new belt after a short
run-in period (about 5 hours).
E
H
G
F
D
J
C
A
B