MacDon A40-D Pull-Type - Manual (Page 126)

SECTION 7 MAINTENANCE AND SERVICING
169000
124
Revision F
7.8.9 Knife Drive Belts: A30-D
7.8.9.1 Adjusting Tension: LH Knife Drive
Timing Belt - A30-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 LH endshield.
b. Loosen three nuts (B).
c. Loosen jam nut on adjuster bolt (C).
d. 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.
e. Tighten jam nut at (C), and three nuts (B).
f. Close endshield.
g. Readjust tension of a new belt after a short
run-in period (about 5 hours).
7.8.9.2 Removing LH Knife Drive Belts: A30-D
a. Open LH endshield.
b. Loosen nut (E) on idler sprocket.
c. Turn adjuster bolt (F) to loosen chain so that it
can be removed from large sprocket (G).
d. Loosen nuts (H), and jam nut on adjuster
bolt (J).
e. Turn adjuster bolt (J) to loosen V-belts (K) so
that belts can be slipped off pulley (D).
(continued next page)
K
D
H
J
B
C
A
D
A
E
F
G