MacDon A40-D Pull-Type - Manual (Page 129)

SECTION 7 MAINTENANCE AND SERVICING
169000
127
Revision F
7.8.9.4 Adjusting Tension: RH 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 RH endshield.
b. Loosen three nuts (B), and jam nut on adjuster
bolt (C).
c. 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).
d. Tighten jam nut at (C), and three nuts (B).
e. Close endshield.
f. Readjust tension of a new belt after a short
run-in period (about 5 hours).
7.8.9.5 Removing RH Knife Drive Timing Belt:
A30-D
a. Open shield on header RH side.
b. Loosen jam nut on adjuster bolt (E), and
nuts (F).
c. Turn adjuster bolt (E) to loosen reel drive
V-belts (G), and remove belts from pulley (H).
d. Loosen three nuts (B), and jam nut on adjuster
bolt (C).
e. Turn adjuster bolt (C) so that knife drive belt (A)
can be slipped off pulley (D).
f. Remove bolt-in plate in LH endsheet at knife
drive box.
g. Slip belt off knife drive box pulley, and route belt
through this hole to remove it.
A
B
C
D
F
G
H
E
A