MacDon A30-D, Operator'S Manual

Page: 134 / 182

SECTION 7 MAINTENANCE AND SERVICING
169000
132
Revision F
7.8.10.5 Removing RH Knife Drive Belt - A40-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. Loosen three nuts (B), and jam nut on adjuster
bolt (C).
b. Turn adjuster bolt (C) so that knife drive belt (A)
can be slipped off pulley (J).
c. Remove bolt-in plate in LH endsheet at knife
drive box.
d. Slip belt off knife drive box pulley, and route belt
through this hole to remove it.
7.8.10.6 Installing RH Knife Drive Belt -
A40-D
a. Route knife drive belt (A) through opening in
endsheet onto knife drive box pulley and knife
drive pulley (J) as shown.
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.
b. Turn adjuster bolt (C) 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.
c. Tighten jam nut at (C), and three nuts (B).
d. Install bolt-in plate in LH endsheet at knife drive
box, and close endshield.
e. Readjust tension of a new belt after a short
run-in period (about 5 hours).
J
C
A
B
J
C
A
B