MacDon A40-D Pull-Type - Manual (Page 132)

SECTION 7 MAINTENANCE AND SERVICING
169000
130
Revision F
Timing Belt
a. Remove double V-belts as per previous page.
b. Disconnect hoses from auger drive motor (J).
Protect hose ends and motor ports with clean,
lint-free cloths or clean plastic bags.
c. Loosen three nuts (B), and jam nut on adjuster
bolt (C).
d. Turn adjuster bolt (C) so that knife drive belt (A)
can be slipped off pulley (D).
e. Remove bolt-in plate in LH endsheet at knife
drive box.
f. Slip belt off knife drive box pulley, and route belt
through this hole to remove it.
7.8.10.3 Installing LH Knife Drive Timing Belts -
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.
Timing Belt
a. Route knife drive belt (A) through opening in
endsheet onto knife drive box pulley and knife
drive pulley (D) 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 (D) 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. Reconnect hoses onto hydraulic motor (J).
e. Readjust tension of a new belt after a short
run-in period (about 5 hours).
(continued next page)
C
D
A
B
J
C
D
A
B
J