MacDon A40-D - Manual (Page 138)

SECTION 7 MAINTENANCE AND SERVICING
169000 / 169040
136
Revision E
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 sickle drive belt (A)
can be slipped off pulley (D).
e. Remove bolt-in plate in LH endsheet at sickle
drive box.
f. Slip belt off sickle drive box pulley, and route
belt through this hole to remove it.
7.8.11.3 Installation: LH Sickle 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 sickle drive belt (A) through opening in
endsheet onto sickle drive box pulley and sickle
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. Re-connect hoses onto hydraulic motor (J).
e. Re-adjust 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