MacDon A40-D - Manual (Page 157)

SECTION 7 MAINTENANCE AND SERVICING
169000 / 169040
155
Revision E
7.11.3 Auger Drive Belt: A30-S
7.11.3.1 Tension
IMPORTANT
To prolong drive life, do not over-tighten
belts. Belt slippage is used to protect the
auger in an overload situation.
NOTE
Minor belt tension adjustments may be
made without affecting chain tension.
For major adjustments, like after re-
positioning reel or auger, adjust chain
tension before belt tension.
Adjust auger drive belts (A) tension as follows:
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 bolts (B).
c. Loosen jam nut on adjuster bolt (C).
d. Turn adjuster bolt (C) so that each belt deflects
3/16 in. (4 mm) at mid-span when a load of
8–12 lbf (35–40 N) is applied to each belt.
e. Tighten bolts (B).
f. Tighten jam nut at (C).
g. Close shield before engaging header.
7.11.3.2 Removal
a. Open LH endshield.
b. Remove chain (D) from small sprocket as
follows:
1. Loosen three bolts (B).
2. Loosen jam nut on adjuster bolt (E), and turn
adjuster bolt (E) to loosen chain (D).
3. Remove chain from small sprocket.
c. Loosen jam nut on adjuster bolt (C).
d. Turn adjuster bolt (C) to loosen auger drive belts
(A).
e. Remove belts (A).
7.11.3.3 Installation
IMPORTANT
Auger drive belts are a matched set.
Replace both drive belts even if only one
needs replacing.
a. Position auger drive belts (A) as shown.
b. Install auger drive chain (D) as follows:
1. Locate chain (D) onto small sprocket.
2. Turn adjuster bolt (E) to tighten chain.
Deflection at (D) should be 1/4 in. (6 mm).
3. Tighten jam nut on adjuster bolt (E)
c. Turn adjuster bolt (C) so that each belt deflects
3/16 in. (4 mm) at mid-span when a load of
8–12 lbf (35–40 N) is applied to each belt.
d. Tighten jam nut on adjuster bolt (C), and the
three bolts (B).
NOTE
Re-adjust tension of a new belt after
about 5 hours of operation.
e. Close endshield.
C
B
A
E
B
A
D
C