MacDon A40-D Pull-Type - Manual (Page 141)

SECTION 7 MAINTENANCE AND SERVICING
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139
Revision F
7.9.2 Reel Drive Belts: A30-D
7.9.2.1 Adjusting Tension
IMPORTANT
To prolong drive life, do NOT over-tighten
belts. Belt slippage is used to protect the
reel in an overload situation.
Adjust reel 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 shield on header RH side.
b. Loosen jam nut on adjuster bolt (B), and
nuts (C).
c. Turn adjuster bolt (B) to move pulley (D) so that
each belt (A) deflects 3/16 in. (4 mm) when a
load of 8–12 lbf (35–40 N) is applied to each belt
at mid-span.
d. Tighten jam nut on adjuster bolt (B), and
nuts (C).
NOTE
Readjust tension of new belts after
about 5 hours of operation.
e. Check reel drive chain tension, and adjust if
necessary. See Section 7.9.1 Reel Drive Chain:
A30-D.
f. Close shield before engaging header.
7.9.2.2 Removing
Remove reel drive belts (A) as follows:
a. Open shield on header RH side.
b. Loosen jam nut on adjuster bolt (B) and nuts (C)
at reel drive arm.
c. Turn adjuster bolt (B) to loosen reel drive belts.
d. Remove drive belts (A).
7.9.2.3 Installing
IMPORTANT
Reel drive belts are a matched set.
Replace BOTH drive belts even if only
one needs replacing.
Install reel drive belts (A) as follows:
a. Position drive belts (A) on pulleys, ensuring both
belts are identical.
b. Turn adjuster bolt (B) to move pulley (D) so that
each belt (D) deflects 3/16 in. (4 mm) when a
load of 8–12 lbf (35–40 N) is applied to each belt
at mid-span.
c. Tighten jam nut on adjuster bolt (B), and
nuts (C).
NOTE
Readjust tension of new belts after
about 5 hours of operation.
d. Check reel drive chain tension, and adjust if
necessary. See Section 7.9.1 Reel Drive Chain:
A30-D.
e. Close shield before engaging header.
C
A
D
B
C
A
D
B