MacDon 3020 Pull-Type Windrower - Manual (Page 65)

54
MAINTENANCE/SERVICE
SICKLE AND SICKLE DRIVE (continued)
Sickle Drive Belt Tension
IMPORTANT: To prolong belt and drive life, do not
over-tighten belt. Operate at minimum tension
required to prevent slipping and excessive
vibration.
To adjust:
1.
WARNING: To avoid injury or death
from fall of raised header, engage
header lock before going under
machine.
2. Loosen five hex nuts (A) under crank pulley.
3. Loosen locknut (B) on adjuster bolt (C).
4. Turn bolt (C) to adjust tension.
5. At correct tension, tighten locknut (B) to secure
the position.
6. Tighten hardware (A) to 85 ft.lbs. (115 N
⋅m).
7. Disengage header lock and lower header to
cutting height.
8. Check belt tension and position loop bracket
(D) so belt passes through center of loops.
SICKLE DRIVE BELT TENSION ADJUST.
A
B
C
CENTER BELT THROUGH LOOPS
D