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Revision B
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Figure 5.102: Knife Drive
–
Right Side
10. Tighten hex nuts (A) on idler pulleys (B).
11. To check for correct knife timing, rotate the drive slowly by
hand, and observe where the knives overlap at the center
of the header.
IMPORTANT:
The knives must begin moving at the exact same time, and
must move in opposite directions.
12. If necessary, adjust the knife timing by loosening the drive
belt just enough to reposition pulley (C) to the next cog(s),
and proceed as follows:
a.
If the right knife leads the left knife, rotate right driven
pulley (C) clockwise.
b.
If the right knife lags the left knife, rotate right driven
pulley (C) counterclockwise.
13. Ensure the drive pulleys don
’
t rotate, and tension the right-side drive belts (refer to Step
to Step
IMPORTANT:
Do
NOT
use the adjuster bolt at the drive pulley to adjust the timing belt tension.
14. Recheck the timing (refer to Step
) and readjust if necessary (refer to Step
15. Close both endshields. For instructions, refer to
.
Adjusting Tracking for Timed Double-Knife Belt
Proper belt tracking with ensure longer belt life. Belts that are not tracking properly are subject to premature failure;
ensure the pulleys are aligned and parallel.
Two people are required for this procedure
—
one to operate the windrower and header, and the other to observe and
adjust the belt tracking.
IMPORTANT:
Cogged timing belts should be centered on the knife drive box pulley and positioned at least 2 mm (3/32 in.) from either
edge of the pulley when the header is running (a gap should be visible between the belt and the edge of the pulley).
NOTE:
The belt should not make continuous contact with the flanges of the drive pulley, but occasional contact is acceptable.
DANGER
To prevent injury or death from the unexpected start-up of the machine, always stop the engine and remove the key
from the ignition before leaving the operator
’
s seat for any reason.
1.
Shut down the windrower engine and remove the key from the ignition.
2.
Open both endshields. For instructions, refer to
.
CAUTION
Exercise extreme care when operating the header with the endshields open.
3.
Operate the header. Observe the belt tracking on both the drive pulley and the knife drive box pulley on both sides of
the header.
4.
Shut down the engine, and remove the key from the ignition.
