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Adjusting Knife Drive Box Fore-Aft
Perform this procedure if there is contact between the guard and the knife bar, or if adjustments have been
made to the alignment tab.
1. Identify the location of the contact between the guard and the knife bar to determine which direction to move the
knife drive box.
NOTE:
The procedure is the same for both ends of a timed
double-knife header. Images shown are for the left
end—the right end is opposite.
2. Shut down the windrower, and remove the key from
the ignition.
3. Open the endshield. Refer to
.
4. Loosen the two nuts (A) enough to allow the idler
pulleys (B) to pivot.
Figure 5.63: Timed Double-Knife Drive
5. Loosen the jam nut (C).
6. Turn
fl
ange nut (A) counterclockwise on adjuster
bolt (B) to relieve knife drive belt tension.
Figure 5.64: Timed Double-Knife Drive
7. Loosen four bolts (A) securing the knife drive box to
the mount.
8. Loosen bolt (C) securing the knife drive box
locating tab (B).
Figure 5.65: Knife Drive Box
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Revision A