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ADJUSTMENTS
The center adjustments are set at 2 7/8" to square up the center roller.
The outer adjustment starts at 2 7/8", then it is moved to adjust belt tracking. If the belt is tracking
rearward, the roller needs to be adjusted out. If the belt is tracking forward, the roller needs to be
moved in.
It is easier to adjust one belt at a time with the opposite head in the transport position. When a belt is
tracking properly, the center groove will ride in the notch in the roller and the belt will have an audible
hum/buzz to it. Be sure to run the belt in both directions to ensure proper tracking.
The following procedure is to ensure that the belt is tracking properly and stays centered on the roller.
MAKE SURE EVERYONE STAYS WELL CLEAR OF THE MACHINE WHEN PERFORMING THIS
PROCEDURE.
Ensure that the oil is warmed up and the PTO is running at 1000 RPM. With the belt running, lift the
head up until the deflector goes down. This will cause the belt to ride toward the back of the head.
Only allow the belt to run like this for a minimal time to ensure that major damage does not occur to
the belt edge. Then, lower the head back to the ground. In minimal time (30 seconds or less), the belt
should track back to the center of the roller. If this cannot be accomplished, further belt adjustments
need to be made.
If the belt tracks significantly different when the belt direction is changed, it is likely that the set
screws on one or both of the rollers are not holding properly. Split the belt and locate the 2 set screws
as show in Figure 42. Remove the set screw. With the roller and spacer tight to the locking collar, en-
sure that the shaft is dimpled in the location where the set screw is tightened. Reinstall the set screws
with locking compound.
2-7/8"
-30-
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