1. Shut down the windrower, and remove the key from
the ignition.
2. Use a feeler gauge to measure the clearance between
the stub guard hold-down (A) and the knife section.
Ensure the clearance is between the following
measurements:
•
At guide tip (B):
0.1–0.4 mm (0.004–0.016 in.)
•
At rear of guide (C):
0.1–1.0 mm (0.004–0.040 in.)
3. Adjust the clearance as follows:
a. Tighten nuts (D) until they are
fi
nger tight.
b. To lower the front of the hold-down and decrease
clearance, turn the three adjuster bolts (E)
clockwise; to raise the front of the hold-down and
increase clearance, turn the adjuster bolts (E)
counterclockwise.
c. Torque the nuts (D) to 72 N·m (53 ft·lbf) after all
the adjustments are complete and the speci
fi
ed
clearances are achieved.
Figure 5.40: Stub Guards
WARNING
Check to be sure all bystanders have cleared the area.
4. Complete the hold-down adjustments, run the header
at low engine speed, and listen for noise caused by
insuf
fi
cient clearance.
NOTE:
Insuf
fi
cient hold-down clearance will result in
overheating of the knife and guards—readjust
as necessary.
5.5.8
Knifehead Shield
The knifehead shield attaches to the endsheet and reduces the knifehead opening to prevent cut crop from
accumulating in the knifehead cut-out.
The shields and mounting hardware are available from your MacDon Dealer.
IMPORTANT:
Remove the shields when cutting with the cutterbar on the ground in muddy conditions. Mud may pack into the
cavity behind the shield which could result in knife drive box failure.
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Revision A