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271
Revision A
8.9
Checking and Adjusting Header Float
The header is equipped with a suspension system that floats the header over the ground to compensate for ridges,
trenches, and other variations in ground contour. If the header float is not set properly, it may cause the cutterbar to push
into the ground or leave uncut crop. This procedure describes how to check header float and adjust to the factory-
recommended settings.
WARNING
To avoid injury or death from unexpected start-up of machine, always stop the engine and remove the key from the
ignition before leaving the operator
’
s seat for any reason.
Use the following guidelines when adjusting float:
•
Turn each adjustment bolt pair equally. Repeat torque wrench reading procedure on both sides of header.
•
Set the header float as light as possible without causing excessive bouncing to prevent knife component breakage, soil
scooping, and soil build-up at the cutterbar in wet conditions.
•
To avoid excessive bouncing and leaving a ragged cut, use a slower ground speed with a light float setting, if necessary.
•
When cutting off the ground, use the stabilizer wheels in conjunction with header float to minimize bouncing at the
header ends and to control cut height.
NOTE:
If adequate header float cannot be achieved using all of the available adjustments, an optional heavy-duty spring is
available.
To check and adjust header float, follow these steps:
1.
Park the combine on a level surface.
1024382
A
Figure 8.20: Center-Link
2.
Level the header and float module. If the header and float
module are not level, perform the following checks before
adjusting the float:
IMPORTANT:
Do
NOT
use the float module springs to level the header.
•
Check that the combine feeder house is level.
•
Check that the top of the float module is level with the
combine axle.
•
Ensure the combine tires are inflated equally.
3.
Adjust header so that the cutterbar is 150
–
254 mm
(6
–
10 in.) off the ground.
4.
Extend the header angle hydraulic cylinder to between
B
and
C
on indicator (A).
