MacDon FD75, Operator'S Manual

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58
Revision B
1001655
A
Figure 3.31: Spring Compression
7. Position the header at the desired working angle. If the
header angle is not critical, set it to mid-position.
IMPORTANT:
Continuously operating the stabilizer wheel while the spring
is highly compressed can result in permanent damage to
the stabilizer wheel suspension system. The spring is
considered to be highly compressed when the load
indicator shows a reading greater than 4 or when
compressed length (A) is less than 295 mm [11 5/8 in.]).
Cutting on Ground
Cutting on the ground is performed with the header fully lowered and the cutterbar on the ground. The orientation of the
knife and knife guards relative to the ground (header angle) is determined by the skid shoes and the center-link
—
it is NOT
determined by the header lift cylinders. The skid shoes and center-link allow you to adjust to field conditions and maximize
the amount of material cut while reducing damage to the knife caused by stones and debris.
The header float system floats the header over the surface to compensate for ridges, trenches, and other variations in
ground contour to prevent the cutterbar from pushing into the ground or leaving uncut crop.
Refer to the following for additional information about the adjustments used to optimize cutting on the ground:
•
Adjusting Inner Skid Shoes, page 58
•
Adjusting Outer Skid Shoes, page 59
•
3.7.2 Header Float, page 60
•
3.7.4 Header Angle, page 78
•
3.6.2 Header Settings, page 43
Adjusting Inner Skid Shoes
Skid shoes are used to determine stubble height when cutting on the ground.
DANGER
To prevent bodily injury or death from the unexpected start-up or fall of a raised machine, always stop the engine,
remove the key, and engage the safety props before going under the header for any reason.
1. Raise the header fully.
2. Shut down the engine, and remove the key from the ignition.
3. Engage the header safety props.
4. Raise the stabilizer wheels or slow speed transport wheels fully (if installed). For instructions, refer to the relevant
topic:
•
Adjusting Stabilizer Wheels, page 57
•
Adjusting Stabilizer/Slow Speed Transport Wheels, page 54
OPERATION