MacDon M105, Operator'S Manual

Page: 133 / 384

OPERATION
4.4.2 Header Float
Float is intended for cutting crops that require the cutterbar to be in contact with the ground. Optimum fl oat is
for the cutterbar to maintain contact with the ground with minimum bouncing and scooping or pushing soil. The
machine will perform best with minimum extra weight on the header.
IMPORTANT:
• To avoid frequent breakage of knife components, scooping soil, or soil build-up at cutterbar in wet conditions,
header fl oat should be set as light as possible without causing excessive bouncing.
• When fl oat setting is light, it may be necessary to use a slower ground speed to avoid excessive bouncing and
leaving a ragged cut.
• The stabilizer wheels are designed to minimize bouncing at the header ends and
NOT
fl oat the header. Refer
to your header operator’s manual for fl oat setting and adjustment guidelines.
Float Operating Guidelines
When working with the cutterbar on the ground:
1. Set center-link to mid-range position (05.0 on cab display module [CDM]). Refer to
4.4.5 Adjusting Header Angle,
page 124
.
2. In rocky fi elds, adjust skid shoes down to raise guards when operating at fl attest header angle to minimize
scooping rocks.
3. Adjust header height or adjust header angle to minimize pushing soil.
When working with the cutterbar off the ground (draper header only):
1. Set center-link to mid-range position (05.0 on CDM). Refer to
4.4.5 Adjusting Header Angle, page 124
.
2. The proper setting requires balancing the amount of header weight carried by the fl oat and stabilizer wheels.
Refer to your draper header operator’s manual.
3. Use the CDM controls to automatically maintain cutting height. Refer to
4.4.6 Cutting Height, page 127
.
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