2header float, Float operating guidelines, Checking float – MacDon M155 Operators Manual User Manual
Page 155: Header float, Float operating guidelines checking float, 2 header float
4.4.2
Header Float
Float is intended for cutting crops that require the cutterbar to be in contact with the ground. Optimum float 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 float should be set as light as possible without causing excessive
bouncing.
• When float 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 float the
header. Refer to your header operator’s manual for float 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
.
2. In rocky fields, adjust skid shoes down to raise guards when operating at flattest 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 147
.
2. The proper setting requires balancing the amount of header weight carried by the float 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 150
.
Checking Float
M-Series windrowers are equipped with primary (coarse) and secondary (fine) float adjustment systems. The primary
or coarse adjustment uses drawbolts to change the tension on the springs in the lift linkages. The secondary or fine
adjustment uses hydraulic cylinders to change the spring tension.
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