MacDon FD75 OM - Manual (Page 67)

OPERATION
12. Lower header to desired cutting height using combine
controls and check load indicator. As an example
the image shows that the wheels are set to a range
between ‘2’ and ‘3’ on load indicator.
Figure 4.26: Load Indicator
IMPORTANT:
Continuous operation with excessive spring
compression (i.e., load Indicator reading greater
than ‘4’ or a compressed length (A) less than
11–5/8 in. [295 mm]) can result in damage to
suspension system.
13. Adjust header angle to desired working angle with the
machine’s header angle controls. If angle is not critical,
set it to mid-position.
14. Use the combine’s Auto Header Height Control
(AHHC) to automatically maintain cutting height. Refer
to
4.7.2 Auto Header Height Control, page 56 and your
combine operator’s manual for details.
NOTE:
The height sensor on the CA25 adapter must be
connected to the combine header control module
in the cab.
Figure 4.27: Spring Compression
Adjusting Stabilizer Wheels
The proper setting requires balancing the amount of header weight carried by the float and the stabilizer wheels.
Refer to 4.6.2 Header Settings, page 47 for recommended
use in specific crops and crop conditions.
1. Raise the header so that the stabilizer wheels are off
the ground. Shut down engine and remove the key.
CAUTION
Handle may be under tension, especially when
the wheels are on the ground.
Raise header so
that wheels are off the ground before making
adjustments.
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