MacDon CA25 OM - Manual (Page 71)

SECTION 7. OPERATION
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Revision B
7.9.3 Header Angle
Header angle is the angle between the drapers
and the ground, and is adjustable to
accommodate crop conditions and/or soil type.
Guard angle is similar to header angle which is
the angle between the guard upper surface and
the ground. Refer to illustration above.
Flatter header angles are recommended for
normal crop conditions and for stony ground
because it minimizes sickle section breakage
and reduces soil scooping or build-up at the
cutterbar in wet conditions.
Steeper angles are recommended in downed
crops for better lifting action, or for cutting close
to the ground in soybeans for example.
Refer to Section 7.8.1 Header Settings for
recommended header angle in specific crops
and crop conditions.
The following table summarizes the adjustment
range:
HEADER SIZE
(FT)
DRAPER
ANGLE
GUARD
ANGLE
20 and 25 ft. 13.0°–18.4° 7.0° – 12.4°
30, 35, 40
and 45 ft.
13.0°–18.4° 2.0°–7.4°
7.9.3.1 Angle Adjustment
The header angle is varied by adjusting the
length of the center-link between the combine
adapter and the header.
Refer to your Combine Operator’s Manual for
adjusting the header angle.
SHORTEST CENTER-LINK
HEADER ANGLE GUARD ANGLE
GUARD ANGLE HEADER ANGLE
LONGEST CENTER-LINK