MacDon FD70 for Combine Operators - Manual (Page 96)

SECTION 9. OPERATION
Form 169006
94
Revision D
h. To increase float (lighten the header), tighten
bolts (A) and (B) at both sides of adapter.
i. To decrease float (increase header weight),
loosen the bolts (A) and (B).
IMPORTANT
Turn each bolt pair equal amounts.
After adjustment has been made, refer
to Section 9.11.3.2 Checking and
Adjusting Float.
IMPORTANT
Proper float adjustment in accordance
with the above is critical to maintain
proper wing balance when cutting on
the ground.
IMPORTANT
To avoid frequent breakage of sickle
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.
IMPORTANT
The stabilizer wheels may be used in
conjunction with main float to minimize
bouncing at the header ends and
control cut height when cutting off the
ground. Refer to Section 9.11.2 Cutting
Height for details.
NOTE
If adequate header float cannot be
achieved using all of the available
adjustments, an optional heavy duty
spring is available. It includes an inner
spring. See your MacDon Dealer or
Parts Catalog for ordering information.
9.11.3.3 Setting Feeder House Height and
Header Angle
a. Adjust feeder house height while watching float
indicator (X) to set cutterbar down force (normally
2 on indicator). Lower feeder house height to
increase ground pressure (decrease float).
Indicator reading will increase.
NOTE
Installation of the auto header height
controller attachment is recommended
for cutting on the ground if the combine
is equipped to interface with it.
b. When cutting on ground, adjust header angle to
achieve desired stubble height. AHHC (Y)
indicates A for shallowest angle/higher stubble,
and D for steepest angle/lower stubble.
c. In rocky fields, adjust skid shoes down to raise
guards when operating at flattest header angle to
minimize scooping rocks.
d. Increase header height or decrease header angle
to minimize pushing soil.
NOTE
Header angle and reel fore-aft position
changes do not significantly affect
header float (down force).
X Y
A
LEFT SIDE FLOAT
B
RIGHT SIDE FLOAT