MacDon CA25 OM - Manual (Page 65)

SECTION 7. OPERATION
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Revision B
7.9 HEADER OPERATING VARIABLES
Satisfactory function of the header in all
situations requires making proper adjustments
to suit various crops and conditions.
Correct operation reduces crop loss and allows
cutting of more acres. As well, proper
adjustments and timely maintenance will
increase the length of service you receive from
the machine.
The variables listed below and detailed on the
following pages will affect the performance of
the machine. You will quickly become adept at
adjusting the machine to give you the desired
results.
VARIABLE SECTION
Cutting Height 7.9.1
Header Float 7.9.2
Header Angle 7.9.3
Reel Speed 7.9.4
Ground Speed 7.9.5
Draper Speed 7.9.6
Knife Speed 7.9.7
Reel Height 7.9.8
Reel Fore-Aft Position 7.9.9
Reel Tine Pitch 7.9.10
Crop Divider Rods 7.9.11
7.9.1 Cutting Height
Harvest Headers are designed to allow an
Operator to cut the crop above the ground for a
desired stubble height, or to cut the crop at
ground level with the header on the ground.
Cutting height will vary, depending on factors
including whether windrowing or straight-
cutting, type of crop, etc.
7.9.1.1 Cutting Off The Ground
Cutting height is controlled with a combination
of header lift cylinder adjustment and a
stabilizer wheel system, or a stabilizer/slow
speed transport wheel system.
The stabilizing wheel system in both options is
designed to minimize bouncing at the header
ends, and may be used to float the headers to
achieve an even cutting height when cutting
above ground level in cereal grains.
The system can provide very even stubble
height and greatly reduced operator fatigue.
The proper setting requires ‘balancing’ the
amount of header weight carried by the float
and the stabilizer wheels.
Refer to Section 7.8.1 Header Settings for
recommended use in specific crops and crop
conditions.
CAUTION
Stop engine, and remove key from ignition
before leaving Operator's seat for any
reason. A child or even a pet could engage
an idling machine.
a. Raise the header so that the stabilizer wheels
are off the ground. Shut down engine, and
remove the key.
b. Check that the float is working properly. See
Section 7.9.2 Header Float.
c. Set up the stabilizer wheels, if installed, as
follows: Otherwise, proceed to step d. on next
page.
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.
1. Support wheel weight by lifting slightly with
one hand on handle B. Pull up on handle
(A) to release lock.
2. Lift wheel with handle (B) and engage
support channel into center slot (C) in
upper support.
3. Push down on handle (A) to lock.
(continued next page)
LH SHOWN - RH OPPOSITE
A
C
B