HEADER OPERATION – A SERIES
Form 169304
87
Model Year - 2009
6.6.4
Knife Speed
The ideal cutting speed of the knife should be
such that a clean cut is achieved. Crop types
and conditions usually influence the knife and
forward speeds.
The knife speed is manually set by making
adjustments to the knife drive pump and has
been pre-set at the factory at approximately the
mid-point (15 gpm (57 L/min)). Set the knife
speed according to the header being used. See
the following table.
HEADER DESCRIPTION
KNIFE SPEED *
(Strokes Per Minute [SPM])
TYPE
SIZE
MINIMUM
MAXIMUM
Auger A40
All
1400
1950
Auger A30
All
1450 Fixed
If the machine is equipped with the appropriate
sensor, the CDM will notify the operator when
the knife speed reaches an overload pre-set
(usually 75% of knife speed). The pre-set can
be changed on the CDM. Refer to Section
5.18.5 CDM Programming.
NOTE
The knife speed cannot be programmed
outside the range specified for each
header.
NOTE
The speed can be adjusted without
shutting down the machine, although it is
recommended that the windrower be
stopped to enable the operator to re-
program the WCM.
Use the following procedure to set the knife
speed. See chart on next page for settings:
CAUTION
Check to be sure all bystanders have cleared
the area.
a. Run engine at 2600 rpm with the header drive
engaged.
b. Check knife speed at the wobble box pulley with
a hand-held tachometer. If required, adjust knife
speed as follows:
DANGER
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.
1. Shutdown engine.
2. Loosen jam-nut (A).
3. One revolution clockwise of adjuster screw
(B) will decrease flow by approx 1 gpm.
4. One revolution counter clockwise will
decrease flow by approx 1 gpm.
5. Once adjustment has been made retorque
jam nut (A) as shown.
c. Start engine and recheck knife speed.
(continued next page)
A
B