SECTION 00 -- GENERAL INFORMATION -- CHAPTER 2
00-3
During field operation, the tractor hydraulic valve
should remain in the “Float” position, to allow the cut-
ter bar to follow the ground contours. Raise the cutter
bar to clear obstacles or when turning on headlands
by retracting the lift cylinder. Do not raise the cutter
bar using the three point hitch; if the tractor hydraulic
valve is in “Float” position, the right end of the cutter
bar will stay on the ground as the three point hitch is
raised, causing the end of the cutter bar to gouge into
the ground.
NOTE: Do not raise the cutter bar using the three
point hitch, as this may cause PTO u-jolnt failure and/
or damage to the cutter bar.
When making left turns in the field, the cutter bar
should be raised off the ground to prevent damage
due to “whipping” the cutter bar around at high
speed; leaving the cutter bar on the ground during a
fast left turn could cause damage to the cutter bar
components and/or cause the breakaway latch to
trip. If it is necessary to make a sharp left turn while
cutting, reduce ground speed.
The disc mower ground speed capabilities are vari-
able, depending on field terrain and crop conditions.
Generally, 4 MPH - 6 MPH (6.4 km/hr- 9.6 km/hr)
yields good results. Slower speeds may be neces-
sary depending on crop conditions, tractor horse-
power, and terrain. In light, easy to cut crops and
smooth fields, higher speeds are possible.
NOTE: Adjust the tractor ground speed by changing
gears. Do not adjust ground speeds by moving the
tractor throttle from the proper PTO speed. Do not
overspeed the PTO or driveling damage may occur.
If the machine vibrates, STOP OPERATION IM-
MEDIATELY. Determine and correct the cause of the
vibration before continuing operation. FAILURE TO
DO THIS WILL CAUSE SERIOUS DAMAGE TO
THE UNIT.
DANGER
Do not attempt to remove material from the disc
mower w hile it is in operation. Shut the t ractor off
and allow the rotating discs to stop before leav-
ing the tractor.
CAUTION
Do not operate the disc mower without the cutter
bar curtain in place and in good condition.
The disc mowers are intended for use in difficult cut-
ting conditions. The knife speed is approximately 185
MPH (298 km/hr) and relies on plant stem integrity
and strength to cut. The cutter bar operates on an im-
pact cutting principle.
The high centrifugal force of the knife could permit
crop blowdown in light or thin crops, resulting in uncut
strips, or streaks. In light or thin crops, cutting a short-
er stubble will sometimes reduce streaking. Do not tilt
the cutter bar for a shorter stubble in stony fields.
NOTE: Take extra precautions to prevent accumula-
tion of baler twine or wire in fields to be cut with the
disc mowers. Twine and wire may wrap beneath the
discs and overheat the disc bearings and/or damage
shaft seals causing oil loss and possible module fail-
ure.
The cutter bar may plug with dirt and debris between
the stone guards when operating in newly planted
fields with soft loose soil. This plugging may cause
streaking to occur. Tilt the cutter bar back towards
horizontal to increase the cutting height, and lighten
cutter bar flotation to reduce plugging in these condi-
tions. Clean the cutter bar off frequently to avoid un-
necessary knife and disc wear. In severe conditions,
install the high stubble kit to increase the cutting
height.
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