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18 Operation
MAN0390 (Rev. 6/30/2006)
ment on pull-type units and DS120 mounted units.
DS96 requires manual adjustment using holes in the
tailwheel arms.
When selecting a cutting height, you should consider
the area of operation. If the ground is rolling and has
mounds the blades could contact, set the cutting height
accordingly.
NOTICE
■ Avoid ground contact with blades. Striking
ground with blades produces one of the most dam-
aging shock loads a cutter can encounter. If this
occurs repeatedly, the cutter, driveline, and gear-
boxes will be damaged.
The blade cutting edge is approximately 1-3/4 inches
above the bottom of the skid shoes.
Pull-Type Units
To adjust cutter for normal mowing, select a cutting
height (example: 4-inches).
Using any of the optional cutting height mechanisms,
raise or lower the tailwheel and set position A to 2-1/4
inches. Loosen the jam nut on the attitude rod that runs
from the tongue to the tailwheel. Adjust rod in or out
until position B is approximately 1/4 to 1/2 inches more
than position A. Refer to Figure 11.
Figure 11. Cutting Height Adjustment
Mounted Units
To adjust cutter for normal mowing, select a cutting
height (example: 4").
Adjust tractor 3-point hitch to obtain a distance of 2-1/4
inches at position A. See Figure 11.
DS96 - Using the various holes in the tailwheel arms,
align the tailwheel brace with tailwheel arm to obtain a
distance greater than 2-1/4 inches at position B.
Adjust top link to provide 2 inches of clearance
between the break link (2) and the rear lift links. See
Figure 11. This clearance will allow the cutter to float
over uneven terrain.
DS120 - Using any of the optional height adjustment
devices, raise or lower the tailwheel to obtain 2-1/2 to
2-3/4 inches at position B.
Adjust top link to provide 2 inches of clearance
between the break link (2) and the rear lift links. See
Figure 11. This clearance will allow the cutter to float
over uneven terrain.
ATTITUDE ADJUSTMENT (PULL-TYPE)
Normal Mowing
For the most economical power use and best cutting
results, the cutter should be from 1/2" to 3/4" higher at
the rear than at the front.
For grass and weed mowing, adjust cutter to run level
or with the front slightly lower.
Shredding
For shredding, it is better to set rear of cutter slightly
lower than the front. How much lower depends on the
material to be shredded. Determine the best setting for
your situation by experimenting. Use a slow ground
speed for better shredding.
DRIVELINE ADJUSTMENT (PULL-TYPE)
With the cutting height established, adjust the driveline
carrier bearings in the H-frames so that the front drive-
line is parallel to the ground with cutter in cutting posi-
tion.
WHEEL SPACING (DS120 ONLY)
Wheels may be adjusted to any position for row crop
shredding.
BLADE SELECTION
There are two blade options: standard suction blades
and flat double-edge blades.
The standard suction blade is a general use, multi-pur-
pose blade.
The double-edge blade requires less power because it
does not mulch or recut material. It is designed for use
in areas where blade wear is a problem. Sandy soils
are extremely hard on blades.
Blade rotation, viewed from top of cutter, is clockwise
for the right crossbar, and counter-clockwise for the left
crossbar.
When one cutting surface of a double-edge blade is
worn, the opposite one may be used by placing the
blade on a crossbar of the opposite rotation. Blades
from the right may be used on the left. Blades from the
left may be used on the right.
(Rev. 2/6/2009)