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STUMP GRINDING PROCEDURE
STUMP GRINDING PROCEDURE
The flywheel spins clockwise (when facing the rear of the
machine) with the effective cuttingarea in the lower-left
quadrant as shown below:
Observe all operating and safety instructions in thisman-
ual and those on the Stump Grinder before using this
machine.
Position the tractor for grinding a stump. The 3 pt. frame
should be lowered to the ground before grinding the
stump. Three point hitch lift arm stabilizer bars, sway
chains or sway blocks must be used to control side move-
ment of the stump grinder.
NOTE: Be sure parking stand is fully raised and fastened
with a locking pin before using the stump grinder.
Set the tractor brakes or place the transmission in
"PARK." Raise the cutting wheel and have it positioned to
the left side of the stump and all the way to the left side
of the machine.
Right-hand or left-hand reference is determined by stand-
ing at the rear of the stump grinder and facing in the
forward direction of travel of the power unit.
When engaging and disengaging the PTO, the engine
speed should always be low. Once the PTO is engagedand
ready to start cutting, raise the PTO speed to 540 RPM
and maintain throughout stump cutting operation.
ALWAYS operate the PTO at 540 RPM. This is necessary
to maintain proper wheel speed to obtain a clean, smooth
cut. Do not disengage PTO when the engine is at full PTO
RPM. Always bring the tractor engine to idle speed before
disengaging the PTO.
NOTE: To avoid damage to the clutch, the cutter wheel
should not be in contact with the stump when engaging
the PTO.
When grinding a tree stumpalways start from the right
side of the stum, moving incrementally to the left, pulling
the grinder straight forward through the stump on each
pass. When grindi softwoods like pine, spruce, or poplar, it
may be permissible to remove upwards of 2" (50 mm) of
material per pass. However, hardwoods like oak, ash, and
birch can be much more dense and the depth of grind may
only be up to 1" (25 mm). If the chassis is swaying like
described in the previous section, or the grinder is vibrat-
ing or bouncing, reduce the depth of cut or fee rate accord-
ingly.
Start the wheel on the edge of the stump and engage the
side hydraulic cylinder to make a light cut across the
stump.
When the first cutting pass is complete, raise the cutting
wheel slightly with the depth control cylinder and then
activate the side control cylinder to move the wheel back
to the start position.
Before moving the machine into position,
remove loose chunks of wood, stones,
wire, and other debris from the stump and
work area that might be thrown, causing
injury or damage.
When cutting a stump, the operator must
wear eye protection and must stay on the
power unit seat.
Effective
cutting area
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