7. Once the stump is at ground level, continue to take up to 2” (50 mm) deep passes until the
stump and roots are 4-6” (100-150 mm) below grade. Keep a watch out for foreign objects
below the soil like rocks or buried metal. These can damage or break the teeth resulting in
poor grinding performance.
8. During use, it is important to never let the stump grinder sway beyond an angle that will
allow the PTO shaft to separate. Do not operate the stump grinder with less than 6” (150
mm) of overlap between the two halves of the PTO shaft. If the stump grinder begins to
sway, it means either the tractor is advancing faster than the grinder can remove material or
that too much material is being removed per pass. If this is observed, immediately stop
moving forward and position the tractor and stump grinder in a manner so that it is in the
vertical position. Take a slower pass and/or shallower cut if necessary.
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