Komatsu D61EX-24 Operation & Maintenance Manual page 269

MACHINE OPERATIONS AND CONTROLS OPERATION
WORKS OF CUTTING AND DITCHING HARD OR FROZEN GROUND
For digging and ditch excavation of hard or frozen ground, tilt
the blade. Even hard ground can be dug effectively by a tilted
or angled blade.
WORKS OF FELLING TREES AND REMOVING STUMPS
NOTICE
Do not perform stump removal or other hard work by angling tilting the blade.
For trees with a diameter of 10 to 30 cm {3.9 to 11.8 in} , raise
the blade high and push a few times to fell the tree.
Next, travel in reverse, and dig the corner of the blade into the
ground to cut and dig up the roots.
When doing this, never hit the tree at high speed or apply
shock to fell the tree.
SIDE-CUTTING OPERATION
In side cutting operation with unbalanced load on the blade,
use the counter-rotation turn to change the travel direction. As
a result, the operation becomes efficient.
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