Komatsu D155A-6 Operation & Maintenance Manual page 195

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OPERATION
CUTTING INTO HARD OR FROZEN GROUND OR DITCHING
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.
FELLING TREES, REMOVING STUMPS
NOTICE
Do not uproot trees or stumps or fell trees by angling or 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 2 or 3 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.
PUSHER OPERATIONS
NOTICE
Always install a pusher plate when carrying out pusher operations.
When approaching the other machine, use the decelerator pedal or fuel
control dial to reduce the travel speed and approach the other machine
slowly. After making contact, raise the travel speed gradually and push
at full power.
3 - 144
OPERATION

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