Komatsu PC138US-11 Operation & Maintenance Manual page 258

Hydraulic excavator
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MACHINE OPERATIONS AND CONTROLS
OPERATION
SHOVEL WORK
A shovel is suitable for excavating at a position higher than the
machine.
Shovel work is performed by attaching the bucket in the re-
verse direction.
DITCHING WORK
Ditching work can be performed efficiently by attaching a buck-
et which matches the digging operation and then setting the
tracks parallel to the line of the ditch to be excavated.
To excavate a wide ditch, first dig both sides and then finally re-
move the center portion.
LOADING WORK
In places where the swing angle is small, work efficiency can
be enhanced by locating the dump truck in a place easily visi-
ble to the operator.
Loading is easier and capacity becomes greater if you stop the
machine at the rear of the dump truck than if loading is done
from the side.
LEVELING WORK
(Machine with blade)
Use the blade for back filling and leveling work after digging
ground.
3-188
WENAM00111

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