Komatsu PC400LC-5 Operation & Maintenance Manual page 113

12.14 WORK POSSIBLE USING HYDRAULIC
EXCAVATOR
In addition to the following, it is possible to further increase the
range of applications by using various attachments.
12.14.1 BACKHOE WORK
When condition of the machine is as shown in the diagram at
right, each cylinders maximum pushing excavation force is obtained
when the bucket cylinder and link, arm cylinder and arm are at 90".
When excavating, use this angle effectively to optimize your
work efficiency.
The range for excavating with the arm is from a 45" angle away from
the machine to a 30" toward the machine.
There may be some differences depending on the excavation
depth, but try to use within the above range rather than going all the
way to the extreme end of the cylinder stroke.
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12.14.2 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
reverse direction.
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12.14.3 DITCHING WORK
Ditching work can be performed efficiently by attaching a bucket
to match the width of the ditch and then setting the tracks parallel
to the line of the ditch to be excavated.
To excavate a wide ditch, first dig out both sides and then finally
remove the center portion.
12.14.4 LOADING WORK
In places where the swing angle is small, work efficiency can be
enhanced by locating the dump truck in a place easily visible to the
operator.
Loading is easier and capacity greater if you begin from the front
of the dump truck body than if loading is done from the side.
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