Komatsu Utility PC26MR-3, Operation & Maintenance Manual

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USE OF THE MACHINE AND RELATED CONTROLS
136 WEAM009500
3.3.12 OPERATIONS THAT CAN BE PERFORMED WITH THE HYDRAULIC
EXCAVATOR
In addition to those indicated below, many other applications are possible, thanks to the use of various attach-
ments.
DIGGING WITH REVERSED BUCKET
When the machine is in the position shown in the diagram on the
right, the maximum digging force and thrusting force of the single
cylinders is obtained when the bucket cylinder and the relevant
articulation, the arm cylinder and the arm are at 90° with respect
to each other.
During digging operations, keep this amplitude to increase the ef-
ficiency of the machine.
The positions available for digging with the arm range from a 45°
angle away from the machine to a 30° angle towards the ma-
chine.
There may be some differences depending on the digging depth,
but it is advisable to try to keep within the above range rather than
operate with the cylinders reaching the end of stroke.
DITCH DIGGING
Ditch digging operations may be effectively carried out by install-
ing a bucket suitable for this type of digging and positioning the
tracks parallel to the ditch digging line.
To create wide ditches, first dig on both sides and then remove
the earth at the centre.
LOADING OPERATIONS
In the positions in which the swing angle is reduced, operational
efficiency can be increased by positioning the lorry in such a way
that the Operator can clearly see it.
The loading operation is easier and the loading capacity is greater
if the hydraulic backhoe loads material from the back of the lorry
rather than from its sides.