Komatsu PC12R-8, Operation & Maintenance Manual

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107
USING THE WORK EQUIPMENT
3.13.3 DIGGING METHOD
DANGER
•
The geometry of the rotation fulcrum of the arms and the bucket make it possible to dig even beyond
the stabilizer line, which makes the ground give way. Do not dig beyond the boom fulcrum line, since
the ground may collapse and cause the machine to overturn.
1 - At the beginning of work, keep the bucket at the correct penetration angle.
2 - Once the desired digging depth has been reached, position the bucket with its back parallel to bottom of the
excavation and then start filling.
3 - During the collection phase, make the bucket, the boom and the arm move simultaneously; combined move-
ments facilitate the filling of the bucket and therefore increase productivity.
4 - he removal depth must be correct and suitable for the type of ground; excessive depth may lock the move-
ments, overload the engine and the pump and slow down the digging operations.
5 - To dump on heaps, dump the bucket as soon as it gets near the dumping area; the inertia resulting from the
movement will ensure the compaction of the material with no need to use the bucket for this purpose, which
avoids impacts and vibrations that facilitate the wear of pins and bushings.
RWA00530
3
2
1
CORRECT DIGGING METHOD
(Sequence 1 - 2 - 3)
RWA00500
CORRECT
The bucket works with its flat surface par-
allel to the ground.
RWA00510
INCORRECT
The bucket is thrusted downwards, slow-
ing down the digging work.
RWA00520
INCORRECT
The bucket is pushed upwards and there-
fore is not filled completely.