waratah HTH618C, Руководство оператора

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Operation: Thinning Techniques
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Plantation Out Row
Cut-to-Length at Stump
When felling while thinning, place the harvester head
approximately two metres (seven feet) up the tree, and
then feed down the stem. This will facilitate delimbing,
and create a clear area for the harvester head to grip
when felling. This is the purpose of the arms on the
harvester head.
Different methods, such as cut-to-length, are used in order
to gain the maximum merchantable volume and reduce
bark damage to remaining trees.
A path of stems approximately four metres (13 feet) wide
is felled to allow access to both the harvester head and
the forwarder. While this path is being harvested, stems
on both sides of the path are harvested and processed.
Stems are stacked on either side, ready to be uplifted by
the forwarder.
•
Decide where to stack the stems.
First, fell the tree on the left and process it to the left
or right. Process the stems over the path and lay the
stems on the opposite side. This method results in the
harvesting slash being left on the path, thus providing a
better load-bearing surface for both carrier and forwarder
and a clean area for the stacks.
With this system, trees can be felled consecutively left and
right to reduce the amount of harvester head movement,
ensuring stacks are positioned so the forwarder can easily
uplift them.
When stacking, use separate piles to identify grades,
which will ease the uplifting process.
Color marking enhances this operation and reduces the
area required for stock-piling.
Full Tree thinning
This procedure is similar to that described above.
This system is used in conjunction with skidding extraction.
The pathway is harvested in the same manner with the
same spacing.
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More care is required when felling, to correctly position
the stem, allowing processing without damage to standing
stems.
The direction of the processed stems is such that
extraction is facilitated and bark damage is minimized. It
is not always possible to process over the pathway, so
harvesting slash is distributed over the complete swathe.
Stems need to be processed and stock piled with the
butts placed allowing access from the pathway by the
extraction carrier.
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