Manual Dolmar PS-340 (page 14 of 64) (English, French)

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Begin the felling cut slighty higher than the felling

notch and on the opposite side of the tree (fig. 22).

Then cut horizontally through towards the felling notch.

Apply the chain saw with its spikes directly behind the

uncut portion of wood and cut toward the notch (fig.

23). Leave approximately 1/10 of the tree diameter

uncut! This is the hinge (fig. 23). Do not cut through the

hinge because you could lose control of the direction

of the fall. Drive wedges into the felling cut where

necessary to control the direction of the fall. Wedges

should be of wood, light alloy or plastic - never of steel,

which can cause kickback and damage to the chain.

Always keep to the side of the falling tree. When the

tree starts to fall, shut off the engine, withdraw the bar

and walk away on the pre-planned escape path. Watch

out for falling limbs.

WARNING!

Be extremely careful with partially fallen trees which

are poorly supported.

When the tree hangs or for some other reason does

not fall completely, set the saw aside and pull the

tree down with a cable winch, block and tackle or

tractor. If you try to cut it down with your saw, you

may be injured.

Sectioning Method

WARNING!

Felling a tree that has a diameter greater than the

length of the guide bar requires use of either the

sectioning or plunge-cut method. These methods

are extremely dangerous because they involve the

use of the nose of the guide bar and can result in

kickback. Only properly trained professionals should

attempt these techniques.

For the sectioning method (fig. 24) make the first cut

with the guide bar fanning in toward the hinge. Then,

using the bumper spike as a pivot, reposition the saw

for the next cut. Avoid repositioning the saw more than

necessary. When repositioning for the next cut, keep

the guide bar fully engaged in the kerf to keep the

felling cut straight. If the saw begins to pinch, insert a

wedge to open the cut. On the last cut, do not cut the

hinge.

Plunge-Cut Method

Timber having a diameter more than twice the length

of the guide bar requires the use of the plunge-cut

method before making the felling cut.

First, cut a large, wide notch. Make a plunge cut in the

center of the notch.

The plunge cut is made with the guide bar nose. Begin

the plunge cut by applying the lower portion of the

guide bar nose to the tree at an angle (fig. 25). Cut until

depth of the kerf is about the same as the width of the

guide bar (fig. 26). Next, align the saw in the direction

in which the recess is to be cut. With the saw at full

throttle, insert the guide bar in the trunk (fig. 27).

Enlarge the plunge cut as shown in illustration (fig. 28)

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Dolmar PS-340 Manual

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