Efco MTT 3600 Manuel D'utilisation Et D'entretien page 23

chain brake lever / hand guard toward the bar
while the chain is rotating rapidly.
3. The chain brake should engage and stop the
chain immediately, if not, take the saw to a
Servicing Dealer for repair and discontinue
use until the repair is made.
4. Reset the chain brake back into the run
position by grasping the guide bar side (right
side from operator's position) of the chain
brake lever / hand guard and pull toward the
front handle until an audible click is heard. See
Fig. 3.
WARNING: If chain brake does not stop
the chain immediately, take the saw to a
Servicing Dealer for repair prior to use.
WARNING: An improperly maintained
chain brake may increase the time needed
to stop the chain after activation, or may not
activate at all.
WARNING: This chainsaw equipped with
a top handle is designed specifically
for tree surgery and maintenance. Due to
the special handle design (closely spaced
handles), there is an increased risk in its
use. For this reason this special chainsaw
should be used only for work in a tree by
persons trained in special cutting and working
techniques. This type of chainsaw cannot be
used for felling operations; for this reason,
this manual does not contain instructions for
felling. For bucking and other operations on
ground the use of a normal forest chainsaw is
highly recommended.
Bucking
Bucking is the term used for cutting a fallen tree
to the desired log length.
· Cut only one log at a time.
WARNING: Support small logs on a saw
horse or another log while bucking. Never
allow another person to hold the log while
cutting and never hold the log with your leg
or foot.
WARNING: Keep a clear cutting area. Make
sure that no objects can contact the guide
bar nose and chain during cutting, this can
cause kickback (Fig. 15).
WARNING: During bucking operations
always stand on the uphill side so that the
cut-off section of the log can not roll over you.
WARNING: If saw becomes pinched or
hung in a log, don't try to force it out. You
can lose control of the saw resulting in injury
and/or damage to the saw. Stop the saw,
drive a wedge of plastic or wood into the cut
until the saw can be removed easily. Restart
the saw and carefully reenter the cut. Do not
attempt to restart your saw when it is pinched
or hung in a log.
WARNING: Do not stand on the log being
cut. Any portion can roll causing loss of
footing and control. Do not cut in an area
where logs, limbs, and roots are tangled.
Drag the logs into a clear area before cutting
by pulling out exposed and cleared logs first.
Bucking with a Wedge
If the wood diameter is large enough for you to
insert a soft bucking wedge without touching
the chain, you should use the wedge to hold the
cut open to prevent pinching.
Logs Under Stress
Make the first bucking cut 1/3 of the way through
the log and finish with a 2/3 cut on the opposite
side. As the log is being cut, it will tend to bend.
The saw can become pinched or hung in the log
if you make the first cut deeper than 1/3 of the
diameter of the log.
Give special attention to logs under stress to
prevent the bar and chain from pinching.
Types of Cutting Used
Overbucking
Begin on the top side of the log with the bottom
of the saw against the log; exert light pressure
downward.
Underbucking
Begin on the under side of the log with the top of
the saw against the log; exert light pressure
upward. During underbucking, the saw will tend
to push back at you. Be prepared for this reaction
and hold the saw firmly to maintain control.
WARNING: Never turn saw upside down
to undercut. The saw cannot be controlled
en
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