Husqvarna 317 321 EL Electric Chainsaw Owners Manual

Danger zone
A
2
danger
zone
surrounds
the
tree
to
a
distance
of
Notch depth should  be around 1/4 of the
diameter of the tree and the  angle should
be around 45°.
1/2  times  the height  of  the  tree.  See to  it  that  no one  is
standing within  this zone while you are felling  the tree.
Felling direction
The line defined by the inside angle of the
notch  must  be  precisely  horizontal  and
at  a precise  right  angle  to the  direction
of fall.
When felling  a tree, one always  aims to place  it where neither
objects  nor  difficult  terrain  will  hamper  limbing  and  cutting.
Unobstructed movement  and secure footing  are essential.
It is  also important  to  avoid lodging  the tree  against  another
tree. A lodged tree  is extremely dangerous.
Felling cut
The felling  cut is done  from the opposite
After  determining  where you  want  the  tree to  fall,  you must
also  consider   the   likely  unaided   direction   of  fall.   This  is
affected  by the  straightness and  lean  of the  tree, wind  direc-
tion, concentration  of branches and any snow  that may weigh
the tree down.
side
of   the   tree   and   must   also   be
horizontal. Stand with  the tree to your left
and cut with  the bottom of  the guide bar
(pulling chain).
After  assessing  all these  factors,  you may  find  you  have no
choice but to fell the tree  in its natural direction of fall because
your preferred direction  of fall is likely to fail.
Place  the  FELLING  CUT  approximately
3-5
cm (1  1/2 -  2”) above  the  BOTTOM
NOTCH CUT.
Another important factor affecting your personal safety, though
it has no bearing on the direction  of fall, is the presence of any
dead branches  which could fall while you  are felling the tree.
Cut at  full motor speed,  feeding the  saw
slowly  into  the tree.  Watch  out  for  tree
movement opposite to the intended direc-
tion of  fall. Insert  a WEDGE  or FELLING
BAR in the FELLING  CUT as soon as the
depth of the cut  permits.
Clearing branches/Line of retreat
Remove  any branches  from around
Planned Direction of fall
Danger zone
the  base of  the  tree  which may  in-
terfere with your  work. It is safest to
work from the top down and to keep
the tree  trunk between  you and  the
running  chain.  Never  cut branches
above shoulder  height.  Clear under-
growth around  the tree  and identify
When complete,  the FELLING  CUT must
be  parallel   to  the   notch  and   leave   a
strip  of HINGE  WOOD  at least  1/10 the
diameter of the  tree.
Retreat
Retreat
Danger zone
your line  of retreat or escape,  taking note  of any obstructions
(stones, branches,  holes, etc.).Your line of retreat should  be at
an angle, around  135° behind the direction  of fall.
The   HINGE   WOOD   acts   as   a  hinge,
steering the direction  of the falling tree.
Felling
If the  HINGE WOOD  is  too small  or has
been  sawn   through,  or  if  the
Three  cuts are  made  to fell  a tree.  The  «TOP NOTCH  CUT»
and  the «BOTTOM»   or «HORIZONTAL  NOTCH  CUT»  forms
the  «NOTCH»,  which  determines  the  direction  in which  the
tree will fall. The final  cut is the «FELLING CUT»,  which allows
the tree to topple  over.
notch  and   the  felling  cut   are
mismatched,
the   tree   is   no
longer under control.
Notch
As the  felling  cut approaches  the  notch,
the  tree   should  start  falling,   either  by
itself  or  with  the  help  of  a  WEDGE   or
FELLING BAR.
To form  the NOTCH,  start  with the  TOP
NOTCH  CUT.  Using  the  bottom  of  the
guide  bar   (pulling   chain),  make   a  45°
downward  angled cut  at right  angles  to
the intended direction  of fall.
Next   do   the  BOTTOM    NOTCH   CUT,
ensuring that  it meets  the bottom  of the
TOP NOTCH CUT  precisely.
14
Product Specification
CategoriesChainsaw Manuals, Husqvarna Chainsaw Manuals
Tags,
Model Year2003, 2004, 2005
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- 16 pages
Document TypeOperator's Manual
LanguageEnglish
Product BrandHusqvarna, Chainsaw
Document File TypePDF
Publisherhusqvarna.com
Wikipedia's PageHusqvarna
CopyrightAttribution Non-commercial
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