User Manual

15 ENGLISH
Observe local regulations if you wish to fell a tree.
►Fig.28: 1. Felling area
— Beforestartingfellingwork,ensurethat:
• Onlypersonsinvolvedinthefellingoperation
areinthevicinity;
• Anypersoninvolvedhasanunhinderedpath
of retreat through a range of approximately
45° either side of the felling axis. Consider
the additional risk of tripping over electrical
cables;
• Thebaseofthetrunkisfreeofforeign
objects,rootsandranches;
• Nopersonsorobjectsarepresentovera
distance of 2 1/2 tree lengths in the direction
in which the tree will fall.
— Considerthefollowingwithrespecttoeachtree:
• Directionoflean;
• Looseordrybranches;
• Heightofthetree;
• Naturaloverhang;
• Whetherornotthetreeisrotten.
— Consider the wind speed and direction. Do not
carry out felling work if the wind is gusting strongly.
— Trimmingofrootswellings:Beginwiththelargest
swellings.Maketheverticalcutrst,thenthe
horizontal cut.
— Stand to the side of the falling tree. Keep an area
clear to the rear of the falling tree up to an angle of
45° either side of the tree axis (refer to the “felling
area”gure).Payattentiontofallingbranches.
— Anescapepathshouldbeplannedandcleared
as necessary before cuts are started. The escape
path should extend back and diagonally to the rear
oftheexpectedlineoffallasillustratedingure.
►Fig.29: 1. Felling direction 2. Danger zone
3.Escaperoute
Whenfellingtrees,followtheproceduersbelow:
1. Cut a scarf as close to the ground as possible.
First make the horizontal cut to a depth of 1/5 -1/3 of the
trunk diameter. Do not make the scarf too large. Then
make the diagonal cut.
►Fig.30
NOTE: The scarf determines the direction in which
the tree will fall, and guides it. It is made on the side
towards which the tree is to fall.
2. Make the back cut a little higher than the base
cut of the scarf. The back cut must be exactly horizon-
tal. Leave approximately 1/10 of the trunk diameter
betweenthebackcutandthescarf.Thewoodbersin
the uncut trunk portion act as a hinge. Insert wedges
into the back cut in time.
►Fig.31
WARNING: Do not cut right through the bers
under any circumstances. The tree will otherwise
fall unchecked.
NOTICE: Only plastic or aluminum wedges may
be used to keep the back cut open. The use of
iron wedges is prohibited.
Carrying tool
Before carrying the tool, always apply the chain brake
and remove the battery cartridges from the tool. Then
attachtheguidebarcover.Alsocoverthebatterycar-
tridge with the battery cover.
►Fig.32: 1. Guide bar cover 2. Battery cover
MAINTENANCE
CAUTION: Always be sure that the tool is
switched off and the battery cartridge is removed
before attempting to perform inspection or
maintenance.
CAUTION: Always wear gloves when perform-
ing any inspection or maintenance.
NOTICE: Never use gasoline, benzine, thinner,
alcohol or the like. Discoloration, deformation or
cracks may result.
Sharpening the saw chain
Sharpen the saw chain when:
• Mealysawdustisproducedwhendampwoodis
cut;
• Thechainpenetratesthewoodwithdifculty,even
whenheavypressureisapplied;
• Thecuttingedgeisobviouslydamaged;
• Thesawpullstotheleftorrightinthewood.
(caused by uneven sharpening of the saw chain or
damage to one side only)
Sharpen the saw chain frequently but a little each time.
Twoorthreestrokeswithaleareusuallysufcientfor
routineresharpening.Whenthesawchainhasbeen
resharpened several times, have it sharpened in our
authorized service center.
Sharpening criteria:
WARNING: An excessive distance between
the cutting edge and depth gauge increases the
risk of kickback.
►Fig.33: 1. Cutter length 2. Distance between cutting
edge and depth gauge 3. Minimum cutter
length (3 mm)
— Allcutterlengthmustbeequal.Differentcutter
lengths prevent the saw chain from running
smoothly and may cause the saw chain to break.
— Do not sharpen the chain when the cutter length
has reached 3 mm or shorter. The chain must be
replaced with new one.
— The chip thickness is determined by the distance
between the depth gauge (round nose) and the
cutting edge.
— The best cutting results are obtained with following
distance between cutting edge and depth gauge.
• Chainblade90PX:0.65mm(0.025″)
• Chainblade91PX:0.65mm(0.025″)
►Fig.34