Husqvarna 137 Instruction Manual page 10

• Theinertia-activated chain brake is
activated ifthe front hand guard ispushed
forward, either manually (byhand) or
automatically (by sudden movement).
• If thebrake is already activated, it is
disengaged by pulling the f ront hand guard
back t oward the front handle asfaras
possible,
• When cutting with t he saw, the chain brake
must be disengaged.
Disengaged
Braking function control
CAUTION: The chain brake must be
checked several times daily. The engine
must be running when performing this proce-
dure. This is the only instance when the saw
should be placed on the ground with the en-
gine running.
Place the saw on firm ground. Hold the han-
dles with both hands and apply full throttle.
Activate the chain brake by turning your left
wrist against the hand guard without releas-
ing your grip around the front handle. The
chain should stop immediately.
Inertia activating function control
_IIWARNING:
When performh3g the
followh_g procedure, the engine must be
turned off.
Hold the chain saw approximately 14" (35
cm) above a stump or other wooden surface.
Release your grip on the front handle and
use the weight of the saw to let the top of the
guide bar fall forward and contact the stump.
When the tip of the bar hits the stump, the
brake shouid activate.
IMPORTANT POINTS
• Check chain tension before first use and
after 1 minute of operation. See CHAIN
TENSION in the ASSEMBLY section.
• Cut wood only. Do not cut metal, plastics,
masonry, non-wood building materials, etc.
• Stop the saw if the chain strikes a foreign
object. Inspect the saw and repair parts as
necessary.
• Keepthe chain outofdirtand sand. Evena
small amount of dirt will quickly dull a chain
and increase the possibility of kickback.
• Practice cutting a few small logs using the
following techniques to get the "feel" of us-
ing your saw before you begin a major
sawing operation.
• Squeeze the throttIe trigger and allow
the engine to reach full speed before cut-
ting.
• Begin cutting with the saw frame against
the log.
• Keep the engine at full speed the entire
time you are cutting.
• AIIowthechaintocutforyou. Exert only
light downward pressure.
• Release the throttle trigger as soon as
the cut is completed, allowing the engine
to idle. If you run the saw at full throttle
without a cutting load, unnecessary
wear can occur to the chain, bar, and en-
gine. It is recommended that the en-
gine not be operated for longer than
30 seconds at full throttle.
• To avoid losing control when cut is com-
plete, do not put pressure on saw at end
of cut.
• Stop the engine before setting the saw
down,
TREE FELLING TECHNIQUES
_WARNING:
Check for broken or
dead branches which can fall while cutting
causing serious injury. Do not cut near build-
ings or electrical wires if you do not know the
direction of tree fall, nor cut at night since you
will not be able to see well, nor during bad
weather such as rain, snow, or strong winds,
etc. If thetree makes contact with any utility
line, the utility company should be notified
immediately.
• Carefullyplanyoursawingoperation inad-
vance.
• Cleartheworkarea. You needacleararea
all around the tree so you can have secure
footing.
• The chain saw operator should keep on
the uphill side of the terrain as the tree is
likely to roll or slide downhill after it is felled.
• Study the natural conditions that can
cause the tree to fall in a particular direc-
tion.
Natural conditions that can cause a tree to
fall in a particular direction include:
• The wind direction and speed.
• The lean of the tree. The lean of a tree
might not be apparent due to uneven or
sloping terrain. Use a plumb or level to de-
termine the direction of tree lean.
• Weight and branches on one side.
• Surrounding trees and obstacles.
Look for decay and rot. If thetrunk is rotted,
it can snap and fall toward the operator.
Check for broken or dead branches which
can fall on you while cutting.
Make sure there is enough room for the tree
to fall Maintain a distance of 2-1/2 tree
lengths from the nearest person or other ob-
jects. Engine noise can drown out a warning
call
Remove dirt, stones, loose bark, nails, sta-
ples, and wire from the tree where cuts are to
be made.
Plan a clear retreat path to the rear and diag-
onal to the line of fall.
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