GreenWorks CSF403, Operator'S Manual

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Figure 22
1. Start the machine.
2. Turn your left hand around the front handle to engage the
chain brake.
3. Pull the handle guard / chain brake toward the front
handle to disengage the chain brake.
4. Call approved service center for repair before use if
• The chain brake does not stop the chain immediately.
• The chain brake does not stay in the disengaged
position without aid.
4.6 FELL A TREE
Figure 9-10.
It is recommended that the first-time user should, as a
minimum practice, cutting logs on a saw-horse or cradle.
Before you start to fell a tree, make sure that
• The minimum distance between the areas of bucking and
felling is two times the height of the tree.
• The operation does not
• Cause injury to personnel.
• Hit utility lines. If the tree touches utility lines,
immediately tell the utility company.
• Cause losses in property.
• The user is not in the dangerous area, for example, the
downhill side of the area.
• The escape paths that extend back and diagonally behind
the felling direction are clear. The felling direction is
controlled by
• The natural lean of the tree.
• The location of larger branches.
• The wind direction.
• There are no dirt, stones, loose bark, nails, and staples on
the tree.
1. Make a lower level notching cut. Make sure that this
cut is
a) 1/3 width of the diameter of the tree.
b) Perpendicular to the felling direction.
CAUTION
The level notching cut helps prevent pinching of the
saw chain or the guide bar when you make the second
notch.
2. Make the felling cut no less than 50 mm and higher
than the level notching cut. Make sure that this cut
a) Is parallel to the level notching cut.
b) Keeps sufficient wood to become a hinge which
prevents the tree from twisting and felling to the
wrong direction.
When the felling cut gets near the hinge, the tree falls.
Stop the felling cut if the tree
• Does not fall to the correct direction or
• Moves backwards, causing the cutting bar and chain
to become stuck in the cut.
3. Use felling wedge to open the cut and let the tree fall
to the correct direction.
4. When the tree starts to fall,
a) Remove the chainsaw from the cut.
b) Stop the machine.
c) Put the machine down.
d) Go away through the escape path. Be careful with
overhead branches and your footing.
4.7 LIMB A TREE
Figure 11.
Limbing is to remove the branches from a fallen tree.
1. Keep the larger lower branches to hold the log off the
ground.
2. Remove the small limbs in one cut.
3. Limb the branches with tension from the bottom to up.
4. Keep the larger lower branches as a support until the log
is limbed.
4.8 BUCK A LOG
Figure 12-15.
Bucking is to cut a log into lengths. Keep your body balance.
If it is possible, lift the log and hold it with branches, logs or
chock.
• When the log is held along the full length, cut it from the
top.
• When the log is held on one end,
1. Cut the first time 1/3 of the diameter from the bottom.
2. Cut the second time from the top to complete the
bucking.
• When the log is held on two ends,
1. Cut the first time 1/3 of the diameter from the top.
2. Cut the second time lower 2/3 from the bottom to
complete the bucking.
• When the log is on a slope,
1. Stand on the uphill side.
2. Control the chainsaw.
3. Hold the handles tightly.
4. Release the cut pressure near the end of the cut.
NOTE
Do not let the chain touch the ground.
When bucking is complete,
1. Release the trigger.
2. Stop the chainsaw fully.
3. Move the chainsaw from tree to tree.
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