14 ► CS11
Service Manual
FELLING
(CUTTING DOWN A TREE) (FIGURE 2)
Observe all safety precautions. The spiked bumper
(bucking cleat) must be installed for this operation.
Figure 2. Felling a Tree
NOTCHING OR UNDERCUTTING
1. The notching or undercutting cut is made on the side
you want the tree to fall. Place the saw so the hand
guard is close to the tree trunk and the bucking cleat
is dug in.
2.
Start the cut horizontally. Pivot the nose of the bar in
last. Cut to about one-quarter of the tree’s diameter.
3. Watch out for falling limbs.
4.
Make a diagonal cut down to meet the hori zontal cut
and remove the wood from the notch.
FELLING OR BACK CUT
5. The felling or back cut is made on the side opposite
and at least 2 inches above the hori zontal undercut
(the felling cut is made higher as
the size of the tree
increases). Place the saw so the hand guard is close
to the tree trunk and the bucking cleat is dug in.
6. Start the cut horizontally. Pivot the bar in until the cut
is being made parallel to the notch cut. Cut until the
saw is about 1 or 2 inches from the notch. Do not cut
through the notch.
Note: The uncut wood between the felling and notch
cuts is called the hinge. The hinge controls the fall
of the tree and should be of uniform thick ness.
7.
As the saw nears the back cut, watch the treetop
and the cut for signs of movement. Be alert as
soon as the tree starts to move, turn off the saw,
pull it from the tree and move away quickly on your
escape route.
8.
For trees larger than bar length, make two felling
cuts. Cut in as far as the bar will go, move to the other
side and start the second cut in the same manner as
the first while pivoting the saw to complete the felling
cut.
BUCKING
Bucking is the sawing of a log or fallen tree into smaller
pieces.
1. Observe all safety precautions.
2.
Use both hands. Grip the saw firmly.
3. Stand uphill. A log that is cut loose may roll downhill.
4.
Keep the chain out of the dirt. Dirt will dull the chain.
A dull chain is unsafe.
5. Stand to the left of the saw.
CROSSCUTTING
Note: Before starting to cut through a log try to
imagine what is going to happen. Look out for
stresses in the log and cut through the log in such a
manner that the guide bar will not get pinched.
LOGS WITH PRESSURE ON TOP
(FIGURE 3)
6.
Observe all safety precautions.
7.
Begin with an upper cut, down from the top. Do not
cut too deeply. A cut of about 1/3 of the log diameter
is enough.
8.
Finish with a bottom cut. They should meet.
Figure 3. Crosscutting Logs with Pressure on Top
THICK LOGS LARGER THAN BAR LENGTH WITH
PRESSURE ON TOP (FIGURE 4)
OPERATION
